vitest/test/coverage-test/test/bundled-sources.test.ts

import libCoverage from 'istanbul-lib-coverage'
import { expect } from 'vitest'
import * as transpiled from '../fixtures/src/pre-bundle/bundle.js'
import { coverageTest, formatSummary, normalizeURL, readCoverageJson, runVitest, test } from '../utils'

test('bundled code with source maps to originals', async () => {
  await runVitest({
    include: [normalizeURL(import.meta.url)],
    coverage: {
      reporter: 'json',
      exclude: ['./utils.ts'],
    },
  })

  const coverageJson = await readCoverageJson()
  const coverageMap = libCoverage.createCoverageMap(coverageJson)

  // bundle.ts/bundle.js should not be included
  expect(coverageMap.files()).toMatchInlineSnapshot(`
    [
      "<process-cwd>/fixtures/src/pre-bundle/first.ts",
      "<process-cwd>/fixtures/src/pre-bundle/second.ts",
    ]
  `)

  const first = coverageMap.fileCoverageFor('<process-cwd>/fixtures/src/pre-bundle/first.ts')
  const second = coverageMap.fileCoverageFor('<process-cwd>/fixtures/src/pre-bundle/second.ts')

  const summary = {
    [first.path]: formatSummary(first.toSummary()),
    [second.path]: formatSummary(second.toSummary()),
  }

  expect(summary).toMatchInlineSnapshot(`
    {
      "<process-cwd>/fixtures/src/pre-bundle/first.ts": {
        "branches": "0/0 (100%)",
        "functions": "1/2 (50%)",
        "lines": "1/2 (50%)",
        "statements": "1/2 (50%)",
      },
      "<process-cwd>/fixtures/src/pre-bundle/second.ts": {
        "branches": "0/0 (100%)",
        "functions": "1/2 (50%)",
        "lines": "1/2 (50%)",
        "statements": "1/2 (50%)",
      },
    }
  `)
})

coverageTest('run bundled sources', () => {
  expect(transpiled.first.covered).toBeTypeOf('function')
  expect(transpiled.first.covered()).toBe('First')

  expect(transpiled.second.covered).toBeTypeOf('function')
  expect(transpiled.second.covered()).toBe('Second')
})