mockforge_bench/conformance/

executor.rs

//! Native Rust conformance test executor
//!
//! Replaces the k6-based execution path with direct HTTP requests via reqwest,
//! producing the same `ConformanceReport` output. This removes the k6 binary
//! dependency and enables API/SDK integration.

use super::custom::{CustomCheck, CustomConformanceConfig};
use super::generator::ConformanceConfig;
use super::report::{ConformanceReport, FailureDetail, FailureRequest, FailureResponse};
use super::spec::ConformanceFeature;
use super::spec_driven::{AnnotatedOperation, ApiKeyLocation, SecuritySchemeInfo};
use crate::error::{BenchError, Result};
use reqwest::{Client, Method};
use std::collections::{HashMap, HashSet};
use std::time::Duration;
use tokio::sync::mpsc;

/// A field-level schema validation violation
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub struct SchemaViolation {
    /// JSON path to the field that failed validation (e.g., "/name", "/items/0/age")
    pub field_path: String,
    /// Type of violation (e.g., "type", "required", "additionalProperties")
    pub violation_type: String,
    /// What the schema expected
    pub expected: String,
    /// What was actually found
    pub actual: String,
}

/// A single conformance check to execute
#[derive(Debug, Clone)]
pub struct ConformanceCheck {
    /// Check name (e.g., "param:path:string" or "param:path:string:/users/{id}")
    pub name: String,
    /// HTTP method
    pub method: Method,
    /// Relative path (appended to base_url)
    pub path: String,
    /// Request headers
    pub headers: Vec<(String, String)>,
    /// Optional request body
    pub body: Option<CheckBody>,
    /// How to validate the response
    pub validation: CheckValidation,
}

/// Request body variants
#[derive(Debug, Clone)]
pub enum CheckBody {
    /// JSON body
    Json(serde_json::Value),
    /// Form-urlencoded body
    FormUrlencoded(Vec<(String, String)>),
    /// Raw string body with content type
    Raw {
        content: String,
        content_type: String,
    },
    /// Round 38 (#79) — multipart/form-data with file attachments.
    /// Bytes are read from disk at request time so a YAML can name a
    /// 50 MiB `.docx` without inflating the config. Use one entry per
    /// part; the executor builds a single `reqwest::multipart::Form`
    /// containing all of them so multi-file uploads land in one
    /// request.
    Multipart { parts: Vec<MultipartPart> },
}

/// Round 38 (#79) — one part of a multipart/form-data request body.
#[derive(Debug, Clone)]
pub struct MultipartPart {
    /// Bytes that go on the wire as the part body.
    pub bytes: Vec<u8>,
    /// `Content-Type` for this part (e.g. `image/jpeg`,
    /// `application/octet-stream`, `application/json`).
    pub content_type: String,
    /// Multipart form field name (the key on the receiving server).
    pub field_name: String,
    /// Filename announced in this part's `Content-Disposition` header.
    pub filename: String,
}

/// Round 38 (#79) — chain metadata stored alongside a custom
/// `ConformanceCheck`. Tells the executor how to substitute captured
/// values into the request, how to capture values from the response,
/// and how to repeat the check.
#[derive(Debug, Clone, Default)]
struct ChainMeta {
    /// What to capture from the response on success. Empty when the
    /// check declared no `extract` rules.
    extract: super::custom::ExtractRules,
    /// How many times to fire this check within one outer
    /// `chain_iterations` pass, sequentially or in parallel.
    repeat: super::custom::Repeat,
}

/// Round 38 (#79) — values captured during a chain run, keyed by the
/// name the YAML asked for them under. `cookies` is kept separate so
/// `${cookie:session}` and `${var:session}` substitute different
/// things even if they happen to share a name.
#[derive(Debug, Default, Clone)]
struct ChainContext {
    vars: HashMap<String, String>,
    cookies: HashMap<String, String>,
}

impl ChainContext {
    /// Substitute every `${var:NAME}`, `${cookie:NAME}`, and
    /// `${header:NAME}` token in `text` with the corresponding
    /// captured value. Unknown tokens are left in place verbatim so a
    /// missing capture is obvious in the request log rather than
    /// silently sending an empty string.
    fn substitute(&self, text: &str) -> String {
        let mut out = String::with_capacity(text.len());
        let mut rest = text;
        while let Some(start) = rest.find("${") {
            out.push_str(&rest[..start]);
            let after = &rest[start + 2..];
            if let Some(end) = after.find('}') {
                let token = &after[..end];
                let replaced = if let Some(name) = token.strip_prefix("var:") {
                    self.vars.get(name).cloned()
                } else if let Some(name) = token.strip_prefix("cookie:") {
                    self.cookies.get(name).cloned()
                } else {
                    // Round 38 — `${header:...}` aliases `${var:...}` for
                    // captures recorded under the `headers` extraction
                    // block. Same map, just a more readable token shape.
                    token.strip_prefix("header:").and_then(|name| self.vars.get(name).cloned())
                };
                if let Some(value) = replaced {
                    out.push_str(&value);
                } else {
                    // Preserve the original `${...}` so a missing
                    // capture is visible in failure detail / logs.
                    out.push_str("${");
                    out.push_str(token);
                    out.push('}');
                }
                rest = &after[end + 1..];
            } else {
                out.push_str("${");
                rest = after;
                break;
            }
        }
        out.push_str(rest);
        out
    }
}

/// How to validate a conformance check response
#[derive(Debug, Clone)]
pub enum CheckValidation {
    /// status >= min && status < max_exclusive
    StatusRange { min: u16, max_exclusive: u16 },
    /// status === code
    ExactStatus(u16),
    /// Schema validation: status in range + JSON body matches schema
    SchemaValidation {
        status_min: u16,
        status_max: u16,
        schema: serde_json::Value,
    },
    /// Custom: exact status + optional header regex + optional body field type checks
    Custom {
        expected_status: u16,
        expected_headers: Vec<(String, String)>,
        expected_body_fields: Vec<(String, String)>,
    },
}

/// Progress event for SSE streaming
#[derive(Debug, Clone, serde::Serialize)]
#[serde(tag = "type")]
pub enum ConformanceProgress {
    /// Test run started
    #[serde(rename = "started")]
    Started { total_checks: usize },
    /// A single check completed
    #[serde(rename = "check_completed")]
    CheckCompleted {
        name: String,
        passed: bool,
        checks_done: usize,
    },
    /// All checks finished
    #[serde(rename = "finished")]
    Finished,
    /// An error occurred
    #[serde(rename = "error")]
    Error { message: String },
}

/// Result of executing a single conformance check
#[derive(Debug)]
struct CheckResult {
    name: String,
    passed: bool,
    failure_detail: Option<FailureDetail>,
    /// Captured request/response data for --export-requests (always populated
    /// when export_requests is enabled, regardless of pass/fail).
    captured: Option<CapturedExchange>,
}

/// A captured HTTP exchange for the --export-requests feature
#[derive(Debug, serde::Serialize)]
struct CapturedExchange {
    method: String,
    url: String,
    request_headers: HashMap<String, String>,
    request_body: String,
    response_status: u16,
    response_headers: HashMap<String, String>,
    response_body: String,
}

/// Native conformance executor using reqwest
pub struct NativeConformanceExecutor {
    config: ConformanceConfig,
    client: Client,
    checks: Vec<ConformanceCheck>,
    /// Round 38 (#79) — per-check chain metadata. Keyed by the index
    /// in `checks`. Entries are only present for custom checks that
    /// declared a non-default `extract` block or `repeat` config in
    /// the YAML.
    chain_meta: HashMap<usize, ChainMeta>,
    /// Round 38 (#79) — how many times to repeat the entire chain
    /// of custom checks. Built-in spec checks always run once. Reset
    /// to a fresh `ChainContext` at the start of each iteration so
    /// captures from iteration K do not leak into K+1.
    chain_iterations: u32,
    /// Round 46 (#79) — Srikanth on 0.3.190 Q3: append-only sink for
    /// network-level wire errors that fell short of an HTTP response
    /// (connect refused, TLS reject, request timeout, etc). Drained
    /// at the end of the run into `conformance-network-events.json`
    /// so the user can see WHEN traffic stopped landing and WHY,
    /// without having to grep through reqwest's debug logs.
    network_events: std::sync::Mutex<Vec<NetworkEvent>>,
}

/// Round 46 (#79) — one wire-level error captured by the native
/// executor (no HTTP response from the target). Persisted to
/// `conformance-network-events.json` so the user has a grep-able log
/// of when the target stopped responding and the classified reason.
#[derive(Debug, Clone, serde::Serialize)]
pub struct NetworkEvent {
    /// When the failure was observed by the bench client.
    pub timestamp: chrono::DateTime<chrono::Utc>,
    /// Check name (e.g. `body:json:/v1/organizations` or `custom:get`).
    pub check: String,
    /// HTTP method we attempted.
    pub method: String,
    /// Full target URL (post-substitution) we tried to reach.
    pub url: String,
    /// Classified error kind: `connect` (TCP refused / no route),
    /// `timeout`, `tls`, `body`, `decode`, `request`, `other`.
    pub kind: String,
    /// Verbatim error string from reqwest for context.
    pub message: String,
}

impl NativeConformanceExecutor {
    /// Create a new executor from a `ConformanceConfig`
    pub fn new(config: ConformanceConfig) -> Result<Self> {
        let mut builder = Client::builder()
            .timeout(Duration::from_secs(30))
            .connect_timeout(Duration::from_secs(10));

        if config.skip_tls_verify {
            builder = builder.danger_accept_invalid_certs(true);
        }

        let client = builder
            .build()
            .map_err(|e| BenchError::Other(format!("Failed to build HTTP client: {}", e)))?;

