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coverage

Collect and enforce code coverage using Deno

by sachitv|Open Source

What I do

  • Run deno task coverage to collect coverage data for the codebase
  • Can also collect coverage for a specific file using deno task coverage <filename>
  • Use deno task coverage:check to enforce coverage thresholds defined in .denocoveragerc
  • Use deno task serve:coverage to serve an HTML coverage report in the browser

When to use me

Use this when you want to measure or verify test coverage:

  • After adding new tests
  • Before submitting a pull request (coverage must meet 100% thresholds)
  • When debugging which areas of the code are under-tested
  • To inspect coverage gaps interactively

Notes

  • Coverage thresholds are defined in .denocoveragerc (100% for lines, branches, and functions)
  • Every test change must be accompanied by coverage that satisfies these thresholds
  • The HTML report is helpful for visualizing failing areas in complex serialization paths