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test-changed

Testing & quality

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Updated 10-16 09:35

About this skill

Run Tests for Changed Files

Run e2e and unit tests that are relevant to the files changed on the current branch.

Test Configuration

  • Unit (Jest): Config in jest.config.js, path aliases via moduleNameMapper
  • E2E (Playwright): Config in playwright.config.ts, Chromium only, 20s timeout per test, 2 retries, 2 workers
  • E2E dev server: Playwright starts pnpm dev automatically, but reuseExistingServer: true in non-CI — a stale server from another branch will cause false failures

Steps

  1. Kill any stale dev server on port 3000 before running e2e tests. Playwright's reuseExistingServer will pick up a server from a different branch otherwise, causing false failures (especially in worktrees): 
    lsof -ti:3000 | xargs kill -9 2>/dev/null; true

  1. Find changed files relative to main:

    git diff --name-only main...HEAD
git diff --name-only          # unstaged
git diff --name-only --cached # staged

  2. Map source changes to test files. Use these rules:

    • src/app/(sidebar)/transaction/build/** -> tests/e2e/buildTransaction.test.ts, tests/e2e/savedTransactions.test.ts, tests/e2e/urlParams.test.ts
    • src/app/(sidebar)/transaction/sign/** -> tests/e2e/signTransactionPage.test.ts
    • src/app/(sidebar)/transaction/submit/** -> tests/e2e/submitTransactionPage.test.ts
    • src/app/(sidebar)/transaction/simulate/** -> tests/e2e/simulateTransactionPage.test.ts
    • src/app/(sidebar)/transaction/fee-bump/** -> tests/e2e/feeBumpTransactionPage.test.ts
    • src/app/(sidebar)/account/fund/** or src/app/(sidebar)/account/create/** -> tests/e2e/fundAccountPage.test.ts, tests/e2e/createAccountPage.test.ts
    • src/app/(sidebar)/xdr/** -> tests/e2e/viewXdrToJsonPage.test.ts, tests/e2e/jsonToXdrPage.test.ts
    • src/app/(sidebar)/endpoints/** -> tests/e2e/endpointsPage*.test.ts
    • src/app/(sidebar)/smart-contracts/** -> tests/e2e/contractExplorer*.test.ts
    • Shared code — run ALL e2e tests: src/components/**, src/helpers/**, src/hooks/**, src/store/**, src/constants/**, src/types/**, src/validate/**, src/styles/**, src/middleware.ts
    • tests/e2e/mock/** -> run ALL e2e tests that import from mock/
    • tests/e2e/*.test.ts changed directly -> run those tests
    • tests/unit/** changed -> run unit tests
    • If source files under src/helpers/ or src/validate/ changed, also check tests/unit/ for matching unit tests

  3. If XDR encoding or transaction building logic changed (e.g. ClassicTransactionXdr.tsx, SorobanTransactionXdr.tsx, src/helpers/xdr/), hardcoded hash/XDR values in tests may need updating. Flag this to the user before running tests.

  4. Run the identified tests:

    • E2E: npx playwright test <file1> <file2> ... --retries=0 --reporter=list
    • Unit: pnpm test:unit <file>
    • If no specific tests identified, run the full suite: pnpm test:e2e and pnpm test:unit

  5. Report results. Show pass/fail counts and list any failures with their error messages. For failures, read the relevant test code and source code to suggest fixes.