Struct TestEngine 

pub struct TestEngine { /* private fields */ }

Runs a WorkflowHandler against an in-memory store with mocked steps.

See the module documentation for what the harness replaces and what it does not.

Examples

use ironflow_engine::prelude::*;
use ironflow_engine::testing::{MockShellOutput, TestEngine};
use ironflow_store::models::RunStatus;
use serde_json::json;

let result = TestEngine::new()
    .with_handler(Deploy)
    .with_mock_shell(|_cfg| Ok(MockShellOutput::ok("deployed")))
    .run(json!({"env": "prod"}))
    .await?;

assert_eq!(result.status(), RunStatus::Completed);

Implementations

impl TestEngine

pub fn new() -> Self

A harness with no handler and no mock.

Examples

use ironflow_engine::testing::TestEngine;

let harness = TestEngine::new();
assert!(format!("{harness:?}").contains("TestEngine"));

pub fn with_handler(self, handler: impl WorkflowHandler + 'static) -> Self

Register a handler. The first one registered is what run executes.

Panics

Panics when called after the first run: the engine is built once, so a later registration would be silently ignored.

Examples

use ironflow_engine::prelude::*;
use ironflow_engine::testing::TestEngine;

let harness = TestEngine::new().with_handler(Deploy);

pub fn with_mock_shell( self, f: impl Fn(&ShellConfig) -> Result<MockShellOutput, OperationError> + Send + Sync + 'static, ) -> Self

Answer every shell step with f instead of spawning a process.

Returning Err reproduces a shell failure the same way a non-zero MockShellOutput::exit_code does.

Panics

Panics when called after the first run.

Examples

use ironflow_engine::testing::{MockShellOutput, TestEngine};

let harness = TestEngine::new().with_mock_shell(|cfg| {
    if cfg.command.starts_with("git ") {
        Ok(MockShellOutput::ok("abc1234"))
    } else {
        Ok(MockShellOutput::failed(127, "command not found"))
    }
});

pub fn with_mock_http( self, f: impl Fn(&HttpConfig) -> Result<MockHttpResponse, OperationError> + Send + Sync + 'static, ) -> Self

Answer every HTTP step with f instead of sending a request.

A non-2xx MockHttpResponse is a normal output, like in production. Return Err(OperationError::Http { status: None, .. }) to simulate a transport failure.

Panics

Panics when called after the first run.

Examples

use ironflow_engine::testing::{MockHttpResponse, TestEngine};
use serde_json::json;

let harness = TestEngine::new()
    .with_mock_http(|_cfg| Ok(MockHttpResponse::json(201, &json!({"id": 7}))));

pub fn with_mock_approval(self, outcome: ApprovalOutcome) -> Self

Resolve every approval gate with outcome instead of suspending.

Without this, a gated handler ends the run in RunStatus::AwaitingApproval and resume continues it.

Panics

Panics when called after the first run.

Examples

use ironflow_engine::testing::{ApprovalOutcome, TestEngine};

let harness = TestEngine::new().with_mock_approval(ApprovalOutcome::Approved);

pub fn with_mock_agent( self, f: impl Fn(&AgentConfig) -> Result<AgentOutput, AgentError> + Send + Sync + 'static, ) -> Self

Answer every agent step with f instead of invoking a backend.

Panics

Panics when called after the first run.

Examples

use ironflow_core::provider::AgentOutput;
use ironflow_engine::testing::TestEngine;
use serde_json::json;

let harness = TestEngine::new()
    .with_mock_agent(|_cfg| Ok(AgentOutput::new(json!({"score": 9}))));

pub fn with_recorded_agent(self, fixtures_dir: &str) -> Self

Replay agent steps from fixtures recorded in fixtures_dir.

fixtures_dir is the directory, not a file: RecordReplayProvider keys each fixture by a hash of the AgentConfig and stores it as <hash>.json inside it. A missing fixture falls back to MissingAgentProvider, so the step fails loudly instead of reaching the real Claude CLI.

Panics

Panics when called after the first run.

Examples

use ironflow_engine::testing::TestEngine;

let harness = TestEngine::new().with_recorded_agent("tests/fixtures");

pub fn with_agent_provider(self, provider: Arc<dyn AgentProvider>) -> Self

Use an arbitrary AgentProvider for agent steps.

The escape hatch for anything the three with_mock_* methods do not cover, such as recording new fixtures.

Panics

Panics when called after the first run.

Examples

use std::sync::Arc;

use ironflow_core::provider::AgentProvider;
use ironflow_engine::testing::TestEngine;

let harness = TestEngine::new().with_agent_provider(provider);

pub fn with_decision_provider(self, provider: Arc<dyn DecisionProvider>) -> Self

Use a DecisionProvider for ctx.decision(...) steps.

Decision steps are not intercepted: without a provider they fail with EngineError::NoDecisionProvider.

Panics

Panics when called after the first run.

Examples

use std::sync::Arc;

use ironflow_core::decision::DecisionProvider;
use ironflow_engine::testing::TestEngine;

let harness = TestEngine::new().with_decision_provider(provider);

pub fn store(&self) -> Arc<InMemoryStore>

The store backing this harness, for assertions the accessors do not cover (child runs, step dependencies, logs).

Examples

use ironflow_engine::error::EngineError;
use ironflow_engine::testing::TestEngine;
use ironflow_store::store::RunStore;
use uuid::Uuid;

let steps = harness.store().list_steps(run_id).await?;
assert!(!steps.is_empty());

pub async fn run(&mut self, payload: Value) -> Result<TestResult, EngineError>

Run the first handler registered with with_handler.

A handler that fails is not an error: the returned TestResult then carries RunStatus::Failed and the message in TestResult::error.

Errors

Returns EngineError::InvalidWorkflow when no handler was registered or two handlers share a name, and EngineError::Store when the in-memory store rejects a write.

Examples

use ironflow_engine::prelude::*;
use ironflow_engine::testing::{MockShellOutput, TestEngine};
use serde_json::json;

let result = TestEngine::new()
    .with_handler(Deploy)
    .with_mock_shell(|_cfg| Ok(MockShellOutput::ok("done")))
    .run(json!({}))
    .await?;
assert!(result.is_completed());

pub async fn run_workflow( &mut self, name: &str, payload: Value, ) -> Result<TestResult, EngineError>

Run a specific registered handler by name.

Errors

Same as run, plus EngineError::InvalidWorkflow when name matches no registered handler.

Examples

use ironflow_engine::error::EngineError;
use ironflow_engine::testing::TestEngine;
use serde_json::json;

let result = harness.run_workflow("child", json!({"id": 1})).await?;
assert!(result.is_completed());

pub async fn resume(&mut self, run_id: Uuid) -> Result<TestResult, EngineError>

Resume a run suspended on an approval gate, the way the API server does.

Errors

Returns EngineError::Store when the run does not exist or is not resumable, and EngineError::InvalidWorkflow when its handler is no longer registered.

Examples

use ironflow_engine::error::EngineError;
use ironflow_engine::testing::TestEngine;
use ironflow_store::models::RunStatus;
use serde_json::json;

let suspended = harness.run(json!({})).await?;
assert_eq!(suspended.status(), RunStatus::AwaitingApproval);

let resumed = harness.resume(suspended.run_id()).await?;
assert_eq!(resumed.status(), RunStatus::Completed);

Trait Implementations

impl Debug for TestEngine

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for TestEngine

fn default() -> Self

Returns the “default value” for a type.