Archery Apprentice Documentation

2025-10-09-test-coverage-lifecycle-fixes

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Oct 9, 2025 - Test Coverage & Lifecycle Fixes

Session Summary

Two-session day focused on test coverage improvement and proactive bug prevention. Added 25 comprehensive tests for RoundViewModel, raising coverage from 50.99% to >60%. Fixed coroutine lifecycle issue in EndCompletionService to prevent memory leaks.

Key Accomplishments

🧪 Test Coverage Improvement

  • 25 New Tests Added: Comprehensive RoundViewModel business logic coverage
    • formatRankDisplay: 13 tests (rank suffixes, teen exceptions, edge cases)
    • getSortedEndsForDisplay: 4 tests (multi-participant sorting)
    • isScoringSystemAutoSelected: 8 tests (auto-selection logic)
  • Coverage Increase: RoundViewModel 50.99% → >60% (~+10%)
  • New Test File: Created RoundViewModelInputValidationTest.kt
  • All Tests Passing: 169 RoundViewModel tests ✅

🐛 Bug Fixes

  • EndCompletionService Lifecycle: Fixed memory leak risk
    • Converted submitTournamentEnd to suspend function
    • Removed internal scope.launch wrapper
    • Work now runs on caller’s lifecycle-aware scope
  • Navigation Investigation: Verified popUpTo patterns are correct (no changes needed)

📊 Progress Metrics

  • ViewModel Refactoring: 70% complete (+8% from StateFlow + testing)
  • Testing Coverage: 99% overall (+1%)
  • Build Stability: 100% (all tests passing)

Files Modified

  • ✏️ RoundViewModelHelperMethodsTest.kt - Added 17 tests
  • ✨ RoundViewModelInputValidationTest.kt - New file with 8 tests
  • ✏️ EndCompletionService.kt - Coroutine lifecycle fix

Technical Insights

Test Organization Pattern

Split large test classes by functional area using shared base class:

  • RoundViewModelTestBase - Shared setup
  • RoundViewModelHelperMethodsTest - Helper methods
  • RoundViewModelInputValidationTest - Input validation
  • Benefits: Easier navigation, faster execution, clear organization

Lifecycle-Aware Coroutines

Use suspend functions instead of internal scopes for lifecycle control:

// ✅ Good: Suspend function on caller's scope
private suspend fun submitWork() {
    doWork()  // Stops when caller's scope cancelled
}
 
// ❌ Bad: Internal scope (not lifecycle-aware)
private fun submitWork() {
    internalScope.launch {
        doWork()  // Continues after ViewModel cleared
    }
}

Edge Case Testing

Test unusual inputs that might break logic:

  • Teen numbers (11th, 12th, 13th - not 11st, 12nd, 13rd)
  • Large numbers (1001st, 1012th)
  • Boundary conditions (single participant)
  • Null handling

Next Steps

  • Continue RoundViewModel test coverage (target 70%+)
  • Test createParticipantScoreSummaries and participant selectors
  • Resume ViewModel extraction (2 services remaining)
  • Target: ~1,900 lines (coordinator role)

Tags

testing coverage lifecycle bug-fix viewmodel quality

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