car-inference 0.63.0

Local model inference for CAR — Candle backend with Qwen3 models
Documentation
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use super::*;
use wiremock::{
    matchers::{method, path},
    Mock, MockServer, ResponseTemplate,
};

// Every caller holds the crate's environment lock for this guard's lifetime.
struct Environment(Vec<(&'static str, Option<std::ffi::OsString>)>);

impl Environment {
    fn capture(names: &[&'static str]) -> Self {
        Self(
            names
                .iter()
                .map(|name| (*name, std::env::var_os(name)))
                .collect(),
        )
    }
}

impl Drop for Environment {
    fn drop(&mut self) {
        for (name, value) in &self.0 {
            unsafe {
                match value {
                    Some(value) => std::env::set_var(name, value),
                    None => std::env::remove_var(name),
                }
            }
        }
    }
}

fn direct_row(endpoint: String, key: &str) -> ModelSchema {
    let mut row = registry::builtin_catalog()
        .into_iter()
        .find(|s| s.id == "parslee/jev")
        .unwrap();
    row.id = "typesafe/test-direct".into();
    row.provider = "typesafe".into();
    row.name = "jev-latest".into();
    row.tags.clear();
    row.source = ModelSource::Proprietary {
        provider: "typesafe".into(),
        endpoint,
        auth: schema::ProprietaryAuth::ApiKeyEnv {
            env_var: key.into(),
        },
        protocol: schema::ProprietaryProtocol {
            chat_path: "/v1/systemone".into(),
            wire: ProprietaryWire::SystemOne,
            ..Default::default()
        },
    };
    row
}

fn engine_at(root: &Path) -> InferenceEngine {
    InferenceEngine::new(InferenceConfig {
        state_root: root.to_path_buf(),
        models_dir: root.join("models"),
        ..Default::default()
    })
}

fn classify_request() -> ClassifyRequest {
    ClassifyRequest {
        text: "billing question".into(),
        labels: vec!["billing".into(), "other".into()],
        model: None,
        work_context: None,
    }
}

#[test]
fn typesafe_direct_configured_missing_key_does_not_select_parslee() {
    let direct = direct_row("http://127.0.0.1:1".into(), "TYPESAFE_MISSING_TEST_KEY");
    let mut parslee = registry::builtin_catalog()
        .into_iter()
        .find(|s| s.id == "parslee/jev")
        .unwrap();
    parslee.available = true;
    assert_eq!(
        default_system_one_classifier([&parslee, &direct].into_iter()).as_deref(),
        Some("typesafe/test-direct")
    );
}