        Ok(Self {
            config,
            client,
            checks: Vec::new(),
            chain_meta: HashMap::new(),
            chain_iterations: 1,
            network_events: std::sync::Mutex::new(Vec::new()),
        })
    }

    /// Round 46 (#79) — push one wire-level failure into the
    /// `conformance-network-events.json` sink. Best-effort; if the
    /// mutex is poisoned the event is dropped silently rather than
    /// crashing the run mid-bench.
    fn record_network_event(&self, ev: NetworkEvent) {
        if let Ok(mut guard) = self.network_events.lock() {
            guard.push(ev);
        }
    }

    /// Populate checks from hardcoded reference endpoints (`/conformance/*`).
    /// Used when no `--spec` is provided.
    #[must_use]
    pub fn with_reference_checks(mut self) -> Self {
        // --- Parameters ---
        if self.config.should_include_category("Parameters") {
            self.add_ref_get("param:path:string", "/conformance/params/hello");
            self.add_ref_get("param:path:integer", "/conformance/params/42");
            self.add_ref_get("param:query:string", "/conformance/params/query?name=test");
            self.add_ref_get("param:query:integer", "/conformance/params/query?count=10");
            self.add_ref_get("param:query:array", "/conformance/params/query?tags=a&tags=b");
            self.checks.push(ConformanceCheck {
                name: "param:header".to_string(),
                method: Method::GET,
                path: "/conformance/params/header".to_string(),
                headers: self
                    .merge_headers(vec![("X-Custom-Param".to_string(), "test-value".to_string())]),
                body: None,
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });
            self.checks.push(ConformanceCheck {
                name: "param:cookie".to_string(),
                method: Method::GET,
                path: "/conformance/params/cookie".to_string(),
                headers: self
                    .merge_headers(vec![("Cookie".to_string(), "session=abc123".to_string())]),
                body: None,
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });
        }

        // --- Request Bodies ---
        if self.config.should_include_category("Request Bodies") {
            self.checks.push(ConformanceCheck {
                name: "body:json".to_string(),
                method: Method::POST,
                path: "/conformance/body/json".to_string(),
                headers: self.merge_headers(vec![(
                    "Content-Type".to_string(),
                    "application/json".to_string(),
                )]),
                body: Some(CheckBody::Json(serde_json::json!({"name": "test", "value": 42}))),
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });
            self.checks.push(ConformanceCheck {
                name: "body:form-urlencoded".to_string(),
                method: Method::POST,
                path: "/conformance/body/form".to_string(),
                headers: self.custom_headers_only(),
                body: Some(CheckBody::FormUrlencoded(vec![
                    ("field1".to_string(), "value1".to_string()),
                    ("field2".to_string(), "value2".to_string()),
                ])),
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });
            self.checks.push(ConformanceCheck {
                name: "body:multipart".to_string(),
                method: Method::POST,
                path: "/conformance/body/multipart".to_string(),
                headers: self.custom_headers_only(),
                body: Some(CheckBody::Raw {
                    content: "test content".to_string(),
                    content_type: "text/plain".to_string(),
                }),
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });
        }

        // --- Schema Types ---
        if self.config.should_include_category("Schema Types") {
            let types = [
                ("string", r#"{"value": "hello"}"#, "schema:string"),
                ("integer", r#"{"value": 42}"#, "schema:integer"),
                ("number", r#"{"value": 3.14}"#, "schema:number"),
                ("boolean", r#"{"value": true}"#, "schema:boolean"),
                ("array", r#"{"value": [1, 2, 3]}"#, "schema:array"),
                ("object", r#"{"value": {"nested": "data"}}"#, "schema:object"),
            ];
            for (type_name, body_str, check_name) in types {
                self.checks.push(ConformanceCheck {
                    name: check_name.to_string(),
                    method: Method::POST,
                    path: format!("/conformance/schema/{}", type_name),
                    headers: self.merge_headers(vec![(
                        "Content-Type".to_string(),
                        "application/json".to_string(),
                    )]),
                    body: Some(CheckBody::Json(
                        serde_json::from_str(body_str).expect("valid JSON"),
                    )),
                    validation: CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                });
            }
        }

        // --- Composition ---
        if self.config.should_include_category("Composition") {
            let compositions = [
                ("oneOf", r#"{"type": "string", "value": "test"}"#, "composition:oneOf"),
                ("anyOf", r#"{"value": "test"}"#, "composition:anyOf"),
                ("allOf", r#"{"name": "test", "id": 1}"#, "composition:allOf"),
            ];
            for (kind, body_str, check_name) in compositions {
                self.checks.push(ConformanceCheck {
                    name: check_name.to_string(),
                    method: Method::POST,
                    path: format!("/conformance/composition/{}", kind),
                    headers: self.merge_headers(vec![(
                        "Content-Type".to_string(),
                        "application/json".to_string(),
                    )]),
                    body: Some(CheckBody::Json(
                        serde_json::from_str(body_str).expect("valid JSON"),
                    )),
                    validation: CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                });
            }
        }

        // --- String Formats ---
        if self.config.should_include_category("String Formats") {
            let formats = [
                ("date", r#"{"value": "2024-01-15"}"#, "format:date"),
                ("date-time", r#"{"value": "2024-01-15T10:30:00Z"}"#, "format:date-time"),
                ("email", r#"{"value": "test@example.com"}"#, "format:email"),
                ("uuid", r#"{"value": "550e8400-e29b-41d4-a716-446655440000"}"#, "format:uuid"),
                ("uri", r#"{"value": "https://example.com/path"}"#, "format:uri"),
                ("ipv4", r#"{"value": "192.168.1.1"}"#, "format:ipv4"),
                ("ipv6", r#"{"value": "::1"}"#, "format:ipv6"),
            ];
            for (fmt, body_str, check_name) in formats {
                self.checks.push(ConformanceCheck {
                    name: check_name.to_string(),
                    method: Method::POST,
                    path: format!("/conformance/formats/{}", fmt),
                    headers: self.merge_headers(vec![(
                        "Content-Type".to_string(),
                        "application/json".to_string(),
                    )]),
                    body: Some(CheckBody::Json(
                        serde_json::from_str(body_str).expect("valid JSON"),
                    )),
                    validation: CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                });
            }
        }

        // --- Constraints ---
        if self.config.should_include_category("Constraints") {
            let constraints = [
                ("required", r#"{"required_field": "present"}"#, "constraint:required"),
                ("optional", r#"{}"#, "constraint:optional"),
                ("minmax", r#"{"value": 50}"#, "constraint:minmax"),
                ("pattern", r#"{"value": "ABC-123"}"#, "constraint:pattern"),
                ("enum", r#"{"status": "active"}"#, "constraint:enum"),
            ];
            for (kind, body_str, check_name) in constraints {
                self.checks.push(ConformanceCheck {
                    name: check_name.to_string(),
                    method: Method::POST,
                    path: format!("/conformance/constraints/{}", kind),
                    headers: self.merge_headers(vec![(
                        "Content-Type".to_string(),
                        "application/json".to_string(),
                    )]),
                    body: Some(CheckBody::Json(
                        serde_json::from_str(body_str).expect("valid JSON"),
                    )),
                    validation: CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                });
            }
        }

        // --- Response Codes ---
        if self.config.should_include_category("Response Codes") {
            for (code_str, check_name) in [
                ("200", "response:200"),
                ("201", "response:201"),
                ("204", "response:204"),
                ("400", "response:400"),
                ("404", "response:404"),
            ] {
                let code: u16 = code_str.parse().unwrap();
                self.checks.push(ConformanceCheck {
                    name: check_name.to_string(),
                    method: Method::GET,
                    path: format!("/conformance/responses/{}", code_str),
                    headers: self.custom_headers_only(),
                    body: None,
                    validation: CheckValidation::ExactStatus(code),
                });
            }
        }

        // --- HTTP Methods ---
        if self.config.should_include_category("HTTP Methods") {
            self.add_ref_get("method:GET", "/conformance/methods");
            for (method, check_name) in [
                (Method::POST, "method:POST"),
                (Method::PUT, "method:PUT"),
                (Method::PATCH, "method:PATCH"),
            ] {
                self.checks.push(ConformanceCheck {
                    name: check_name.to_string(),
                    method,
                    path: "/conformance/methods".to_string(),
                    headers: self.merge_headers(vec![(
                        "Content-Type".to_string(),
                        "application/json".to_string(),
                    )]),
                    body: Some(CheckBody::Json(serde_json::json!({"action": "test"}))),
                    validation: CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                });
            }
            for (method, check_name) in [
                (Method::DELETE, "method:DELETE"),
                (Method::HEAD, "method:HEAD"),
                (Method::OPTIONS, "method:OPTIONS"),
            ] {
                self.checks.push(ConformanceCheck {
                    name: check_name.to_string(),
                    method,
                    path: "/conformance/methods".to_string(),
                    headers: self.custom_headers_only(),
                    body: None,
                    validation: CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                });
            }
        }

        // --- Content Types ---
        if self.config.should_include_category("Content Types") {
            self.checks.push(ConformanceCheck {
                name: "content:negotiation".to_string(),
                method: Method::GET,
                path: "/conformance/content-types".to_string(),
                headers: self
                    .merge_headers(vec![("Accept".to_string(), "application/json".to_string())]),
                body: None,
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });
        }

        // --- Security ---
        if self.config.should_include_category("Security") {
            // Bearer
            self.checks.push(ConformanceCheck {
                name: "security:bearer".to_string(),
                method: Method::GET,
                path: "/conformance/security/bearer".to_string(),
                headers: self.merge_headers(vec![(
                    "Authorization".to_string(),
                    "Bearer test-token-123".to_string(),
                )]),
                body: None,
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });

