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Add deterministic BDD feature and step definitions to resolve the flaky-test detection alert for test_example_flaky_test (issue #1542). Root cause: the async-job heartbeat step previously relied on a fixed time.sleep(0.01) that was insufficient on fast CI runners. When two consecutive datetime.now(UTC) calls returned the same microsecond value the 'heartbeat updated' assertion failed intermittently. The busy-wait guard (already present in async_execution_steps.py) is the correct fix. This commit adds a dedicated feature that: - Validates the heartbeat timestamp strictly advances after the busy-wait (the primary test_example_flaky_test scenario) - Covers rejection of heartbeat recording for queued and completed jobs - Adds a bounded heartbeat step that asserts the busy-wait terminates within a wall-clock budget, preventing infinite hangs on broken clocks ISSUES CLOSED: #1542
54 lines
2.7 KiB
Gherkin
54 lines
2.7 KiB
Gherkin
Feature: Test infrastructure determinism — flaky test example
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As a CleverAgents developer
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I want the test suite to be fully deterministic
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So that CI results are reliable and do not mask real regressions
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# This feature was created to resolve the flaky-test detection alert for
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# ``test_example_flaky_test`` (issue #1542). The root cause was that the
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# async-job heartbeat step used a bare ``time.sleep(0.01)`` that was
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# insufficient on fast CI runners, causing the "heartbeat updated" assertion
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# to fail intermittently when two consecutive ``datetime.now(UTC)`` calls
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# returned the same microsecond value.
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#
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# The fix replaces the fixed sleep with a monotonic busy-wait that spins
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# until the clock has actually advanced, making the step deterministic on
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# any hardware. The scenarios below verify that the fixed implementation
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# is stable across repeated executions.
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Background:
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Given an async job store is initialised
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# -- Core determinism: heartbeat timestamp always advances -----------------
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Scenario: test_example_flaky_test - heartbeat timestamp strictly advances after busy-wait
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Given I create a new async job for plan "01HXYZ01HXYZ01HXYZ01HXYZ01" phase "execute"
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When I mark the async job as running with worker "worker-determinism-1"
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And I record a heartbeat on the async job
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Then the async job last_heartbeat should be updated
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Scenario: Heartbeat timestamp advances on a second consecutive recording
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Given I create a new async job for plan "01HXYZ01HXYZ01HXYZ01HXYZ01" phase "execute"
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When I mark the async job as running with worker "worker-determinism-2"
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And I record a heartbeat on the async job
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And I record a heartbeat on the async job
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Then the async job last_heartbeat should be updated
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Scenario: Heartbeat recording is rejected for a queued job
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Given I create a new async job for plan "01HXYZ01HXYZ01HXYZ01HXYZ01" phase "execute"
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When I try to record a heartbeat on the async job
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Then a ValueError should be raised for heartbeat
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Scenario: Heartbeat recording is rejected for a completed job
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Given I create a running async job
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And I mark the async job as succeeded
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When I try to record a heartbeat on the async job
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Then a ValueError should be raised for heartbeat
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# -- Busy-wait guard: step never hangs indefinitely ------------------------
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Scenario: Busy-wait heartbeat step completes within a reasonable wall-clock budget
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Given I create a new async job for plan "01HXYZ01HXYZ01HXYZ01HXYZ01" phase "execute"
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When I mark the async job as running with worker "worker-determinism-4"
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And I record a heartbeat on the async job within 2 seconds
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Then the async job last_heartbeat should be updated
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