#[tokio::test]
async fn typesafe_direct_traffic_and_audit_in_both_parslee_states() {
    let _environment = openrouter::test_environment_scope_async().await;
    let _home = openrouter::StateRootScope::new();
    let root = tempfile::tempdir().unwrap();
    let key_name = "TYPESAFE_DIRECT_TRAFFIC_TEST_KEY";
    let _restore = Environment::capture(&[
        key_name,
        "PARSLEE_ACCESS_TOKEN",
        car_auth::PARSLEE_API_BASE_KEY,
    ]);
    let secret = car_secrets::SecretRef::with_default_service(key_name);
    car_secrets::SecretStore::new()
        .put(&secret, "synthetic-typesafe-key")
        .unwrap();
    // A conflicting process value must not replace the owner's stored key.
    unsafe {
        std::env::set_var(key_name, "synthetic-wrong-env-key");
    }
    let typesafe = MockServer::start().await;
    let parslee = MockServer::start().await;
    let response = serde_json::json!({"model":"jev-latest","answers":{"label":{"type":"choice","choice":"billing","confidence":0.9,"probabilities":{"billing":0.9,"other":0.1}}},"usage":{"input_tokens":10,"output_tokens":2}});
    Mock::given(method("POST"))
        .and(path("/v1/systemone"))
        .respond_with(ResponseTemplate::new(200).set_body_json(response.clone()))
        .mount(&typesafe)
        .await;
    for signed_in in [false, true] {
        unsafe {
            std::env::set_var(car_auth::PARSLEE_API_BASE_KEY, parslee.uri());
            if signed_in {
                std::env::set_var("PARSLEE_ACCESS_TOKEN", "synthetic-parslee-token");
            } else {
                std::env::remove_var("PARSLEE_ACCESS_TOKEN");
            }
        }
        let mut engine = engine_at(root.path());
        *engine.unified.write().unwrap() = Arc::new(UnifiedRegistry::new_with_session(
            root.path().to_path_buf(),
            root.path().join("models"),
            None,
            registry::SessionProbe::Fixed(signed_in),
        ));
        engine.register_model(direct_row(typesafe.uri(), key_name));
        let scores = engine.classify(classify_request()).await.unwrap();
        assert_eq!(scores[0].label, "billing");
        assert_eq!(scores[0].score, 0.9);
        let inferred = engine.generate_tracked(GenerateRequest {
            model: Some("typesafe/test-direct".into()),
            prompt: r#"{"state":"billing question","questions":{"label":{"type":"choice","criteria":{"other":"other","billing":"billing"}}}}"#.into(),
            params: GenerateParams { strict_model: true, ..Default::default() },
            ..Default::default()
        }).await.unwrap();
        assert_eq!(
            serde_json::from_str::<serde_json::Value>(&inferred.text).unwrap(),
            response
        );
        assert_eq!(inferred.usage.unwrap().prompt_tokens, 10);
        {
            let mut tracker = engine.outcome_tracker.write().await;
            for trace in tracker.pending_trace_ids() {
                tracker.record_inferred_outcome(&trace, InferredOutcome::Inconclusive);
            }
        }
        engine.flush_outcomes().await.unwrap();
    }
    let requests = typesafe.received_requests().await.unwrap();
    assert_eq!(requests.len(), 4);
    for request in requests {
        assert_eq!(
            request.headers.get("authorization").unwrap(),
            "Bearer synthetic-typesafe-key"
        );
        assert_eq!(
            request.body_json::<serde_json::Value>().unwrap()["model"],
            "jev-latest"
        );
        if request.body_json::<serde_json::Value>().unwrap()["state"].is_string() {
            let body = std::str::from_utf8(&request.body).unwrap();
            assert!(
                body.find(r#""other":"other""#).unwrap()
                    < body.find(r#""billing":"billing""#).unwrap()
            );
        }
    }
    assert!(parslee.received_requests().await.unwrap().is_empty());
    assert!(engine_at(root.path()).concierge_actions(50).is_empty());
    assert!(!root.path().join(action_ledger::ACTION_LEDGER_FILE).exists());
    let log = std::fs::read_to_string(root.path().join("models/outcome_ledger.jsonl")).unwrap();
    assert!(!log.contains("synthetic-typesafe-key"));
    assert!(!log.contains("synthetic-wrong-env-key"));
    let entries = outcome::read_ledger(&root.path().join("models/outcome_ledger.jsonl"), 0);
    assert_eq!(entries.len(), 4);
    assert!(entries.iter().all(|entry| {
        let audit: serde_json::Value = serde_json::from_str(&entry.routing_reason).unwrap();
        entry.model_id == "typesafe/test-direct"
            && audit["provider"] == "typesafe"
            && audit["provider_row"] == "typesafe/test-direct"
            && audit["key_id"] == key_name
    }));
    car_secrets::SecretStore::new().delete(&secret).unwrap();
}

