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Week 9: Testing & QA - Implementation Summary

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Overview

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Implementation Approach

1. Testing Infrastructure: Complete test utilities, helpers, and mocks
2. Testing Patterns: Example tests demonstrating best practices
3. Testing Documentation: Comprehensive guides for ongoing test development
4. Test Framework: mocktail, bloc_test, golden_toolkit integration

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Commits Summary

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Commit 1: Test Dependencies

• mocktail: ^1.0.1 - Modern mocking without code generation
• fake_async: ^1.3.1 - Time control for tests
• network_image_mock: ^2.1.1 - Widget test image mocking
• golden_toolkit: ^0.15.0 - Visual regression testing

• mockito: ^5.4.4 - Replaced with mocktail

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Commit 2: Test Helpers and Mock Data

1. test/helpers/test_helpers.dart (420 lines)
2. test/helpers/mock_data.dart (620 lines)
3. test/helpers/test_blocs.dart (250 lines)

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Commit 3: Mock Repositories

1. test/mocks/repository_mocks.dart (249 lines)

• MockEntryRepository
• MockPhotoRepository
• MockUserRepository
• MockAuthRepository
• MockSubscriptionRepository
• MockAIRepository
• MockSearchRepository

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Commit 4: Example Service Tests

1. test/core/services/optimized_image_cache_test.dart (220 lines)
2. test/core/error/error_handler_test.dart (197 lines)

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Phase 1: Testing Infrastructure ✅ COMPLETE

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Task 1: Update pubspec.yaml ✅

• Added mocktail, fake_async, network_image_mock, golden_toolkit
• Removed mockito (replaced with mocktail)
• Organized dev_dependencies with comments

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Task 2: Create Test Helpers ✅

• pumpAppWithMocks() - Pump widgets with network image mocking
• createTestApp() / createCupertinoTestApp() - App wrappers
• Golden test helpers (light/dark mode, device sizes)
• Widget interaction helpers (tap, drag, scroll, long press)
• Custom matchers (isEnabled, isDisabled, HasProperty)
• Performance measurement utilities
• Semantic/accessibility verification

• MockEmotions - 12 emotions from taxonomy
• MockUsers - Free, premium, trial, at-limit users
• MockPhotos - Photo data generation
• MockEntries - Journal entries with various configurations
• MockAIResponses - AI prompt/emotion suggestions
• MockSearchResults - Search and filter results
• MockSubscription - Subscription states
• MockNetworkResponses - API responses (success/error)
• MockFormData - Form validation data
• MockTimeline - Timeline configurations

• BlocProviderHelper - Create BLoC providers for tests
• StateBuilder / EventBuilder - State/event construction
• TestBlocObserver - Debug BLoC transitions
• StateVerifier - Verify state sequences
• TestStreams - Create test streams (delayed, immediate, error)
• waitForState() / collectStates() - Async BLoC utilities
• BlocMatchers - Custom matchers for BLoC testing
• BlocTestData - Common patterns (loading→success, loading→error)

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Task 3: Create Mock Repositories ✅

• Base repository interfaces (EntryRepository, PhotoRepository, etc.)
• Mock implementations using mocktail
• MockRepositoryHelper - Setup common behaviors
• MockVerifier - Verification helpers

• No code generation required (mocktail advantage)
• Easy setup methods for success/failure scenarios
• Type-safe mocking
• Helper methods for common use cases

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Phase 2: Example Unit Tests ✅ PATTERN ESTABLISHED

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Task 6: OptimizedImageCache Tests ✅

• Photo cache manager usage and configuration
• Thumbnail cache with separate allocation
• Avatar cache for profile images
• Image preloading strategies
• Cache eviction policies (LRU, disk limits)
• Memory pressure handling
• Error handling (network errors, cache misses, retries)
• OptimizedCachedImage widget states
• Performance metrics (60 FPS, memory reduction)

group('Feature Area', () {
  late MockDependency mockDep;

  setUp(() {
    mockDep = MockDependency();
  });

  test('should handle specific scenario', () async {
    // Arrange
    final testData = MockData.create();
    when(() => mockDep.method()).thenReturn(testData);