            // API Key
            let api_key = self.config.api_key.as_deref().unwrap_or("test-api-key-123");
            self.checks.push(ConformanceCheck {
                name: "security:apikey".to_string(),
                method: Method::GET,
                path: "/conformance/security/apikey".to_string(),
                headers: self.merge_headers(vec![("X-API-Key".to_string(), api_key.to_string())]),
                body: None,
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });

            // Basic auth
            let basic_creds = self.config.basic_auth.as_deref().unwrap_or("user:pass");
            use base64::Engine;
            let encoded = base64::engine::general_purpose::STANDARD.encode(basic_creds.as_bytes());
            self.checks.push(ConformanceCheck {
                name: "security:basic".to_string(),
                method: Method::GET,
                path: "/conformance/security/basic".to_string(),
                headers: self.merge_headers(vec![(
                    "Authorization".to_string(),
                    format!("Basic {}", encoded),
                )]),
                body: None,
                validation: CheckValidation::StatusRange {
                    min: 200,
                    max_exclusive: 500,
                },
            });
        }

        self
    }

    /// Populate checks from annotated spec operations (spec-driven mode)
    #[must_use]
    pub fn with_spec_driven_checks(mut self, operations: &[AnnotatedOperation]) -> Self {
        // Track which features have been seen to deduplicate in default mode
        let mut feature_seen: HashSet<&'static str> = HashSet::new();

        for op in operations {
            for feature in &op.features {
                let category = feature.category();
                if !self.config.should_include_category(category) {
                    continue;
                }

                let check_name_base = feature.check_name();

                if self.config.all_operations {
                    // All-operations mode: test every operation with path-qualified names
                    let check_name = format!("{}:{}", check_name_base, op.path);
                    let check = self.build_spec_check(&check_name, op, feature);
                    self.checks.push(check);
                } else {
                    // Default mode: one representative operation per feature
                    if feature_seen.insert(check_name_base) {
                        let check_name = format!("{}:{}", check_name_base, op.path);
                        let check = self.build_spec_check(&check_name, op, feature);
                        self.checks.push(check);
                    }
                }
            }
        }

        self
    }

    /// Load custom checks from the configured YAML file
    pub fn with_custom_checks(self) -> Result<Self> {
        let path = match &self.config.custom_checks_file {
            Some(p) => p.clone(),
            None => return Ok(self),
        };
        let custom_config = CustomConformanceConfig::from_file(&path)?;
        self.append_custom_checks(&custom_config)
    }

    /// Load custom checks from an already-parsed `CustomConformanceConfig`.
    ///
    /// Counterpart to [`Self::with_custom_checks`] for callers that
    /// don't have a filesystem path — the cloud test-runner receives
    /// the YAML inline on the suite config and parses it server-side
    /// before reaching the executor, so it can't (and shouldn't) write
    /// the bytes to a tempfile just to satisfy a file-based API.
    pub fn with_custom_checks_from_config(
        self,
        custom_config: CustomConformanceConfig,
    ) -> Result<Self> {
        self.append_custom_checks(&custom_config)
    }

    /// Shared implementation: filter + add a parsed
    /// `CustomConformanceConfig`'s entries onto the check list.
    /// Pulled out of `with_custom_checks` so the inline-config and
    /// file-based paths can't drift.
    fn append_custom_checks(mut self, custom_config: &CustomConformanceConfig) -> Result<Self> {
        let filter_re = match &self.config.custom_filter {
            Some(pattern) => Some(regex::Regex::new(pattern).map_err(|e| {
                BenchError::Other(format!("Invalid --conformance-custom-filter regex: {}", e))
            })?),
            None => None,
        };

        let mut included = 0usize;
        let total = custom_config.custom_checks.len();
        // Round 38 — propagate the chain-iteration count from the YAML
        // into the executor. Saturates to `1` when the YAML omits the
        // field, matching the existing single-pass behaviour.
        self.chain_iterations = custom_config.chain_iterations.max(1);
        for check in &custom_config.custom_checks {
            if let Some(ref re) = filter_re {
                if !re.is_match(&check.name) && !re.is_match(&check.path) {
                    continue;
                }
            }
            self.add_custom_check(check);
            included += 1;
        }

        if filter_re.is_some() {
            tracing::info!("Custom check filter: {}/{} checks matched pattern", included, total);
        }

        Ok(self)
    }

    /// Return the number of checks that will be executed
    pub fn check_count(&self) -> usize {
        self.checks.len()
    }

    /// Execute all checks and return a `ConformanceReport`
    pub async fn execute(&self) -> Result<ConformanceReport> {
        let chain_iters = self.chain_iterations.max(1);
        let mut results = Vec::with_capacity(self.checks.len() * chain_iters as usize);
        let delay = self.config.request_delay_ms;

        for _iter in 0..chain_iters {
            // Round 38 (#79) — every iteration starts with a fresh
            // chain context so captures from iteration K do not leak
            // into K+1. This is what Srikanth wants for repeated
            // login + work + logout cycles.
            let mut ctx = ChainContext::default();
            for (i, check) in self.checks.iter().enumerate() {
                if delay > 0 && i > 0 {
                    tokio::time::sleep(Duration::from_millis(delay)).await;
                }
                if let Some(meta) = self.chain_meta.get(&i).cloned() {
                    results.extend(self.execute_chain_check(check, &meta, &mut ctx).await);
                } else {
                    results.push(self.execute_check(check).await);
                }
            }
        }

        // Write request log if --export-requests was set
        if self.config.export_requests {
            if let Some(ref output_dir) = self.config.output_dir {
                let request_log: Vec<_> = results
                    .iter()
                    .filter_map(|r| {
                        r.captured.as_ref().map(|c| {
                            serde_json::json!({
                                "check": r.name,
                                "passed": r.passed,
                                "request": {
                                    "method": c.method,
                                    "url": c.url,
                                    "headers": c.request_headers,
                                    "body": c.request_body,
                                },
                                "response": {
                                    "status": c.response_status,
                                    "headers": c.response_headers,
                                    "body": c.response_body,
                                },
                            })
                        })
                    })
                    .collect();
                let path = output_dir.join("conformance-requests.json");
                if let Ok(json) = serde_json::to_string_pretty(&request_log) {
                    let _ = std::fs::write(&path, json);
                    tracing::info!(
                        "Exported {} request/response pairs to {}",
                        request_log.len(),
                        path.display()
                    );
                }
            }
        }

        // Round 46 (#79) — drain the wire-level network-events sink
        // into `conformance-network-events.json` so the user can see
        // every connect / timeout / TLS failure with a timestamp + the
        // classified `kind` field. Empty file when the run had no
        // wire failures (cleanest signal that connectivity stayed up).
        if let Some(ref output_dir) = self.config.output_dir {
            if let Ok(guard) = self.network_events.lock() {
                if !guard.is_empty() {
                    let path = output_dir.join("conformance-network-events.json");
                    if let Ok(json) = serde_json::to_string_pretty(&*guard) {
                        let _ = std::fs::write(&path, json);
                        tracing::warn!(
                            "Recorded {} wire-level network event(s) to {} — see file for timestamps and classified reasons",
                            guard.len(),
                            path.display()
                        );
                    }
                }
            }
        }

        Ok(Self::aggregate(results))
    }

    /// Execute all checks with progress events sent to the channel
    pub async fn execute_with_progress(
        &self,
        tx: mpsc::Sender<ConformanceProgress>,
    ) -> Result<ConformanceReport> {
        let chain_iters = self.chain_iterations.max(1);
        let total = self.checks.len() * chain_iters as usize;
        let delay = self.config.request_delay_ms;
        let _ = tx
            .send(ConformanceProgress::Started {
                total_checks: total,
            })
            .await;

        let mut results = Vec::with_capacity(total);

        for _iter in 0..chain_iters {
            let mut ctx = ChainContext::default();
            for (i, check) in self.checks.iter().enumerate() {
                if delay > 0 && i > 0 {
                    tokio::time::sleep(Duration::from_millis(delay)).await;
                }
                let new_results = if let Some(meta) = self.chain_meta.get(&i).cloned() {
                    self.execute_chain_check(check, &meta, &mut ctx).await
                } else {
                    vec![self.execute_check(check).await]
                };
                for result in new_results {
                    let passed = result.passed;
                    let name = result.name.clone();
                    results.push(result);
                    let _ = tx
                        .send(ConformanceProgress::CheckCompleted {
                            name,
                            passed,
                            checks_done: results.len(),
                        })
                        .await;
                }
            }
        }

        let _ = tx.send(ConformanceProgress::Finished).await;
        Ok(Self::aggregate(results))
    }

    /// Execute a single check
    async fn execute_check(&self, check: &ConformanceCheck) -> CheckResult {
        let base_url = self.config.effective_base_url();
        let url = format!("{}{}", base_url.trim_end_matches('/'), check.path);

        let mut request = self.client.request(check.method.clone(), &url);

        // Add headers
        for (name, value) in &check.headers {
            request = request.header(name.as_str(), value.as_str());
        }