#[tokio::test]
async fn typesafe_direct_fifty_calls_preserve_management_history() {
    let _environment = openrouter::test_environment_scope_async().await;
    let _home = openrouter::StateRootScope::new();
    let root = tempfile::tempdir().unwrap();
    let key_name = "TYPESAFE_DIRECT_HISTORY_TEST_KEY";
    let secret = car_secrets::SecretRef::with_default_service(key_name);
    let store = car_secrets::SecretStore::new();
    store.put(&secret, "synthetic-history-key").unwrap();
    let typesafe = MockServer::start().await;
    Mock::given(method("POST"))
        .and(path("/v1/systemone"))
        .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
            "answers":{"label":{"type":"choice","choice":"billing",
                "probabilities":{"billing":0.9,"other":0.1}}}
        })))
        .mount(&typesafe)
        .await;
    let actions_path = root.path().join(action_ledger::ACTION_LEDGER_FILE);
    for (seq, kind) in [ConciergeActionKind::Install, ConciergeActionKind::Rollback]
        .into_iter()
        .enumerate()
    {
        action_ledger::append_action(
            &actions_path,
            &ConciergeActionEntry {
                seq: seq as u64 + 1,
                kind,
                model_id: "operator-model".into(),
                use_case: Some(UseCase::Coding),
                project: None,
                prior_model_id: Some("prior-model".into()),
                detail: "operator-approved change".into(),
                timestamp: 100,
            },
        )
        .unwrap();
    }
    let mut engine = engine_at(root.path());
    engine.register_model(direct_row(typesafe.uri(), key_name));
    let history = engine.concierge_actions(50);
    let bytes = std::fs::read(&actions_path).unwrap();
    for _ in 0..50 {
        let scores = engine.classify(classify_request()).await.unwrap();
        assert_eq!(scores[0].label, "billing");
        assert_eq!(scores[0].score, 0.9);
    }
    {
        let mut tracker = engine.outcome_tracker.write().await;
        for trace in tracker.pending_trace_ids() {
            tracker.record_inferred_outcome(&trace, InferredOutcome::Inconclusive);
        }
    }
    engine.flush_outcomes().await.unwrap();
    assert_eq!(engine.concierge_actions(50), history);
    assert_eq!(std::fs::read(&actions_path).unwrap(), bytes);
    assert_eq!(engine_at(root.path()).concierge_actions(50), history);
    let audit_path = root.path().join("models/outcome_ledger.jsonl");
    let entries = outcome::read_ledger(&audit_path, 0);
    assert_eq!(entries.len(), 50);
    assert!(entries.iter().all(|entry| {
        let audit: serde_json::Value = serde_json::from_str(&entry.routing_reason).unwrap();
        entry.model_id == "typesafe/test-direct"
            && entry.task == InferenceTask::Classify
            && audit["provider"] == "typesafe"
            && audit["provider_row"] == "typesafe/test-direct"
            && audit["key_id"] == key_name
    }));
    assert!(!std::fs::read_to_string(audit_path)
        .unwrap()
        .contains("synthetic-history-key"));
    store.delete(&secret).unwrap();
}

#[tokio::test]
async fn typesafe_direct_missing_key_fails_named_without_network() {
    let _environment = openrouter::test_environment_scope_async().await;
    let _home = openrouter::StateRootScope::new();
    let key = "TYPESAFE_ABSENT_DIRECT_TEST_KEY";
    let _restore =
        Environment::capture(&[key, "PARSLEE_ACCESS_TOKEN", car_auth::PARSLEE_API_BASE_KEY]);
    let typesafe = MockServer::start().await;
    let parslee = MockServer::start().await;
    unsafe {
        std::env::set_var(key, "synthetic-env-only-key");
        std::env::set_var("PARSLEE_ACCESS_TOKEN", "synthetic-parslee-token");
        std::env::set_var(car_auth::PARSLEE_API_BASE_KEY, parslee.uri());
    }
    let root = tempfile::tempdir().unwrap();
    let mut engine = engine_at(root.path());
    engine.register_model(direct_row(
        typesafe.uri(),
        "TYPESAFE_ABSENT_DIRECT_TEST_KEY",
    ));
    let error = engine.classify(classify_request()).await.unwrap_err();
    assert!(
        error
            .to_string()
            .contains("TYPESAFE_ABSENT_DIRECT_TEST_KEY"),
        "{error}"
    );
    let error = engine.generate_tracked(GenerateRequest {
        model: Some("typesafe/test-direct".into()),
        prompt: r#"{"state":"question","questions":{"urgent":{"type":"noul","instructions":"Urgent?"}}}"#.into(),
        ..Default::default()
    }).await.unwrap_err();
    assert!(error.to_string().contains(key), "{error}");
    assert!(typesafe.received_requests().await.unwrap().is_empty());
    assert!(parslee.received_requests().await.unwrap().is_empty());
}

