Integration Tests

Write integration tests that verify interactions across component boundaries.

Test Creation Checklist

Component Interaction

• Test communication between modules through real interfaces
• Verify dependency injection wiring produces correct collaborators
• Check event propagation across component boundaries
• Validate callback and listener invocation order
• Confirm proper lifecycle management between components

API Contract Verification

• Test request/response format compliance with specifications
• Verify HTTP status codes for success, error, and edge cases
• Check header handling (authentication, content-type, caching)
• Validate pagination, filtering, and sorting parameters
• Test versioning and backward compatibility of endpoints

Database Transaction Testing

• Verify CRUD operations produce correct persistent state
• Test transaction rollback on failure conditions
• Check concurrent access and locking behavior
• Validate migration scripts apply cleanly on test data
• Confirm cascade operations (delete, update) work correctly

End-to-End Flow

• Trace data from input through all processing layers to output
• Verify data transformation accuracy at each boundary
• Test complete user workflows spanning multiple services
• Check that error states propagate correctly across layers
• Validate cleanup and resource release after flow completion

Output Format

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