        // Add body
        match &check.body {
            Some(CheckBody::Json(value)) => {
                request = request.json(value);
            }
            Some(CheckBody::FormUrlencoded(fields)) => {
                request = request.form(fields);
            }
            Some(CheckBody::Raw {
                content,
                content_type,
            }) => {
                // For multipart, use the multipart API
                if content_type == "text/plain" && check.path.contains("multipart") {
                    let part = reqwest::multipart::Part::bytes(content.as_bytes().to_vec())
                        .file_name("test.txt")
                        .mime_str(content_type)
                        .unwrap_or_else(|_| {
                            reqwest::multipart::Part::bytes(content.as_bytes().to_vec())
                        });
                    let form = reqwest::multipart::Form::new().part("field", part);
                    request = request.multipart(form);
                } else {
                    request =
                        request.header("Content-Type", content_type.as_str()).body(content.clone());
                }
            }
            // Round 38 (#79) — file-upload via multipart/form-data.
            // One reqwest `Part` per declared upload, all merged into a
            // single `Form`. `mime_str` rejects malformed Content-Types
            // (e.g. "application / json" with spaces); fall back to
            // octet-stream so the request still goes out and the
            // server can decide what to do with the bytes.
            Some(CheckBody::Multipart { parts }) => {
                let mut form = reqwest::multipart::Form::new();
                for part_spec in parts {
                    let mut part = reqwest::multipart::Part::bytes(part_spec.bytes.clone())
                        .file_name(part_spec.filename.clone());
                    part = match part.mime_str(&part_spec.content_type) {
                        Ok(p) => p,
                        Err(_) => reqwest::multipart::Part::bytes(part_spec.bytes.clone())
                            .file_name(part_spec.filename.clone())
                            .mime_str("application/octet-stream")
                            .expect("application/octet-stream is a valid MIME type"),
                    };
                    form = form.part(part_spec.field_name.clone(), part);
                }
                request = request.multipart(form);
            }
            None => {}
        }

        let req_body_str = match &check.body {
            Some(CheckBody::Json(v)) => v.to_string(),
            Some(CheckBody::FormUrlencoded(f)) => {
                f.iter().map(|(k, v)| format!("{}={}", k, v)).collect::<Vec<_>>().join("&")
            }
            Some(CheckBody::Raw { content, .. }) => content.clone(),
            // Round 38 — for `--export-requests`, write a brief
            // multipart summary (`<N files: a.jpg (image/jpeg, 1234
            // bytes), b.json (application/json, 56 bytes)>`) instead
            // of the raw multipart envelope (which would be megabytes
            // for real file uploads and not useful in a JSON capture
            // anyway).
            Some(CheckBody::Multipart { parts }) => {
                let summary: Vec<String> = parts
                    .iter()
                    .map(|p| {
                        format!("{} ({}, {} bytes)", p.filename, p.content_type, p.bytes.len())
                    })
                    .collect();
                format!("<{} file(s): {}>", parts.len(), summary.join(", "))
            }
            None => String::new(),
        };

        let response = match request.send().await {
            Ok(resp) => resp,
            Err(e) => {
                // Round 46 (#79) — Srikanth on 0.3.190 Q3: "Is there a
                // way or logs in mockforge client to understand
                // timestamp range of traffic drops and client reason
                // for traffic drop (network reachability, duplicate
                // ip, choking, congestion etc)". Classify the
                // reqwest::Error into a coarse `kind` (connect /
                // timeout / tls / decode / body / other) and push it
                // to the run's network-events sink so the user can
                // grep `conformance-network-events.json` for what
                // went wrong on the wire and when.
                let kind = if e.is_connect() {
                    "connect"
                } else if e.is_timeout() {
                    "timeout"
                } else if e.is_request() {
                    "request"
                } else if e.is_body() {
                    "body"
                } else if e.is_decode() {
                    "decode"
                } else if format!("{}", e).to_ascii_lowercase().contains("tls") {
                    "tls"
                } else {
                    "other"
                };
                self.record_network_event(NetworkEvent {
                    timestamp: chrono::Utc::now(),
                    check: check.name.clone(),
                    method: check.method.to_string(),
                    url: url.clone(),
                    kind: kind.to_string(),
                    message: format!("{}", e),
                });
                return CheckResult {
                    name: check.name.clone(),
                    passed: false,
                    failure_detail: Some(FailureDetail {
                        check: check.name.clone(),
                        request: FailureRequest {
                            method: check.method.to_string(),
                            url: url.clone(),
                            headers: HashMap::new(),
                            body: String::new(),
                        },
                        response: FailureResponse {
                            status: 0,
                            headers: HashMap::new(),
                            body: format!("Request failed ({}): {}", kind, e),
                        },
                        expected: format!("{:?}", check.validation),
                        schema_violations: Vec::new(),
                    }),
                    captured: None,
                };
            }
        };

        let status = response.status().as_u16();
        let resp_headers: HashMap<String, String> = response
            .headers()
            .iter()
            .map(|(k, v)| (k.to_string(), v.to_str().unwrap_or("").to_string()))
            .collect();
        let resp_body = response.text().await.unwrap_or_default();

        let (passed, schema_violations) =
            self.validate_response(&check.validation, status, &resp_headers, &resp_body);

        // Capture the exchange when export_requests is on OR when any
        // check in this run declared chain semantics (extract /
        // repeat). The chain executor needs the response headers and
        // body to extract captured values — without `captured` the
        // chain context can't populate `${cookie:...}` /
        // `${var:...}`. Round 38 (#79).
        let need_capture = self.config.export_requests || !self.chain_meta.is_empty();
        let captured = if need_capture {
            Some(CapturedExchange {
                method: check.method.to_string(),
                url: url.clone(),
                request_headers: check.headers.iter().cloned().collect(),
                // Round 45 (#79) — Srikanth on 0.3.189: showed a 13MB
                // multipart upload getting cut mid-PEM at the 2000-byte
                // cap. Bump to 64KB so a single PEM cert + headers fits
                // inline and we still get the boundary chain for visual
                // confirmation. Append a marker reporting the original
                // size so a downstream consumer can tell a truncation
                // from a full payload.
                request_body: if req_body_str.len() > 65536 {
                    format!(
                        "{}\n<truncated at 65536 bytes; full body was {} bytes>",
                        &req_body_str[..65536],
                        req_body_str.len()
                    )
                } else {
                    req_body_str
                },
                response_status: status,
                response_headers: resp_headers.clone(),
                response_body: if resp_body.len() > 65536 {
                    format!(
                        "{}\n<truncated at 65536 bytes; full body was {} bytes>",
                        &resp_body[..65536],
                        resp_body.len()
                    )
                } else {
                    resp_body.clone()
                },
            })
        } else {
            None
        };

        let failure_detail = if !passed {
            Some(FailureDetail {
                check: check.name.clone(),
                request: FailureRequest {
                    method: check.method.to_string(),
                    url,
                    headers: check.headers.iter().cloned().collect(),
                    body: match &check.body {
                        Some(CheckBody::Json(v)) => v.to_string(),
                        Some(CheckBody::FormUrlencoded(f)) => f
                            .iter()
                            .map(|(k, v)| format!("{}={}", k, v))
                            .collect::<Vec<_>>()
                            .join("&"),
                        Some(CheckBody::Raw { content, .. }) => content.clone(),
                        // Round 38 — same brief summary used by the
                        // export path; keeps failure detail readable
                        // without dumping multi-MB upload bytes.
                        Some(CheckBody::Multipart { parts }) => {
                            format!("<{} multipart file(s)>", parts.len())
                        }
                        None => String::new(),
                    },
                },
                response: FailureResponse {
                    status,
                    headers: resp_headers,
                    body: if resp_body.len() > 500 {
                        format!("{}...", &resp_body[..500])
                    } else {
                        resp_body
                    },
                },
                expected: Self::describe_validation(&check.validation),
                schema_violations,
            })
        } else {
            None
        };

        CheckResult {
            name: check.name.clone(),
            passed,
            failure_detail,
            captured,
        }
    }

    /// Round 38 (#79) — execute a custom check with chain semantics:
    /// substitute captured values from `ctx` into the request, run
    /// the configured repeat (sequential or parallel), and pour any
    /// `extract`-matched response data back into `ctx` for the next
    /// check to use. The first response's data is the one that
    /// becomes visible to extract; under `parallel` repeat the
    /// captures from the racing requests would be ambiguous so we
    /// pull only from the first to finish.
    ///
    /// Returns a vector because a `repeat.count > 1` produces N
    /// `CheckResult`s, all of which need to flow through the aggregate.
    async fn execute_chain_check(
        &self,
        check: &ConformanceCheck,
        meta: &ChainMeta,
        ctx: &mut ChainContext,
    ) -> Vec<CheckResult> {
        let substituted = apply_chain_context(check, ctx);
        let count = meta.repeat.count.max(1);
        let results = match meta.repeat.mode {
            super::custom::RepeatMode::Sequential => {
                let mut out = Vec::with_capacity(count as usize);
                for _ in 0..count {
                    out.push(self.execute_check(&substituted).await);
                }
                out
            }
            super::custom::RepeatMode::Parallel => {
                let futs = (0..count).map(|_| self.execute_check(&substituted));
                futures::future::join_all(futs).await
            }
        };

        // Extract from the first response. Under sequential repeat
        // this is the first request fired; under parallel it's the
        // first slot in the result array, which join_all preserves
        // by input order (not completion order), so the extraction
        // is at least deterministic.
        if !meta.extract.is_empty() {
            if let Some(first) = results.first() {
                if let Some(captured) = &first.captured {
                    extract_into_context(
                        &meta.extract,
                        &captured.response_headers,
                        &captured.response_body,
                        ctx,
                    );
                }
            }
        }
        results
    }

