Add coverage tests for performance tracker transitions

[matdev83]

Summary

• add regression tests covering phase switching behavior in the performance tracker
• verify that ending phases without markers leaves metrics unchanged
• ensure the performance summary finalizes metrics when total time is missing

Testing

• ./.venv/Scripts/python.exe -m pytest tests/unit/test_performance_tracker.py (fails: virtual environment interpreter missing in container)

---

https://chatgpt.com/codex/tasks/task_e_68ec25224bf48333833385c22e1af9be

Summary by CodeRabbit

• Tests
  • Added new unit tests to improve reliability of performance tracking and logging.
  • Expanded coverage for phase transitions, handling missing timing markers, and final summary generation.
  • Verifies correct timing capture and resilient behavior across edge cases.
  • No functional or UI changes; enhances stability and confidence in future updates.

[coderabbitai]

Walkthrough

Adds three new unit tests in tests/unit/test_performance_tracker.py validating PerformanceMetrics phase transitions (start_phase/end_phase), handling of missing start markers, and log_summary behavior that triggers finalize and records total_time including session_id.

Changes

Cohort / File(s)	Summary
PerformanceMetrics tests tests/unit/test_performance_tracker.py	Added tests: start_phase transitions and timing marker; end_phase behavior when start marker missing; log_summary triggering finalize to capture total_time and include session_id in PERF_SUMMARY log.

Sequence Diagram(s)

sequenceDiagram
  autonumber
  participant C as Caller
  participant PM as PerformanceMetrics
  participant T as time.time

  Note over PM: Phase management flow

  C->>PM: start_phase(new_phase)
  PM->>PM: end_phase(current_phase)?
  PM->>T: now = time.time()
  PM->>PM: record start marker for new_phase
  PM-->>C: ok

  C->>PM: end_phase(current_phase)
  alt start marker exists
    PM->>T: now = time.time()
    PM->>PM: compute duration & store
  else no start marker
    PM->>PM: clear current phase only
  end
  PM-->>C: ok

  C->>PM: log_summary()
  alt total_time missing
    PM->>PM: finalize()
    PM->>T: now = time.time()
    PM->>PM: set total_time
  end
  PM-->>C: PERF_SUMMARY (includes session_id)

Loading

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Improve performance tracker test coverage #551: Also adds/expands unit tests in tests/unit/test_performance_tracker.py covering start_phase, end_phase, finalize, and log_summary behaviors.

Poem

I tap my paws, count ticks in time,
Phases hop—start, end—rhythm sublime.
When totals hide, I sniff, finalize—
A PERF_SUMMARY under moonlit skies.
With session trails and clocks that chime,
This rabbit logs each perfect rhyme. 🐇⌛️

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title succinctly captures the primary change by indicating that new coverage tests are being added for the performance tracker’s phase transitions, matching the pull request’s focus on unit tests for start/end phase behavior and summary finalization. It is clear, concise, and directly related to the main objective without extraneous details.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch codex/find-and-improve-lowest-test-coverage-file-q7sic2

---

📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 4b959ef and ab877f2.

📒 Files selected for processing (1)

• tests/unit/test_performance_tracker.py (1 hunks)

🧰 Additional context used

📓 Path-based instructions (1)

**/*.py

📄 CodeRabbit inference engine (AGENTS.md)

**/*.py: Avoid using emojis in Python code comments or docstrings
Follow PEP 8 and use type hints for all functions
Import order must be: standard library, third-party, then local imports, separated by blank lines
Naming conventions: snake_case for variables and functions; PascalCase for classes
Error handling: use specific exceptions and include meaningful error messages
Prefer f-strings for string formatting

Files:

• tests/unit/test_performance_tracker.py

🧬 Code graph analysis (1)

tests/unit/test_performance_tracker.py (1)

src/performance_tracker.py (5)

• PerformanceMetrics (15-124)
• start_phase (37-44)
• end_phase (46-66)
• finalize (68-73)
• log_summary (75-102)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)

• GitHub Check: test (3.10)
• GitHub Check: Analyze (python)

🔇 Additional comments (3)

tests/unit/test_performance_tracker.py (3)

202-221: LGTM! Test correctly verifies phase switching.

The test properly verifies that start_phase calls end_phase for the previous phase before starting a new one, and confirms the new phase and marker are set correctly.

Minor optional refinement: Line 210's or "" is defensive but unnecessary since _current_phase is explicitly set to "command_processing" before start_phase is called, so it cannot be None at that point. However, this defensive style doesn't hurt and may improve clarity.

---

223-234: LGTM! Good edge case coverage.

The test correctly verifies that end_phase handles missing start markers gracefully by not setting duration metrics while still clearing the current phase state.

---

236-262: LGTM! Comprehensive test of log_summary finalization.

The test effectively verifies that log_summary triggers finalization when total_time is missing, using a wrapper pattern to confirm the call while also validating the resulting metrics and log output.

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[matdev83]

Merge Decision: ✅ APPROVED

Successfully reviewed and cherry-picked changes from this PR into local dev branch (commit 9320fa1).

Changes Reviewed:

• test_start_phase_switches_phases: ✅ Properly verifies phase switching behavior and cleanup
• test_end_phase_ignores_missing_start: ✅ Correctly tests graceful handling of missing start markers
• test_log_summary_finalizes_when_total_missing: ✅ Ensures finalize() is called when total_time is missing (fixed timing issues)

Code Quality:

• All tests follow existing patterns and coding standards
• Added meaningful test coverage for edge cases in performance tracker
• Fixed timing issues in the originally skipped test
• No regressions introduced - all unit tests pass (2991 passed, 15 skipped)

Verification:

• All new tests pass locally
• All existing unit tests continue to pass
• Changes are additive and improve test reliability

The changes enhance test coverage for critical performance tracking functionality without any breaking changes. PR has been successfully merged via cherry-pick to dev branch.

🤖 Generated with Claude Code