Function mockDiff

deps/npm/test/lib/commands/diff.js:20–86

(t, {
  exec,
  diff = [],
  tarballs = {},
  times = {},
  ...opts
} = {})

// generic helper to call diff with a specified dir contents and registry calls
const mockDiff = async (t, {
  exec,
  diff = [],
  tarballs = {},
  times = {},
  ...opts
} = {}) => {
  const tarballFixtures = Object.entries(tarballs).reduce((acc, [spec, fixture]) => {
    const lastAt = spec.lastIndexOf('@')
    const name = spec.slice(0, lastAt)
    const version = spec.slice(lastAt + 1)
    acc[name] = acc[name] || {}
    acc[name][version] = fixture
    if (!acc[name][version]['package.json']) {
      acc[name][version]['package.json'] = { name, version }
    } else {
      acc[name][version]['package.json'].name = name
      acc[name][version]['package.json'].version = version
    }
    return acc
  }, {})

  const { prefixDir, globalPrefixDir, otherDirs, config, ...rest } = opts
  const { npm, ...res } = await loadMockNpm(t, {
    command: 'diff',
    prefixDir: jsonifyTestdir(prefixDir),
    otherDirs: jsonifyTestdir({ tarballs: tarballFixtures, ...otherDirs }),
    globalPrefixDir: jsonifyTestdir(globalPrefixDir),
    config: {
      ...config,
      diff: [].concat(diff),
    },
    ...rest,
  })

  const registry = new MockRegistry({
    tap: t,
    registry: npm.config.get('registry'),
    strict: true,
    debug: true,
  })

  const manifests = Object.entries(tarballFixtures).reduce((acc, [name, versions]) => {
    acc[name] = registry.manifest({
      name,
      packuments: Object.keys(versions).map((version) => ({ version })),
    })
    return acc
  }, {})

  for (const [name, manifest] of Object.entries(manifests)) {
    await registry.package({ manifest, times: times[name] ?? 1 })
    for (const [version, tarballManifest] of Object.entries(manifest.versions)) {
      await registry.tarball({
        manifest: tarballManifest,
        tarball: join(res.other, 'tarballs', name, version),
      })
    }