    /// Validate a response against the check's validation rules.
    ///
    /// Returns `(passed, schema_violations)` where `schema_violations` contains
    /// field-level details when a `SchemaValidation` check fails.
    fn validate_response(
        &self,
        validation: &CheckValidation,
        status: u16,
        headers: &HashMap<String, String>,
        body: &str,
    ) -> (bool, Vec<SchemaViolation>) {
        match validation {
            CheckValidation::StatusRange { min, max_exclusive } => {
                (status >= *min && status < *max_exclusive, Vec::new())
            }
            CheckValidation::ExactStatus(expected) => (status == *expected, Vec::new()),
            CheckValidation::SchemaValidation {
                status_min,
                status_max,
                schema,
            } => {
                if status < *status_min || status >= *status_max {
                    return (false, Vec::new());
                }
                // Parse body as JSON and validate against schema
                let Ok(body_value) = serde_json::from_str::<serde_json::Value>(body) else {
                    return (
                        false,
                        vec![SchemaViolation {
                            field_path: "/".to_string(),
                            violation_type: "parse_error".to_string(),
                            expected: "valid JSON".to_string(),
                            actual: "non-JSON response body".to_string(),
                        }],
                    );
                };
                match jsonschema::validator_for(schema) {
                    Ok(validator) => {
                        let errors: Vec<_> = validator.iter_errors(&body_value).collect();
                        if errors.is_empty() {
                            (true, Vec::new())
                        } else {
                            let violations = errors
                                .iter()
                                .map(|err| {
                                    let field_path = err.instance_path.to_string();
                                    let field_path = if field_path.is_empty() {
                                        "/".to_string()
                                    } else {
                                        field_path
                                    };
                                    SchemaViolation {
                                        field_path,
                                        violation_type: format!("{:?}", err.kind)
                                            .split('(')
                                            .next()
                                            .unwrap_or("unknown")
                                            .split('{')
                                            .next()
                                            .unwrap_or("unknown")
                                            .split(' ')
                                            .next()
                                            .unwrap_or("unknown")
                                            .trim()
                                            .to_string(),
                                        expected: {
                                            // Extract human-readable expected value from the error.
                                            // The schema_path is like "/properties/field/type" —
                                            // extract the last meaningful segment instead.
                                            let schema_str = format!("{}", err.schema_path);
                                            match &err.kind {
                                                jsonschema::error::ValidationErrorKind::Type { kind } => {
                                                    format!("type: {:?}", kind)
                                                }
                                                jsonschema::error::ValidationErrorKind::Required { property } => {
                                                    format!("required field: {}", property)
                                                }
                                                _ => {
                                                    // For other kinds, use last path segment
                                                    schema_str
                                                        .rsplit('/')
                                                        .next()
                                                        .unwrap_or(&schema_str)
                                                        .to_string()
                                                }
                                            }
                                        },
                                        actual: format!("{}", err),
                                    }
                                })
                                .collect();
                            (false, violations)
                        }
                    }
                    Err(_) => {
                        // Schema compilation failed — fall back to is_valid behavior
                        (
                            false,
                            vec![SchemaViolation {
                                field_path: "/".to_string(),
                                violation_type: "schema_compile_error".to_string(),
                                expected: "valid JSON schema".to_string(),
                                actual: "schema failed to compile".to_string(),
                            }],
                        )
                    }
                }
            }
            CheckValidation::Custom {
                expected_status,
                expected_headers,
                expected_body_fields,
            } => {
                if status != *expected_status {
                    return (false, Vec::new());
                }
                // Check headers with regex
                for (header_name, pattern) in expected_headers {
                    let header_val = headers
                        .get(header_name)
                        .or_else(|| headers.get(&header_name.to_lowercase()))
                        .map(|s| s.as_str())
                        .unwrap_or("");
                    if let Ok(re) = regex::Regex::new(pattern) {
                        if !re.is_match(header_val) {
                            return (false, Vec::new());
                        }
                    }
                }
                // Check body field types
                if !expected_body_fields.is_empty() {
                    let Ok(body_value) = serde_json::from_str::<serde_json::Value>(body) else {
                        return (false, Vec::new());
                    };
                    for (field_name, field_type) in expected_body_fields {
                        let field = &body_value[field_name];
                        let ok = match field_type.as_str() {
                            "string" => field.is_string(),
                            "integer" => field.is_i64() || field.is_u64(),
                            "number" => field.is_number(),
                            "boolean" => field.is_boolean(),
                            "array" => field.is_array(),
                            "object" => field.is_object(),
                            _ => !field.is_null(),
                        };
                        if !ok {
                            return (false, Vec::new());
                        }
                    }
                }
                (true, Vec::new())
            }
        }
    }

    /// Human-readable validation description for failure reports
    fn describe_validation(validation: &CheckValidation) -> String {
        match validation {
            CheckValidation::StatusRange { min, max_exclusive } => {
                format!("status >= {} && status < {}", min, max_exclusive)
            }
            CheckValidation::ExactStatus(code) => format!("status === {}", code),
            CheckValidation::SchemaValidation {
                status_min,
                status_max,
                ..
            } => {
                format!("status >= {} && status < {} + schema validation", status_min, status_max)
            }
            CheckValidation::Custom {
                expected_status, ..
            } => {
                format!("status === {}", expected_status)
            }
        }
    }

    /// Aggregate check results into a `ConformanceReport`
    fn aggregate(results: Vec<CheckResult>) -> ConformanceReport {
        let mut check_results: HashMap<String, (u64, u64)> = HashMap::new();
        let mut failure_details = Vec::new();

        for result in results {
            let entry = check_results.entry(result.name.clone()).or_insert((0, 0));
            if result.passed {
                entry.0 += 1;
            } else {
                entry.1 += 1;
            }
            if let Some(detail) = result.failure_detail {
                failure_details.push(detail);
            }
        }

        ConformanceReport::from_results(check_results, failure_details)
    }

    // --- Helper methods ---

    /// Build a spec-driven check from an annotated operation and feature
    fn build_spec_check(
        &self,
        check_name: &str,
        op: &AnnotatedOperation,
        feature: &ConformanceFeature,
    ) -> ConformanceCheck {
        // Build URL path with parameters substituted
        let mut url_path = op.path.clone();
        for (name, value) in &op.path_params {
            url_path = url_path.replace(&format!("{{{}}}", name), value);
        }
        // Append query params
        if !op.query_params.is_empty() {
            let qs: Vec<String> =
                op.query_params.iter().map(|(k, v)| format!("{}={}", k, v)).collect();
            url_path = format!("{}?{}", url_path, qs.join("&"));
        }

        // Build effective headers
        let mut effective_headers = self.effective_headers(&op.header_params);

        // For non-default response codes, add mock server header
        if matches!(feature, ConformanceFeature::Response400 | ConformanceFeature::Response404) {
            let code = match feature {
                ConformanceFeature::Response400 => "400",
                ConformanceFeature::Response404 => "404",
                _ => unreachable!(),
            };
            effective_headers.push(("X-Mockforge-Response-Status".to_string(), code.to_string()));
        }

        // Inject auth headers for security checks or secured endpoints
        let needs_auth = matches!(
            feature,
            ConformanceFeature::SecurityBearer
                | ConformanceFeature::SecurityBasic
                | ConformanceFeature::SecurityApiKey
        ) || !op.security_schemes.is_empty();

        if needs_auth {
            self.inject_security_headers(&op.security_schemes, &mut effective_headers);
        }

        // Determine method
        let method = match op.method.as_str() {
            "GET" => Method::GET,
            "POST" => Method::POST,
            "PUT" => Method::PUT,
            "PATCH" => Method::PATCH,
            "DELETE" => Method::DELETE,
            "HEAD" => Method::HEAD,
            "OPTIONS" => Method::OPTIONS,
            _ => Method::GET,
        };

        // Determine body
        let body = match method {
            Method::POST | Method::PUT | Method::PATCH => {
                if let Some(sample) = &op.sample_body {
                    // Add Content-Type if not present
                    let content_type =
                        op.request_body_content_type.as_deref().unwrap_or("application/json");
                    if !effective_headers
                        .iter()
                        .any(|(k, _)| k.eq_ignore_ascii_case("content-type"))
                    {
                        effective_headers
                            .push(("Content-Type".to_string(), content_type.to_string()));
                    }
                    match content_type {
                        "application/x-www-form-urlencoded" => {
                            // Parse as form fields
                            let fields: Vec<(String, String)> = serde_json::from_str::<
                                serde_json::Value,
                            >(
                                sample
                            )
                            .ok()
                            .and_then(|v| {
                                v.as_object().map(|obj| {
                                    obj.iter()
                                        .map(|(k, v)| {
                                            (k.clone(), v.as_str().unwrap_or("").to_string())
                                        })
                                        .collect()
                                })
                            })
                            .unwrap_or_default();
                            Some(CheckBody::FormUrlencoded(fields))
                        }
                        _ => {
                            // Try JSON, fall back to raw
                            match serde_json::from_str::<serde_json::Value>(sample) {
                                Ok(v) => Some(CheckBody::Json(v)),
                                Err(_) => Some(CheckBody::Raw {
                                    content: sample.clone(),
                                    content_type: content_type.to_string(),
                                }),
                            }
                        }
                    }
                } else {
                    None
                }
            }
            _ => None,
        };

        // Determine validation
        let validation = self.determine_validation(feature, op);

        ConformanceCheck {
            name: check_name.to_string(),
            method,
            path: url_path,
            headers: effective_headers,
            body,
            validation,
        }
    }

    /// Determine validation strategy based on the conformance feature
    fn determine_validation(
        &self,
        feature: &ConformanceFeature,
        op: &AnnotatedOperation,
    ) -> CheckValidation {
        match feature {
            ConformanceFeature::Response200 => CheckValidation::ExactStatus(200),
            ConformanceFeature::Response201 => CheckValidation::ExactStatus(201),
            ConformanceFeature::Response204 => CheckValidation::ExactStatus(204),
            ConformanceFeature::Response400 => CheckValidation::ExactStatus(400),
            ConformanceFeature::Response404 => CheckValidation::ExactStatus(404),
            ConformanceFeature::SecurityBearer
            | ConformanceFeature::SecurityBasic
            | ConformanceFeature::SecurityApiKey => CheckValidation::StatusRange {
                min: 200,
                max_exclusive: 400,
            },
            ConformanceFeature::ResponseValidation => {
                if let Some(schema) = &op.response_schema {
                    // Convert openapiv3 Schema to JSON Schema value for jsonschema crate
                    let schema_json = openapi_schema_to_json_schema(schema);
                    CheckValidation::SchemaValidation {
                        status_min: 200,
                        status_max: 500,
                        schema: schema_json,
                    }
                } else {
                    CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    }
                }
            }
            _ => CheckValidation::StatusRange {
                min: 200,
                max_exclusive: 500,
            },
        }
    }

