test/test/message/test_runner_only_tests.js

Node.js 18's node:test, as an npm package

// https://github.com/nodejs/node/blob/1aab13cad9c800f4121c1d35b554b78c1b17bdbd/test/message/test_runner_only_tests.js
// Flags: --no-warnings --test-only
'use strict'
require('../common')
const test = require('#node:test')

// These tests should be skipped based on the 'only' option.
test('only = undefined')
test('only = undefined, skip = string', { skip: 'skip message' })
test('only = undefined, skip = true', { skip: true })
test('only = undefined, skip = false', { skip: false })
test('only = false', { only: false })
test('only = false, skip = string', { only: false, skip: 'skip message' })
test('only = false, skip = true', { only: false, skip: true })
test('only = false, skip = false', { only: false, skip: false })

// These tests should be skipped based on the 'skip' option.
test('only = true, skip = string', { only: true, skip: 'skip message' })
test('only = true, skip = true', { only: true, skip: true })

// An 'only' test with subtests.
test('only = true, with subtests', { only: true }, async (t) => {
  // These subtests should run.
  await t.test('running subtest 1')
  await t.test('running subtest 2')

  // Switch the context to only execute 'only' tests.
  t.runOnly(true)
  await t.test('skipped subtest 1')
  await t.test('skipped subtest 2')
  await t.test('running subtest 3', { only: true })

  // Switch the context back to execute all tests.
  t.runOnly(false)
  await t.test('running subtest 4', async (t) => {
    // These subtests should run.
    await t.test('running sub-subtest 1')
    await t.test('running sub-subtest 2')

    // Switch the context to only execute 'only' tests.
    t.runOnly(true)
    await t.test('skipped sub-subtest 1')
    await t.test('skipped sub-subtest 2')
  })

  // Explicitly do not run these tests.
  await t.test('skipped subtest 3', { only: false })
  await t.test('skipped subtest 4', { skip: true })
})