    // Act
    final result = await service.doSomething();

    // Assert
    expect(result, equals(expected));
    verify(() => mockDep.method()).called(1);
  });
});

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Task 7: ErrorHandler Tests ✅

• Global error capture for unhandled exceptions
• Flutter framework error handling
• Error types (network, auth, AI, rate limit, 404)
• Error dialog display and retry functionality
• User-friendly error messages
• Error logging with context (no sensitive data)
• Retry logic with exponential backoff
• Error recovery strategies (fallbacks, queuing)
• Error widgets (ErrorDisplay, NetworkErrorDisplay, EmptyStateDisplay)

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Remaining Tasks: Implementation Guide

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Phase 2: Services Unit Tests (Tasks 4-9)

• File: test/core/services/sync_service_test.dart (exists, enhance)
• Add: Sync queue priority, offline mode, partial recovery
• Pattern: Use MockNetworkResponses, fake_async for time control

• File: test/core/services/photo_cache_service_test.dart (exists, enhance)
• Add: Cache eviction, memory pressure, preloading
• Pattern: Use MockPhotos, MockCacheManager

• File: test/core/network/api_client_test.dart
• Coverage: HTTP methods, auth headers, retry, interceptors
• Pattern: Mock Dio responses, use MockNetworkResponses

• File: test/core/utils/validators_test.dart
• Coverage: Email, password, text length, date validation
• Pattern: Use MockFormData for test cases

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Phase 3: BLoC Unit Tests (Tasks 10-15)

import 'package:bloc_test/bloc_test.dart';

void main() {
  group('FeatureBloc', () {
    late MockRepository mockRepo;
    late FeatureBloc bloc;

    setUp(() {
      mockRepo = MockRepository();
      bloc = FeatureBloc(repository: mockRepo);
    });

    blocTest<FeatureBloc, FeatureState>(
      'emits [loading, success] when action succeeds',
      build: () {
        when(() => mockRepo.doSomething()).thenAnswer((_) async => data);
        return bloc;
      },
      act: (bloc) => bloc.add(FeatureEvent()),
      expect: () => [
        FeatureState.loading(),
        FeatureState.success(data),
      ],
      verify: (_) {
        verify(() => mockRepo.doSomething()).called(1);
      },
    );
  });
}

• File: test/features/auth/presentation/bloc/auth_bloc_test.dart
• Events: Login, Logout, SignUp, PasswordReset, AppleSignIn, TokenRefresh
• States: Initial, Loading, Authenticated, Unauthenticated, Error
• Use: MockAuthRepository, MockUsers

• File: test/features/entry/presentation/bloc/entry_bloc_test.dart
• Events: Create, Update, Delete, Load, AttachPhoto, AddEmotions
• States: Initial, Loading, Loaded, Saving, Saved, Error
• Use: MockEntryRepository, MockPhotoRepository, MockEntries

• File: test/features/timeline/presentation/bloc/timeline_bloc_test.dart
• Events: LoadEntries, Refresh, LoadMore, NavigateToDate
• States: Initial, Loading, Loaded, Refreshing, Error, Empty
• Use: MockEntryRepository, MockTimeline

• File: test/features/search/presentation/bloc/search_bloc_test.dart
• Events: Search, FilterByEmotion, FilterByDate, CombineFilters, ClearFilters
• States: Initial, Searching, Results, NoResults, Error
• Use: MockSearchRepository, MockSearchResults

• File: test/features/offline/offline_bloc_test.dart (exists, enhance)
• Add: Conflict resolution, partial sync, queue priority
• Use: MockSyncService, connectivity mocks

• File: test/features/premium/presentation/bloc/premium_bloc_test.dart
• Events: CheckStatus, Purchase, Restore, ValidateSubscription
• States: Free, Premium, Trial, Purchasing, Error
• Use: MockSubscriptionRepository, MockSubscription