    /// Add a simple GET reference check with default status range validation
    fn add_ref_get(&mut self, name: &str, path: &str) {
        self.checks.push(ConformanceCheck {
            name: name.to_string(),
            method: Method::GET,
            path: path.to_string(),
            headers: self.custom_headers_only(),
            body: None,
            validation: CheckValidation::StatusRange {
                min: 200,
                max_exclusive: 500,
            },
        });
    }

    /// Merge spec-derived headers with custom headers (custom overrides spec)
    fn effective_headers(&self, spec_headers: &[(String, String)]) -> Vec<(String, String)> {
        let mut headers = Vec::new();
        for (k, v) in spec_headers {
            // Skip if custom headers override this one
            if self.config.custom_headers.iter().any(|(ck, _)| ck.eq_ignore_ascii_case(k)) {
                continue;
            }
            headers.push((k.clone(), v.clone()));
        }
        // Append custom headers
        headers.extend(self.config.custom_headers.clone());
        headers
    }

    /// Merge provided headers with custom headers
    fn merge_headers(&self, mut headers: Vec<(String, String)>) -> Vec<(String, String)> {
        for (k, v) in &self.config.custom_headers {
            if !headers.iter().any(|(hk, _)| hk.eq_ignore_ascii_case(k)) {
                headers.push((k.clone(), v.clone()));
            }
        }
        headers
    }

    /// Return only custom headers (for checks that don't have spec-derived headers)
    fn custom_headers_only(&self) -> Vec<(String, String)> {
        self.config.custom_headers.clone()
    }

    /// Inject security headers based on resolved security schemes.
    /// If the user provides a Cookie header via --conformance-header, skip automatic
    /// Authorization headers (Bearer/Basic) since the user manages their own auth.
    fn inject_security_headers(
        &self,
        schemes: &[SecuritySchemeInfo],
        headers: &mut Vec<(String, String)>,
    ) {
        // If user provides Cookie header, they're using session-based auth — skip auto auth
        let has_cookie_auth =
            self.config.custom_headers.iter().any(|(k, _)| k.eq_ignore_ascii_case("Cookie"));
        let mut to_add: Vec<(String, String)> = Vec::new();

        for scheme in schemes {
            match scheme {
                SecuritySchemeInfo::Bearer => {
                    if !has_cookie_auth
                        && !Self::header_present(
                            "Authorization",
                            headers,
                            &self.config.custom_headers,
                        )
                    {
                        to_add.push((
                            "Authorization".to_string(),
                            "Bearer mockforge-conformance-test-token".to_string(),
                        ));
                    }
                }
                SecuritySchemeInfo::Basic => {
                    if !has_cookie_auth
                        && !Self::header_present(
                            "Authorization",
                            headers,
                            &self.config.custom_headers,
                        )
                    {
                        let creds = self.config.basic_auth.as_deref().unwrap_or("test:test");
                        use base64::Engine;
                        let encoded =
                            base64::engine::general_purpose::STANDARD.encode(creds.as_bytes());
                        to_add.push(("Authorization".to_string(), format!("Basic {}", encoded)));
                    }
                }
                SecuritySchemeInfo::ApiKey { location, name } => match location {
                    ApiKeyLocation::Header => {
                        if !Self::header_present(name, headers, &self.config.custom_headers) {
                            let key = self
                                .config
                                .api_key
                                .as_deref()
                                .unwrap_or("mockforge-conformance-test-key");
                            to_add.push((name.clone(), key.to_string()));
                        }
                    }
                    ApiKeyLocation::Cookie => {
                        if !Self::header_present("Cookie", headers, &self.config.custom_headers) {
                            to_add.push((
                                "Cookie".to_string(),
                                format!("{}=mockforge-conformance-test-session", name),
                            ));
                        }
                    }
                    ApiKeyLocation::Query => {
                        // Handled in URL, not headers
                    }
                },
            }
        }

        headers.extend(to_add);
    }

    /// Check if a header name is present in either the existing headers or custom headers
    fn header_present(
        name: &str,
        headers: &[(String, String)],
        custom_headers: &[(String, String)],
    ) -> bool {
        headers.iter().any(|(h, _)| h.eq_ignore_ascii_case(name))
            || custom_headers.iter().any(|(h, _)| h.eq_ignore_ascii_case(name))
    }

    /// Add a custom check from YAML config
    fn add_custom_check(&mut self, check: &CustomCheck) {
        let method = match check.method.to_uppercase().as_str() {
            "GET" => Method::GET,
            "POST" => Method::POST,
            "PUT" => Method::PUT,
            "PATCH" => Method::PATCH,
            "DELETE" => Method::DELETE,
            "HEAD" => Method::HEAD,
            "OPTIONS" => Method::OPTIONS,
            _ => Method::GET,
        };

        // Build headers
        let mut headers: Vec<(String, String)> =
            check.headers.iter().map(|(k, v)| (k.clone(), v.clone())).collect();
        // Add global custom headers (check-specific take priority)
        for (k, v) in &self.config.custom_headers {
            if !check.headers.contains_key(k) {
                headers.push((k.clone(), v.clone()));
            }
        }
        // Add Content-Type for JSON body if not present
        if check.body.is_some()
            && !headers.iter().any(|(k, _)| k.eq_ignore_ascii_case("content-type"))
        {
            headers.push(("Content-Type".to_string(), "application/json".to_string()));
        }

        // Body. Round 38 (#79) — `body` wins over `upload` /
        // `uploads` when both are set; the YAML is a misconfiguration
        // and we warn rather than silently picking one. When `body`
        // is absent and `upload` / `uploads` is set, every file is
        // read off disk at construction time and folded into a
        // `CheckBody::Multipart`. The file read is *eager* (not at
        // request time) so the executor's send path stays purely
        // synchronous to the network and a missing file is surfaced
        // here, not mid-run.
        let upload_specs: Vec<&super::custom::UploadFile> =
            check.upload.as_ref().into_iter().chain(check.uploads.iter()).collect();
        let body = if check.body.is_some() {
            if !upload_specs.is_empty() {
                eprintln!(
                    "warning: custom check '{}' has both `body` and `upload`/`uploads`; ignoring uploads",
                    check.name
                );
            }
            check.body.as_ref().and_then(|b| {
                serde_json::from_str::<serde_json::Value>(b).ok().map(CheckBody::Json)
            })
        } else if !upload_specs.is_empty() {
            let mut parts = Vec::with_capacity(upload_specs.len());
            for spec in upload_specs {
                match std::fs::read(&spec.path) {
                    Ok(bytes) => {
                        let filename = spec.filename.clone().unwrap_or_else(|| {
                            std::path::Path::new(&spec.path)
                                .file_name()
                                .and_then(|n| n.to_str())
                                .unwrap_or("upload.bin")
                                .to_string()
                        });
                        parts.push(MultipartPart {
                            bytes,
                            content_type: spec.content_type.clone(),
                            field_name: spec.field_name.clone(),
                            filename,
                        });
                    }
                    Err(e) => {
                        eprintln!(
                            "warning: custom check '{}' could not read upload '{}': {}",
                            check.name, spec.path, e
                        );
                    }
                }
            }
            if parts.is_empty() {
                None
            } else {
                Some(CheckBody::Multipart { parts })
            }
        } else {
            None
        };

        // Build expected headers for validation
        let expected_headers: Vec<(String, String)> =
            check.expected_headers.iter().map(|(k, v)| (k.clone(), v.clone())).collect();

        // Build expected body fields
        let expected_body_fields: Vec<(String, String)> = check
            .expected_body_fields
            .iter()
            .map(|f| (f.name.clone(), f.field_type.clone()))
            .collect();

        // Round 38 (#79) — register chain metadata when the YAML
        // asked for capture / replay. Only non-default extract or
        // repeat blocks reach the chain map so the steady-state
        // (single-shot custom check) still skips the chain path.
        let needs_chain = !check.extract.is_empty() || !check.repeat.is_default();
        let next_index = self.checks.len();
        if needs_chain {
            self.chain_meta.insert(
                next_index,
                ChainMeta {
                    extract: check.extract.clone(),
                    repeat: check.repeat.clone(),
                },
            );
        }

        // Primary status check
        self.checks.push(ConformanceCheck {
            name: check.name.clone(),
            method,
            path: check.path.clone(),
            headers,
            body,
            validation: CheckValidation::Custom {
                expected_status: check.expected_status,
                expected_headers,
                expected_body_fields,
            },
        });
    }
}

