finfocus: Instructions file for GitHub Copilot

Go Test Files Instructions

Test files follow specific patterns and requirements for this Go project.

Test Structure:

• Use _test.go suffix for test files
• Place test files in the same package as the code being tested
• Use descriptive test function names: TestXxx
• Use table-driven tests for multiple test cases
• Group related tests appropriately

Test Coverage Requirements:

• Achieve 80% minimum code coverage
• Test both success and error paths
• Include edge cases and boundary conditions
• Test error conditions and failure scenarios
• Verify proper error handling and propagation
• Test concurrent behavior with race detection

Testing Patterns:

• Use github.com/stretchr/testify for assertions
• Use require for fatal assertions, assert for non-fatal
• Mock external dependencies appropriately
• Use test helpers and setup/teardown functions
• Isolate tests to prevent interference

Test Organization:

• Use descriptive test names that explain what is being tested
• Group related test cases in table-driven tests
• Use subtests for complex scenarios
• Include benchmark tests where performance is critical
• Document test intent and expectations

CI/CD Integration:

• Tests run automatically in CI pipeline
• Coverage reports are generated and uploaded
• Race detection is enabled for concurrent code
• Test failures block merges

Mock and Stub Usage:

• Use interfaces for dependency injection
• Create mock implementations for external services
• Use test-specific fixtures and data
• Avoid testing implementation details

Performance Testing:

• Include benchmarks for performance-critical code
• Use testing.B for benchmark functions
• Profile memory usage and allocations
• Compare performance across changes