jest.config.js

// force timezone to UTC to allow tests to work regardless of local timezone
// generally used by snapshots, but can affect specific tests
process.env.TZ = 'UTC';

module.exports = {
  // Jest configuration provided by Grafana scaffolding
  ...require('./.config/jest.config'),
  // Async RTL tests (Advanced logs modal) do a real render + findBy* after a mocked fetch; under
  // the full parallel suite the first heavy test can exceed the 5s default. Logic is verified green
  // in isolation — raise the ceiling to avoid flaky timeouts.
  testTimeout: 15000,

  // Pin the coverage denominator to the whole frontend (issue #785).
  // Without this, Istanbul only counts files imported by some test, which
  // inflates the headline number over a small slice of the codebase.
  collectCoverageFrom: [
    'src/**/*.{ts,tsx}',
    '!src/**/*.{test,spec,jest}.{ts,tsx}',
    '!src/**/__mocks__/**',
    '!src/spec/testUtils/**',
    '!src/**/*.d.ts',
    // Pure static data (autocomplete metadata): thousands of LOC, ~5 statements, no logic.
    '!src/views/QueryEditor/components/QueryTextEditor/editor/autocompletions/functions.ts',
    '!src/views/QueryEditor/components/QueryTextEditor/editor/constants/funcs.ts',
  ],

  // Ratchet: floor measured 2026-08-10 (stmts 91.9 / branch 90.17 / func 82.18 / lines 92.68).
  // Raise these as coverage grows; never lower without a written justification.
  coverageThreshold: {
    global: {
      statements: 90,
      branches: 88,
      functions: 80,
      lines: 90,
    },
  },
};