6. Testing & Quality Assurance

Test Coverage Overview

Current Test Coverage: 0%

6.1 Unit Tests

Status: ❌Fail

Findings:

• No unit tests are present in the codebase
• Business logic components lack test coverage
• No test directory structure exists (test/ folder is missing)
• Critical business logic in models, helpers, and state management is untested
• No test dependencies configured in pubspec.yaml

Evidence:

• No test/ directory found in project root
• No *_test.dart files found in codebase
• Business logic files in lib/models/, lib/helpers/, lib/states/ have no corresponding tests
• No test dependencies in pubspec.yaml dev_dependencies (no flutter_test, mockito, mocktail, etc.)
• Helper functions in lib/helpers/ (e.g., color_helpers.dart, file_helpers.dart, general_helpers.dart, location_helpers.dart) are untested
• State management classes in lib/states/ (e.g., session_state.dart, connectivity_state.dart, register_state.dart, saving_state.dart, favorite_gas_station_state.dart) are untested
• Critical business logic in models (15+ model files) has no test coverage
• Route models in lib/route_models/ (30+ files) have no test coverage
• Singleton classes in lib/singletons/ have no test coverage

Risk Level: High Risk

Recommendation:

• Immediate actions:
• Create test/ directory structure
• Add test dependencies to pubspec.yaml (flutter_test, mockito or mocktail)
• Create comprehensive unit tests for business logic components
• Focus on testing models, helpers, utilities, and state management logic
• Short-term:
• Use mocking frameworks (e.g., mockito or mocktail) to isolate units under test
• Test critical business logic in models and route models
• Test state management classes and their state transitions
• Test helper functions for edge cases and error handling

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6.2 Integration Tests

Status: ❌Fail

Findings:

• No integration tests exist in the codebase
• API integration with backend services is untested
• Database operations (Drift/SQLite) lack integration test coverage
• No tests for end-to-end user flows
• OAuth2 authentication flow is untested

Evidence:

• No integration test files found
• Dio singleton (lib/singletons/dio_singleton.dart) has no integration tests
• Database layer (lib/database/) has no integration tests
• No test infrastructure for staging environment integration
• OAuth2 authentication flow (lib/singletons/dio_singleton.dart token refresh logic, lines 54-92) is untested
• API endpoints defined via Retrofit have no integration test coverage
• Database operations using Drift/SQLite have no test coverage
• Route models that interact with API have no integration tests

Risk Level: High Risk

Recommendation:

• Immediate actions:
• Create integration test directory structure (integration_test/)
• Implement integration tests with mock data for API responses
• Add integration tests that connect to staging environment for real API validation
• Short-term:
• Test database operations with in-memory databases
• Create test fixtures and mock data factories
• Test critical user journeys (authentication, data synchronization, gas station search, etc.)
• Test OAuth2 token refresh flow
• Test API error handling and retry logic

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6.3 UI/Widget Tests

Status: ❌Fail

Findings:

• No widget tests exist in the codebase
• No golden tests (visual regression tests) are implemented
• UI components in lib/widgets/ and lib/routes/ are untested
• No mechanism to detect UI regressions when making changes

Evidence:

• No widget test files found
• No golden test files (.png golden files) in test directory
• Widget components have no test coverage
• No flutter_test configuration for UI testing (only transitive dependency in pubspec.lock)
• 30+ widget files in lib/widgets/ are untested
• 30+ route files in lib/routes/ (screen implementations) are untested
• No visual regression testing to detect UI changes
• No widget testing framework configured in pubspec.yaml
• Complex widgets like gas_station.dart, count_down_timer_widget.dart, navigation_drawer.dart have no tests

Risk Level: High Risk

Recommendation:

• Immediate actions:
• Add flutter_test to dev_dependencies in pubspec.yaml
• Implement golden tests (visual regression tests) to ensure UI consistency
• Create widget tests for reusable components in lib/widgets/
• Short-term:
• Use golden_toolkit package for Flutter golden testing
• Test critical UI flows and screens (login, registration, gas station search, etc.)
• Set up CI/CD pipeline to run golden tests and detect visual regressions
• Store golden files in version control for comparison
• Test widget interactions and user input handling
• Test state-dependent UI rendering

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