#[tokio::test]
async fn typesafe_direct_status_uses_stored_presence_without_value_reads() {
    let _environment = openrouter::test_environment_scope_async().await;
    let home = openrouter::StateRootScope::new();
    let key = "TYPESAFE_DIRECT_STATUS_TEST_KEY";
    let _restore = Environment::capture(&[key]);
    unsafe { std::env::set_var(key, "synthetic-env-only-key") };
    let secret = car_secrets::SecretRef::with_default_service(key);
    let store = car_secrets::SecretStore::new();
    let mut registry = UnifiedRegistry::new_with_session(
        home.path().to_owned(),
        home.path().join("models"),
        None,
        registry::SessionProbe::Fixed(false),
    );
    registry.register(direct_row("https://api.typesafe.ai".into(), key));
    let scope = car_secrets::ActivityScope::begin();
    let before = scope.activity();
    registry.refresh_availability();
    assert!(!registry.get("typesafe/test-direct").unwrap().available);
    assert_eq!(scope.activity().get_attempts, before.get_attempts);
    registry.refresh_availability_for_explicit_status();
    assert!(!registry.get("typesafe/test-direct").unwrap().available);
    store.put(&secret, "synthetic-stored-key").unwrap();
    let scope = car_secrets::ActivityScope::begin();
    let before = scope.activity();
    registry.refresh_availability_for_explicit_status();
    assert!(registry.get("typesafe/test-direct").unwrap().available);
    assert_eq!(scope.activity().get_attempts, before.get_attempts);
    store.delete(&secret).unwrap();
}

#[tokio::test]
async fn typesafe_direct_refuses_header_overrides_and_redirects() {
    let _environment = openrouter::test_environment_scope_async().await;
    let _home = openrouter::StateRootScope::new();
    let key = "TYPESAFE_DIRECT_HEADERS_TEST_KEY";
    let secret = car_secrets::SecretRef::with_default_service(key);
    let store = car_secrets::SecretStore::new();
    store.put(&secret, "synthetic-stored-key").unwrap();
    let typesafe = MockServer::start().await;
    let redirected = MockServer::start().await;
    Mock::given(method("POST"))
        .respond_with(
            ResponseTemplate::new(307)
                .insert_header("location", format!("{}/stolen", redirected.uri())),
        )
        .mount(&typesafe)
        .await;
    let root = tempfile::tempdir().unwrap();
    let mut engine = engine_at(root.path());
    for name in ["Host", "Authorization", "bad header"] {
        let mut row = direct_row(typesafe.uri(), key);
        if let ModelSource::Proprietary { protocol, .. } = &mut row.source {
            protocol
                .extra_headers
                .insert(name.into(), "synthetic-override".into());
        }
        engine.register_model(row);
        let error = engine.classify(classify_request()).await.unwrap_err();
        assert!(
            error.to_string().contains("header") || error.to_string().contains("override"),
            "{error}"
        );
    }
    assert!(typesafe.received_requests().await.unwrap().is_empty());
    engine.register_model(direct_row(typesafe.uri(), key));
    let error = engine.classify(classify_request()).await.unwrap_err();
    assert!(error.to_string().contains("307"), "{error}");
    assert!(redirected.received_requests().await.unwrap().is_empty());
    let result = engine
        .generate_tracked_stream(GenerateRequest {
            model: Some("typesafe/test-direct".into()),
            prompt: "stream me".into(),
            ..Default::default()
        })
        .await;
    let error = match result {
        Err(error) => error,
        Ok(_) => panic!("TypeSafe stream must refuse"),
    };
    assert!(error.to_string().contains("non-streaming"), "{error}");
    assert_eq!(typesafe.received_requests().await.unwrap().len(), 1);
    typesafe.reset().await;
    Mock::given(method("POST"))
        .respond_with(
            ResponseTemplate::new(200)
                .set_body_json(serde_json::json!({"echoed_key": "synthetic-stored-key"})),
        )
        .mount(&typesafe)
        .await;
    let error = engine.classify(classify_request()).await.unwrap_err();
    assert!(error
        .to_string()
        .contains("invalid classification response"));
    assert!(!error.to_string().contains("synthetic-stored-key"));
    engine.flush_outcomes().await.unwrap();
    let log = std::fs::read_to_string(root.path().join("models/outcome_ledger.jsonl")).unwrap();
    assert!(!log.contains("synthetic-stored-key"));
    store.delete(&secret).unwrap();
}