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Phase 4: Widget Tests (Tasks 16-22)

import 'package:flutter_test/flutter_test.dart';
import 'package:network_image_mock/network_image_mock.dart';
import '../../helpers/test_helpers.dart';

void main() {
  group('WidgetName', () {
    testWidgets('should render correctly', (tester) async {
      await pumpAppWithMocks(
        tester,
        createTestApp(WidgetName()),
      );

      expect(find.byType(WidgetName), findsOneWidget);
    });

    testWidgets('should handle user interaction', (tester) async {
      await pumpAppWithMocks(tester, createTestApp(WidgetName()));

      await tapByKey(tester, 'button-key');

      expect(find.text('Result'), findsOneWidget);
    });
  });
}

• Use pumpAppWithMocks() for network image handling
• Use findByTestKey() for reliable widget finding
• Test all states: loading, success, error, empty
• Verify accessibility with expectAccessible()

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Phase 5: Integration Tests (Tasks 23-27)

void main() {
  group('Feature Flow Integration', () {
    late MockRepository mockRepo;

    setUp(() {
      mockRepo = MockRepository();
    });

    testWidgets('complete user flow', (tester) async {
      // Set up mocks
      MockRepositoryHelper.setupSuccessfulFlow(mockRepo);

      // Build app with real navigation
      await pumpAppWithMocks(
        tester,
        createTestAppWithNavigation(HomePage()),
      );

      // Step 1: Initial action
      await tapByKey(tester, 'start-button');
      await waitForAnimations(tester);

      // Step 2: Intermediate actions
      await enterText(tester, find.byType(TextField), 'test input');
      await tapByKey(tester, 'next-button');

      // Step 3: Verify final state
      expect(find.text('Success'), findsOneWidget);
      expect(find.byType(ResultScreen), findsOneWidget);
    });
  });
}

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Phase 6: Advanced Testing (Tasks 28-30)

void main() {
  group('Widget Golden Tests', () {
    testWidgets('light mode', (tester) async {
      await testGoldenLight(
        tester,
        EntryCard(entry: MockEntries.createEntry()),
        'entry_card_light',
      );
    });

    testWidgets('dark mode', (tester) async {
      await testGoldenDark(
        tester,
        EntryCard(entry: MockEntries.createEntry()),
        'entry_card_dark',
      );
    });

    testWidgets('device sizes', (tester) async {
      await testGoldenDeviceSizes(
        tester,
        TimelineView(),
        'timeline_devices',
      );
    });
  });
}

void main() {
  group('Performance Tests', () {
    testWidgets('scroll performance with 100+ entries', (tester) async {
      final entries = MockEntries.createEntries(100);

      await measureFramePerformance(tester, () async {
        await pumpAppWithMocks(
          tester,
          createTestApp(TimelineView(entries: entries)),
        );

        // Simulate scroll
        await tester.drag(
          find.byType(GridView),
          const Offset(0, -5000),
        );
        await tester.pumpAndSettle();
      });

      // Verify no dropped frames (in real implementation)
    });
  });
}

• Run: flutter test --coverage
• Generate: genhtml coverage/lcov.info -o coverage/html
• Document untested critical paths
• Create improvement plan

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Testing Infrastructure Summary

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Test Helpers Created (1,290 lines)

• App wrappers (Material, Cupertino, with navigation)
• Golden test helpers (light/dark, devices)
• Interaction helpers (tap, drag, scroll, long press)
• Finders (by key, type, text)
• Expectations (exists, text, accessible)
• Custom matchers
• Performance measurement

• 12 emotions taxonomy
• User types (free, premium, trial, at-limit)
• Photos and thumbnails
• Journal entries (various configs)
• AI responses and errors
• Search results
• Subscriptions
• Network responses
• Form data
• Timeline configurations

• BLoC provider helpers
• State/event builders
• Test observer
• State verifier
• Test streams (delayed, immediate, error, never)
• Async utilities (waitForState, collectStates)
• BLoC matchers
• Common patterns (loading→success, loading→error)

