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carlos-algms / agentic-testing

mini.test red/green loop, revert check, and which test references to load. Use before creating, editing, or reviewing tests, and before TDD behavior changes.

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SKILL.md
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Agentic Testing

The rules are in tests/AGENTS.md. Read it first. This skill holds the
procedure.

TDD procedure

For every bug fix or behavioral change:

  1. Bootstrap missing symbols first so the test loads.
  2. Write the failing assertion.

  3. Run make test-file FILE=<path> and confirm it fails for behavior, not
    setup:

    1. wrong: missing module, nil method, syntax error, unresolved import
    2. right: value/state/output mismatch
  4. Implement the minimum code to pass.
  5. Fix and re-run make test-file FILE=<path> until green.

  6. Revert check: undo the fix (keep the test), run
    make test-file FILE=<path>, and confirm red. Restore the fix. Still green
    with the fix undone = the test does not discriminate; rewrite it (see "A
    test must be able to fail" in tests/AGENTS.md). A test that exists only to
    force a type check goes red under make luals, not make test-file; run
    the revert check there.

Use make test-file FILE=<path> for the whole loop. It runs one file in
seconds.

Load references only when needed

  • references/assert-spy.md: custom assert, spy, and stub API details
  • references/child-nvim.md: child process tests and RPC helpers
  • references/async-tests.md: scheduled and deferred code