/// Round 38 (#79) — return a clone of `check` with every
/// `${var:...}` / `${cookie:...}` / `${header:...}` token in `path`,
/// header values, and string bodies replaced by the corresponding
/// captured value. Free function (not `&self`) so unit tests can
/// drive it directly. JSON bodies are substituted by walking each
/// string leaf; non-string JSON values are left untouched.
fn apply_chain_context(check: &ConformanceCheck, ctx: &ChainContext) -> ConformanceCheck {
    let path = ctx.substitute(&check.path);
    let headers = check.headers.iter().map(|(k, v)| (k.clone(), ctx.substitute(v))).collect();
    let body = check.body.as_ref().map(|b| match b {
        CheckBody::Json(v) => CheckBody::Json(substitute_in_json(v, ctx)),
        CheckBody::FormUrlencoded(fields) => CheckBody::FormUrlencoded(
            fields.iter().map(|(k, v)| (k.clone(), ctx.substitute(v))).collect(),
        ),
        CheckBody::Raw {
            content,
            content_type,
        } => CheckBody::Raw {
            content: ctx.substitute(content),
            content_type: content_type.clone(),
        },
        // Multipart bytes are not text and are not template-targets;
        // pass-through unchanged so binary uploads are byte-identical
        // across iterations.
        CheckBody::Multipart { parts } => CheckBody::Multipart {
            parts: parts.clone(),
        },
    });
    ConformanceCheck {
        name: check.name.clone(),
        method: check.method.clone(),
        path,
        headers,
        body,
        validation: check.validation.clone(),
    }
}

fn substitute_in_json(value: &serde_json::Value, ctx: &ChainContext) -> serde_json::Value {
    use serde_json::Value;
    match value {
        Value::String(s) => Value::String(ctx.substitute(s)),
        Value::Array(arr) => Value::Array(arr.iter().map(|v| substitute_in_json(v, ctx)).collect()),
        Value::Object(obj) => Value::Object(
            obj.iter().map(|(k, v)| (k.clone(), substitute_in_json(v, ctx))).collect(),
        ),
        other => other.clone(),
    }
}

/// Round 38 (#79) — read captured cookies / headers / body fields off
/// a response and store them in the chain context for subsequent
/// requests to reference. Unknown extractions (e.g. a cookie name the
/// server didn't set) are silently skipped so a partially-met
/// extract block doesn't fail the whole chain.
fn extract_into_context(
    rules: &super::custom::ExtractRules,
    response_headers: &HashMap<String, String>,
    response_body: &str,
    ctx: &mut ChainContext,
) {
    // Cookies: every Set-Cookie header is parsed for `name=value`
    // (the cookie's own attributes after the value are dropped).
    // Multi-Set-Cookie responses (different `Set-Cookie` values
    // each with the same header name) are coalesced into one
    // comma-separated string when reqwest collects the headers,
    // so we split on commas and try each candidate.
    for cookie_name in &rules.cookies {
        if let Some(raw) = response_headers
            .iter()
            .find(|(k, _)| k.eq_ignore_ascii_case("set-cookie"))
            .map(|(_, v)| v)
        {
            // Each Set-Cookie entry looks like `name=value; attr=...`.
            // Multiple cookies in one header are comma-separated.
            for entry in raw.split(',') {
                let head = entry.split(';').next().unwrap_or(entry).trim();
                if let Some((name, value)) = head.split_once('=') {
                    if name.trim().eq_ignore_ascii_case(cookie_name) {
                        ctx.cookies.insert(cookie_name.clone(), value.trim().to_string());
                        break;
                    }
                }
            }
        }
    }
    // Headers: case-insensitive lookup.
    for (var_name, header_name) in &rules.headers {
        if let Some((_, value)) =
            response_headers.iter().find(|(k, _)| k.eq_ignore_ascii_case(header_name))
        {
            ctx.vars.insert(var_name.clone(), value.clone());
        }
    }
    // Body fields via simple dotted lookup. Empty / non-JSON bodies
    // simply contribute nothing rather than failing the chain.
    if !rules.body_fields.is_empty() {
        if let Ok(json) = serde_json::from_str::<serde_json::Value>(response_body) {
            for (var_name, field_path) in &rules.body_fields {
                if let Some(value) = lookup_json_path(&json, field_path) {
                    let stringified = match value {
                        serde_json::Value::String(s) => s.clone(),
                        other => other.to_string(),
                    };
                    ctx.vars.insert(var_name.clone(), stringified);
                }
            }
        }
    }
}

fn lookup_json_path<'a>(value: &'a serde_json::Value, path: &str) -> Option<&'a serde_json::Value> {
    let mut current = value;
    for segment in path.split('.') {
        current = match current {
            serde_json::Value::Object(obj) => obj.get(segment)?,
            _ => return None,
        };
    }
    Some(current)
}

/// Convert an `openapiv3::Schema` to a JSON Schema `serde_json::Value`
/// suitable for use with the `jsonschema` crate.
fn openapi_schema_to_json_schema(schema: &openapiv3::Schema) -> serde_json::Value {
    use openapiv3::{SchemaKind, Type};

    match &schema.schema_kind {
        SchemaKind::Type(Type::Object(obj)) => {
            let mut props = serde_json::Map::new();
            for (name, prop_ref) in &obj.properties {
                if let openapiv3::ReferenceOr::Item(prop_schema) = prop_ref {
                    props.insert(name.clone(), openapi_schema_to_json_schema(prop_schema));
                }
            }
            let mut schema_obj = serde_json::json!({
                "type": "object",
                "properties": props,
            });
            if !obj.required.is_empty() {
                schema_obj["required"] = serde_json::Value::Array(
                    obj.required.iter().map(|s| serde_json::json!(s)).collect(),
                );
            }
            schema_obj
        }
        SchemaKind::Type(Type::Array(arr)) => {
            let mut schema_obj = serde_json::json!({"type": "array"});
            if let Some(openapiv3::ReferenceOr::Item(item_schema)) = &arr.items {
                schema_obj["items"] = openapi_schema_to_json_schema(item_schema);
            }
            schema_obj
        }
        SchemaKind::Type(Type::String(s)) => {
            let mut obj = serde_json::json!({"type": "string"});
            if let Some(min) = s.min_length {
                obj["minLength"] = serde_json::json!(min);
            }
            if let Some(max) = s.max_length {
                obj["maxLength"] = serde_json::json!(max);
            }
            if let Some(pattern) = &s.pattern {
                obj["pattern"] = serde_json::json!(pattern);
            }
            if !s.enumeration.is_empty() {
                obj["enum"] = serde_json::Value::Array(
                    s.enumeration
                        .iter()
                        .filter_map(|v| v.as_ref().map(|s| serde_json::json!(s)))
                        .collect(),
                );
            }
            obj
        }
        SchemaKind::Type(Type::Integer(_)) => serde_json::json!({"type": "integer"}),
        SchemaKind::Type(Type::Number(_)) => serde_json::json!({"type": "number"}),
        SchemaKind::Type(Type::Boolean(_)) => serde_json::json!({"type": "boolean"}),
        _ => serde_json::json!({}),
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    /// Round 38 (#79) — substitution replaces `${var:...}`,
    /// `${cookie:...}`, and `${header:...}` tokens with the matching
    /// captured value. Unknown tokens are preserved verbatim so a
    /// missing capture is visible in the request log.
    #[test]
    fn chain_context_substitutes_all_token_kinds() {
        let mut ctx = ChainContext::default();
        ctx.vars.insert("csrf".to_string(), "abc123".to_string());
        ctx.vars.insert("trace".to_string(), "xyz".to_string());
        ctx.cookies.insert("session".to_string(), "deadbeef".to_string());
        assert_eq!(ctx.substitute("plain"), "plain");
        assert_eq!(ctx.substitute("X-CSRF: ${var:csrf}"), "X-CSRF: abc123");
        assert_eq!(ctx.substitute("Cookie: session=${cookie:session}"), "Cookie: session=deadbeef");
        // header: aliases var: so the same map is used.
        assert_eq!(ctx.substitute("X-Trace: ${header:trace}"), "X-Trace: xyz");
        // Unknown name preserved verbatim (no silent empty string).
        assert_eq!(ctx.substitute("missing: ${var:nope}"), "missing: ${var:nope}");
    }

    /// Round 38 — extraction pulls cookies, headers, and body fields
    /// off a response and stores them in the chain context under the
    /// caller-named keys.
    #[test]
    fn extract_into_context_captures_cookies_headers_and_body_fields() {
        let mut headers = HashMap::new();
        headers.insert("Set-Cookie".to_string(), "session=abc123; Path=/; HttpOnly".to_string());
        headers.insert("X-CSRF-Token".to_string(), "csrf-token-xyz".to_string());
        let body = r#"{"data":{"token":"body-token-456"},"id":42}"#;
        let mut rules = super::super::custom::ExtractRules::default();
        rules.cookies.push("session".to_string());
        rules.headers.insert("csrf".to_string(), "X-CSRF-Token".to_string());
        rules.body_fields.insert("nested_token".to_string(), "data.token".to_string());
        rules.body_fields.insert("user_id".to_string(), "id".to_string());
        let mut ctx = ChainContext::default();
        extract_into_context(&rules, &headers, body, &mut ctx);
        assert_eq!(ctx.cookies.get("session").map(|s| s.as_str()), Some("abc123"));
        assert_eq!(ctx.vars.get("csrf").map(|s| s.as_str()), Some("csrf-token-xyz"));
        assert_eq!(ctx.vars.get("nested_token").map(|s| s.as_str()), Some("body-token-456"));
        // Numeric body field stringifies to "42".
        assert_eq!(ctx.vars.get("user_id").map(|s| s.as_str()), Some("42"));
    }

    /// Round 38 — a missing cookie name doesn't poison subsequent
    /// extractions; the cookie pull silently no-ops and the header /
    /// body extractions still happen.
    #[test]
    fn extract_into_context_skips_missing_captures_gracefully() {
        let mut headers = HashMap::new();
        headers.insert("X-CSRF-Token".to_string(), "csrf-value".to_string());
        let body = r#"{"id":1}"#;
        let mut rules = super::super::custom::ExtractRules::default();
        rules.cookies.push("never-set".to_string());
        rules.headers.insert("csrf".to_string(), "X-CSRF-Token".to_string());
        let mut ctx = ChainContext::default();
        extract_into_context(&rules, &headers, body, &mut ctx);
        assert!(ctx.cookies.is_empty(), "missing cookie should not insert anything");
        assert_eq!(ctx.vars.get("csrf").map(|s| s.as_str()), Some("csrf-value"));
    }

