bats-testing-patterns

# Bats Testing Patterns Comprehensive guidance for writing comprehensive unit tests for shell scripts using Bats (Bash Automated Testing System), including test patterns, fixtures, and best practices for production-grade shell testing. ## When to Use This Skill - Writing unit tests for shell scripts - Implementing test-driven development (TDD) for scripts - Setting up automated testing in CI/CD pipelines - Testing edge cases and error conditions - Validating behavior across different shell environments - Building maintainable test suites for scripts - Creating fixtures for complex test scenarios - Testing multiple shell dialects (bash, sh, dash) ## Bats Fundamentals ### What is Bats? Bats (Bash Automated Testing System) is a TAP (Test Anything Protocol) compliant testing framework for shell scripts that provides: - Simple, natural test syntax - TAP output format compatible with CI systems - Fixtures and setup/teardown support - Assertion helpers - Parallel test execution ### Installation ```bash # macOS with Homebrew brew install bats-core # Ubuntu/Debian git clone https://github.com/bats-core/bats-core.git cd bats-core ./install.sh /usr/local # From npm (Node.js) npm install --global bats # Verify installation bats --version ``` ### File Structure ``` project/ ├── bin/ │ ├── script.sh │ └── helper.sh ├── tests/ │ ├── test_script.bats │ ├── test_helper.sh │ ├── fixtures/ │ │ ├── input.txt │ │ └── expected_output.txt │ └── helpers/ │ └──...