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Coverage Pattern

Code coverage configuration with Vitest including thresholds, per-file rules, CI integration, and coverage analysis tooling.

What's Included#

  • Vitest V8 coverage provider with HTML, JSON, and lcov reporters
  • Global and per-file coverage thresholds for lines, branches, and functions
  • Istanbul and V8 ignore comments for untestable code paths
  • CI coverage gates with GitHub Actions and Codecov integration
  • Coverage report analysis script for finding low-coverage files and uncovered functions

Usage#

Via CLI#

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Via AI Assistant#

Ask your AI assistant:

  • "Use the coverage pattern from Bootspring"
  • "Apply the Bootspring coverage pattern to my project"

Key Considerations#

  • Focus on meaningful coverage rather than chasing 100% which encourages low-quality tests
  • Set 80% as a reasonable starting threshold and increase for critical code paths
  • Use branch coverage to ensure all conditional paths are tested, not just lines
  • Use ignore comments sparingly and only for legitimately untestable code
  • Track coverage trends over time rather than treating it as a pass/fail gate

Related Patterns#