codex - 💡(How to fix) Fix Bug: Flaky tests left ignored without resolution

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Multiple tests are marked #[ignore] with flaky-related TODO comments. These represent real functionality that is not being verified in CI:

  1. codex-rs/core/tests/suite/pending_input.rs:221injected_user_input_triggers_follow_up_request_with_deltas

    #[ignore = "TODO(aibrahim): flaky"]
  2. codex-rs/app-server/tests/suite/v2/review.rs:143test_review_multiple_threads

    #[ignore = "TODO(owenlin0): flaky"]
  3. codex-rs/tui/tests/suite/no_panic_on_startup.rs:9test_no_panic_on_startup

    #[ignore = "TODO(mbolin): flaky"]

Additionally, two tests are ignored due to unimplemented features:

  1. codex-rs/core/tests/suite/codex_delegate.rs:27test_codex_delegate_with_approval

    #[ignore = "TODO once we have a delegate that can ask for approvals"]
  2. codex-rs/core/tests/suite/codex_delegate.rs:119test_codex_delegate_with_rejection

    #[ignore = "TODO once we have a delegate that can ask for approvals"]

Root Cause

Suggested fix

  • For the flaky tests: investigate the root cause of flakiness (likely timing/race conditions) and fix the underlying issue rather than ignoring the tests.
  • For the delegate tests: either implement the approval flow or remove the dead test code.

Code Example

#[ignore = "TODO(aibrahim): flaky"]

---

#[ignore = "TODO(owenlin0): flaky"]

---

#[ignore = "TODO(mbolin): flaky"]

---

#[ignore = "TODO once we have a delegate that can ask for approvals"]

---

#[ignore = "TODO once we have a delegate that can ask for approvals"]
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Description

Multiple tests are marked #[ignore] with flaky-related TODO comments. These represent real functionality that is not being verified in CI:

  1. codex-rs/core/tests/suite/pending_input.rs:221injected_user_input_triggers_follow_up_request_with_deltas

    #[ignore = "TODO(aibrahim): flaky"]
  2. codex-rs/app-server/tests/suite/v2/review.rs:143test_review_multiple_threads

    #[ignore = "TODO(owenlin0): flaky"]
  3. codex-rs/tui/tests/suite/no_panic_on_startup.rs:9test_no_panic_on_startup

    #[ignore = "TODO(mbolin): flaky"]

Additionally, two tests are ignored due to unimplemented features:

  1. codex-rs/core/tests/suite/codex_delegate.rs:27test_codex_delegate_with_approval

    #[ignore = "TODO once we have a delegate that can ask for approvals"]
  2. codex-rs/core/tests/suite/codex_delegate.rs:119test_codex_delegate_with_rejection

    #[ignore = "TODO once we have a delegate that can ask for approvals"]

Impact

  • Flaky tests mask real race conditions or timing issues that users may encounter.
  • Unimplemented feature tests indicate incomplete delegate approval/rejection functionality.

Suggested fix

  • For the flaky tests: investigate the root cause of flakiness (likely timing/race conditions) and fix the underlying issue rather than ignoring the tests.
  • For the delegate tests: either implement the approval flow or remove the dead test code.

Environment

  • Files as listed above, main branch

extent analysis

TL;DR

Investigate and fix the root cause of flakiness in ignored tests to ensure real functionality is verified in CI.

Guidance

  • Identify the specific conditions that cause the flaky tests to fail, focusing on potential timing or race conditions.
  • Review the test code for injected_user_input_triggers_follow_up_request_with_deltas, test_review_multiple_threads, and test_no_panic_on_startup to understand the expected behavior and how it might be failing intermittently.
  • Consider implementing retry mechanisms or synchronization primitives to stabilize the flaky tests, if the issue is indeed related to timing or concurrency.
  • For the unimplemented feature tests, either implement the necessary approval flow for the delegate or remove the test code to avoid false positives in CI.

Example

No specific code snippet can be provided without modifying the existing test code, but an example of how to stabilize a flaky test might involve using a retry mechanism:

#[test]
fn injected_user_input_triggers_follow_up_request_with_deltas() {
    // Existing test code...
    // If the test is flaky due to timing, consider adding a retry:
    for _ in 0..3 {
        // Test logic here
        if /* test condition */ {
            return; // Test passed
        }
        // Wait briefly before retrying
        std::thread::sleep(std::time::Duration::from_millis(100));
    }
    // If all retries fail, the test fails
    assert!(/* test condition */);
}

Notes

The exact solution will depend on the specifics of the test code and the nature of the flakiness. It's also important to address the unimplemented feature tests to ensure complete coverage of the delegate approval/rejection functionality.

Recommendation

Apply workaround: Implement retry mechanisms or synchronization primitives to stabilize the flaky tests, and address the unimplemented feature tests by either implementing the approval flow or removing the dead test code. This approach allows for immediate progress on stabilizing the test suite while planning for the implementation of the necessary features.

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