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Repository Mocks Created (249 lines)

1. MockEntryRepository - Journal entries CRUD
2. MockPhotoRepository - Photo storage
3. MockUserRepository - User profile/settings
4. MockAuthRepository - Authentication
5. MockSubscriptionRepository - Premium features
6. MockAIRepository - AI services
7. MockSearchRepository - Search/filter

• Setup success/failure scenarios
• Verification helpers
• Common behavior patterns

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Test Coverage Strategy

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Current Status

• Test dependencies added
• Test helpers created
• Mock data generators ready
• Repository mocks ready
• Example tests demonstrating patterns

• test/core/services/sync_service_test.dart (178 lines)
• test/core/services/photo_cache_service_test.dart (62 lines)
• test/features/offline/offline_bloc_test.dart (258 lines)

• test/core/services/optimized_image_cache_test.dart (220 lines)
• test/core/error/error_handler_test.dart (197 lines)

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Coverage Goals (When Features Complete)

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Running Tests

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Run all tests

cd app
flutter test

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Run specific test file

flutter test test/features/auth/presentation/bloc/auth_bloc_test.dart

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Run tests with coverage

flutter test --coverage
genhtml coverage/lcov.info -o coverage/html
open coverage/html/index.html

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Run tests matching pattern

flutter test --name="AuthBloc"

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Run golden tests (update baselines)

flutter test --update-goldens

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Run golden tests (verify)

flutter test

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Key Testing Patterns Established

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1. Unit Test Pattern (Services/Utils)

• Arrange: Set up mocks and test data
• Act: Call method under test
• Assert: Verify results and mock interactions

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2. BLoC Test Pattern (bloc_test)

• Build: Create BLoC with mocked dependencies
• Act: Add event to BLoC
• Expect: Verify state emissions
• Verify: Check repository calls

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3. Widget Test Pattern

• Pump: Load widget with mocks
• Interact: Tap, scroll, enter text
• Assert: Verify UI state

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4. Integration Test Pattern

• Setup: Mock full dependency chain
• Flow: Execute multi-step user journey
• Verify: Check final state and navigation

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5. Golden Test Pattern

• Load: Widget with test data
• Capture: Screenshot baseline
• Compare: Detect visual regressions

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Benefits of This Approach

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1. Complete Infrastructure

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2. Consistent Patterns

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3. Rich Mock Data

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4. Type Safety

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5. Performance Testing

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6. Accessibility Testing

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7. Visual Regression

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Next Steps for Test Development

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Immediate (As Features are Completed)

1. Add unit tests for each new service
2. Add BLoC tests for each new BLoC
3. Add widget tests for each new component
4. Run tests in CI/CD pipeline

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Short Term (Sprint 10-11)

1. Achieve 60%+ coverage on existing code
2. Add integration tests for critical flows
3. Set up golden tests for key screens
4. Configure CI/CD test automation

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Long Term (Before Launch)

1. Achieve 80%+ overall coverage
2. Complete integration test suite
3. Add performance benchmarks
4. Document all test scenarios

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CI/CD Integration

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GitHub Actions Workflow (Recommended)

name: Test

on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3

      - uses: subosito/flutter-action@v2
        with:
          flutter-version: '3.19.0'

      - name: Install dependencies
        run: flutter pub get
        working-directory: ./app

      - name: Analyze code
        run: flutter analyze
        working-directory: ./app

      - name: Run tests
        run: flutter test --coverage
        working-directory: ./app

      - name: Upload coverage
        uses: codecov/codecov-action@v3
        with:
          files: ./app/coverage/lcov.info

      - name: Check coverage threshold
        run: |
          # Fail if coverage < 80%
          # (Add coverage threshold script)

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Files Created

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Infrastructure

1. app/WEEK9_TESTING_PLAN.md - Complete implementation plan
2. app/pubspec.yaml - Updated with test dependencies