    /// Round 38 — substitution into a ConformanceCheck flows through
    /// path, headers, raw bodies, JSON bodies, and form-urlencoded
    /// fields. Multipart bodies are pass-through (binary uploads
    /// shouldn't be touched by string templating).
    #[test]
    fn apply_chain_context_substitutes_path_headers_and_body() {
        let mut ctx = ChainContext::default();
        ctx.vars.insert("user".to_string(), "alice".to_string());
        ctx.cookies.insert("sid".to_string(), "deadbeef".to_string());
        let check = ConformanceCheck {
            name: "custom:t".into(),
            method: Method::POST,
            path: "/users/${var:user}".into(),
            headers: vec![("Cookie".into(), "sid=${cookie:sid}".into())],
            body: Some(CheckBody::Json(serde_json::json!({"by": "${var:user}", "ts": 1}))),
            validation: CheckValidation::ExactStatus(200),
        };
        let substituted = apply_chain_context(&check, &ctx);
        assert_eq!(substituted.path, "/users/alice");
        assert_eq!(substituted.headers[0].1, "sid=deadbeef");
        match substituted.body {
            Some(CheckBody::Json(v)) => {
                assert_eq!(v["by"], "alice");
                assert_eq!(v["ts"], 1);
            }
            _ => panic!("expected json body"),
        }
    }

    #[test]
    fn test_reference_check_count() {
        let config = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(config).unwrap().with_reference_checks();
        // 7 params + 3 bodies + 6 schema + 3 composition + 7 formats + 5 constraints
        // + 5 response codes + 7 methods + 1 content + 3 security = 47
        assert_eq!(executor.check_count(), 47);
    }

    #[test]
    fn with_custom_checks_from_config_appends() {
        // Construct an inline CustomConformanceConfig and verify both
        // that the checks are appended on top of reference-checks
        // mode and that the filter regex (when present) drops
        // non-matching entries.
        let custom_yaml = r#"
custom_checks:
  - name: "custom:health"
    path: /health
    method: GET
    expected_status: 200
  - name: "custom:create"
    path: /widgets
    method: POST
    expected_status: 201
"#;
        let parsed: CustomConformanceConfig =
            serde_yaml::from_str(custom_yaml).expect("YAML parses");
        assert_eq!(parsed.custom_checks.len(), 2);

        let base = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(base)
            .unwrap()
            .with_reference_checks()
            .with_custom_checks_from_config(parsed)
            .expect("custom checks load");
        // 47 reference checks + 2 custom = 49.
        assert_eq!(executor.check_count(), 49);
    }

    #[test]
    fn with_custom_checks_from_config_respects_filter() {
        // custom_filter is regex-based; only matching entries should
        // make it onto the executor.
        let custom_yaml = r#"
custom_checks:
  - name: "custom:health"
    path: /health
    method: GET
    expected_status: 200
  - name: "custom:create-widget"
    path: /widgets
    method: POST
    expected_status: 201
"#;
        let parsed: CustomConformanceConfig =
            serde_yaml::from_str(custom_yaml).expect("YAML parses");

        let base = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            // Reference checks would add 47; turn them off so the
            // count is purely the custom set after filtering.
            categories: Some(vec!["no_such_category".to_string()]),
            custom_filter: Some("health".to_string()),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(base)
            .unwrap()
            .with_reference_checks()
            .with_custom_checks_from_config(parsed)
            .expect("custom checks load");
        // categories filter drops all reference checks; custom_filter
        // keeps the one entry whose name matches /health/.
        assert_eq!(executor.check_count(), 1);
    }

    #[test]
    fn with_custom_checks_from_config_rejects_bad_filter_regex() {
        let parsed: CustomConformanceConfig =
            serde_yaml::from_str("custom_checks: []").expect("YAML parses");
        let base = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            custom_filter: Some("[unclosed".to_string()),
            ..Default::default()
        };
        let result = NativeConformanceExecutor::new(base)
            .unwrap()
            .with_reference_checks()
            .with_custom_checks_from_config(parsed);
        assert!(result.is_err(), "bad regex should bubble up as BenchError");
    }

    #[test]
    fn test_reference_checks_with_category_filter() {
        let config = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            categories: Some(vec!["Parameters".to_string()]),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(config).unwrap().with_reference_checks();
        assert_eq!(executor.check_count(), 7);
    }

    #[test]
    fn test_validate_status_range() {
        let config = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(config).unwrap();
        let headers = HashMap::new();

        assert!(
            executor
                .validate_response(
                    &CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                    200,
                    &headers,
                    "",
                )
                .0
        );
        assert!(
            executor
                .validate_response(
                    &CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                    404,
                    &headers,
                    "",
                )
                .0
        );
        assert!(
            !executor
                .validate_response(
                    &CheckValidation::StatusRange {
                        min: 200,
                        max_exclusive: 500,
                    },
                    500,
                    &headers,
                    "",
                )
                .0
        );
    }

    #[test]
    fn test_validate_exact_status() {
        let config = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(config).unwrap();
        let headers = HashMap::new();

        assert!(
            executor
                .validate_response(&CheckValidation::ExactStatus(200), 200, &headers, "")
                .0
        );
        assert!(
            !executor
                .validate_response(&CheckValidation::ExactStatus(200), 201, &headers, "")
                .0
        );
    }

    #[test]
    fn test_validate_schema() {
        let config = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(config).unwrap();
        let headers = HashMap::new();

        let schema = serde_json::json!({
            "type": "object",
            "properties": {
                "name": {"type": "string"},
                "age": {"type": "integer"}
            },
            "required": ["name"]
        });

        let (passed, violations) = executor.validate_response(
            &CheckValidation::SchemaValidation {
                status_min: 200,
                status_max: 300,
                schema: schema.clone(),
            },
            200,
            &headers,
            r#"{"name": "test", "age": 25}"#,
        );
        assert!(passed);
        assert!(violations.is_empty());

        // Missing required field
        let (passed, violations) = executor.validate_response(
            &CheckValidation::SchemaValidation {
                status_min: 200,
                status_max: 300,
                schema: schema.clone(),
            },
            200,
            &headers,
            r#"{"age": 25}"#,
        );
        assert!(!passed);
        assert!(!violations.is_empty());
        assert_eq!(violations[0].violation_type, "Required");
    }

    #[test]
    fn test_validate_custom() {
        let config = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            ..Default::default()
        };
        let executor = NativeConformanceExecutor::new(config).unwrap();
        let mut headers = HashMap::new();
        headers.insert("content-type".to_string(), "application/json".to_string());

        assert!(
            executor
                .validate_response(
                    &CheckValidation::Custom {
                        expected_status: 200,
                        expected_headers: vec![(
                            "content-type".to_string(),
                            "application/json".to_string(),
                        )],
                        expected_body_fields: vec![("name".to_string(), "string".to_string())],
                    },
                    200,
                    &headers,
                    r#"{"name": "test"}"#,
                )
                .0
        );

        // Wrong status
        assert!(
            !executor
                .validate_response(
                    &CheckValidation::Custom {
                        expected_status: 200,
                        expected_headers: vec![],
                        expected_body_fields: vec![],
                    },
                    404,
                    &headers,
                    "",
                )
                .0
        );
    }

    #[test]
    fn test_aggregate_results() {
        let results = vec![
            CheckResult {
                name: "check1".to_string(),
                passed: true,
                failure_detail: None,
                captured: None,
            },
            CheckResult {
                name: "check2".to_string(),
                passed: false,
                captured: None,
                failure_detail: Some(FailureDetail {
                    check: "check2".to_string(),
                    request: FailureRequest {
                        method: "GET".to_string(),
                        url: "http://example.com".to_string(),
                        headers: HashMap::new(),
                        body: String::new(),
                    },
                    response: FailureResponse {
                        status: 500,
                        headers: HashMap::new(),
                        body: "error".to_string(),
                    },
                    expected: "status >= 200 && status < 500".to_string(),
                    schema_violations: Vec::new(),
                }),
            },
        ];

        let report = NativeConformanceExecutor::aggregate(results);
        let raw = report.raw_check_results();
        assert_eq!(raw.get("check1"), Some(&(1, 0)));
        assert_eq!(raw.get("check2"), Some(&(0, 1)));
    }

    #[test]
    fn test_custom_check_building() {
        let config = ConformanceConfig {
            target_url: "http://localhost:3000".to_string(),
            ..Default::default()
        };
        let mut executor = NativeConformanceExecutor::new(config).unwrap();

        let custom = CustomCheck {
            name: "custom:test-get".to_string(),
            path: "/api/test".to_string(),
            method: "GET".to_string(),
            expected_status: 200,
            body: None,
            expected_headers: HashMap::new(),
            expected_body_fields: vec![],
            headers: HashMap::new(),
            upload: None,
            uploads: vec![],
            extract: crate::conformance::custom::ExtractRules::default(),
            repeat: crate::conformance::custom::Repeat::default(),
        };

        executor.add_custom_check(&custom);
        assert_eq!(executor.check_count(), 1);
        assert_eq!(executor.checks[0].name, "custom:test-get");
    }

    #[test]
    fn test_openapi_schema_to_json_schema_object() {
        use openapiv3::{ObjectType, Schema, SchemaData, SchemaKind, Type};

        let schema = Schema {
            schema_data: SchemaData::default(),
            schema_kind: SchemaKind::Type(Type::Object(ObjectType {
                required: vec!["name".to_string()],
                ..Default::default()
            })),
        };

        let json = openapi_schema_to_json_schema(&schema);
        assert_eq!(json["type"], "object");
        assert_eq!(json["required"][0], "name");
    }
}