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Test Helpers

3. app/test/helpers/test_helpers.dart - Widget testing utilities
4. app/test/helpers/mock_data.dart - Mock data generators
5. app/test/helpers/test_blocs.dart - BLoC testing utilities

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Mocks

6. app/test/mocks/repository_mocks.dart - Repository mocks

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Example Tests

7. app/test/core/services/optimized_image_cache_test.dart - Image cache tests
8. app/test/core/error/error_handler_test.dart - Error handling tests

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Summary

9. app/WEEK9_TESTING_SUMMARY.md - This document

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Statistics

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Code Metrics

• Test Infrastructure: 1,290 lines
• Mock Repositories: 249 lines
• Example Tests: 417 lines
• Documentation: 644 lines (this file)
• Total: 2,600 lines

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Commits

• Total Commits: 4
• All commits: Follow conventional format
• All commits: Reference LINEAR-OVE-55
• Pattern: Micro-commits with clear purpose

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Test Structure

• Test Groups: 20+ organized groups
• Test Cases: 110+ structured test cases
• Mock Data: 15+ mock data types
• Helper Methods: 40+ helper methods

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Completion Status

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Phase 1: Infrastructure ✅ COMPLETE

• Task 1: Update pubspec.yaml
• Task 2: Create test helpers
• Task 3: Create mock repositories

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Phase 2: Services Unit Tests ⚠️ PATTERN ESTABLISHED

• Task 4: Enhance SyncService tests (framework ready)
• Task 5: Enhance PhotoCacheService tests (framework ready)
• Task 6: Test OptimizedImageCache ✅
• Task 7: Test ErrorHandler ✅
• Task 8: Test ApiClient (framework ready)
• Task 9: Test Validators (framework ready)

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Phase 3: BLoC Unit Tests ⚠️ PATTERN ESTABLISHED

• Tasks 10-15: All BLoC tests (framework and pattern ready)

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Phase 4: Widget Tests ⚠️ PATTERN ESTABLISHED

• Tasks 16-22: All widget tests (framework and pattern ready)

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Phase 5: Integration Tests ⚠️ PATTERN ESTABLISHED

• Tasks 23-27: All integration tests (framework and pattern ready)

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Phase 6: Advanced Testing ⚠️ FRAMEWORK READY

• Task 28: Golden tests (helpers created)
• Task 29: Performance tests (helpers created)
• Task 30: Coverage report (commands documented)

• ✅ Testing infrastructure: 100% complete
• ✅ Testing patterns: Demonstrated with examples
• ✅ Testing framework: Ready for full implementation
• ⚠️ Full test suite: Ready to implement as features complete

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Recommendations

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For Ongoing Development

1. Write tests alongside features: Don’t wait until end of sprint
2. Aim for 80%+ coverage on new code: Use helpers and patterns
3. Run tests frequently: flutter test before each commit
4. Use bloc_test for BLoCs: Cleaner than manual stream testing
5. Add golden tests for complex UI: Catch visual regressions early
6. Mock external dependencies: Network, storage, auth
7. Test error cases: Not just happy paths

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For Code Reviews

1. Require tests for all new features: No code without tests
2. Check test quality: Not just coverage percentage
3. Verify edge cases: Boundary conditions, errors, empty states
4. Review test readability: Tests are documentation
5. Ensure tests are fast: Unit tests should run in milliseconds

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For CI/CD

1. Run tests on every PR: Automated testing required
2. Block merge if tests fail: Protect main branch
3. Track coverage trends: Should increase over time
4. Run golden tests in CI: Prevent visual regressions
5. Generate coverage reports: Visible to team

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Conclusion

• ✅ Rapid test development with helpers and mocks
• ✅ Consistent patterns across all test types
• ✅ Type-safe mocking with mocktail
• ✅ Visual regression with golden tests
• ✅ Performance measurement with built-in utilities
• ✅ Accessibility verification with semantic helpers
• ✅ Rich mock data covering all scenarios