Package Exports

stdstream-snapshot
stdstream-snapshot/target/bundle/stdstream-snapshot.js
stdstream-snapshot/target/bundle/stdstream-snapshot.mjs

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (stdstream-snapshot) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

@qiwi/stdstream-snapshot

Util for CLI testing: fetch stdout, stderr streams and match its data to snapshot

Install

yarn add @qiwi/stdstream-snapshot -D
npm add @qiwi/stdstream-snapshot -D

Snapshot

{
  "stderr": "",
  "stdout": "/rules/some-rules.ts\n    2:7   error  'name'...",
  "err": {
    "signal": null,
    "code": 1,
    "killed": false
  }
}

Usage

With Jest:

import {generateSnapshot} from 'stdstream-snapshot'

it('cmd output matches to snapshot', async () => {
  const cmd = 'somecmd --flag=foo -b'
  const result = await generateSnapshot({
    cmd,
  })

  expect(result).toMatchSnapshot()
})

With Jasmine or another test framework with no built-it snapshot API:

import {matchSnapshot} from 'stdstream-snapshot'

it('cmd output matches to snapshot', async () => {
  const cmd = 'somecmd --flag=foo -b'
  const target = './test/snapshots/some-cmd-output.json'
  const result = await matchSnapshot({
    cmd,
    target,
    update: !!process.env.UPDATE_SNAPSHOT
  })

  expect(result).toBe(true)
})

Options

There are several normalization steps supported out of box.

Option	Description	Default
`trim`	Removes redundant spaces from both ends of strings	true
`normalizePaths`	Replaces `process.cwd()` prefix from any found paths in the output strings	true
`normalizeSpaces`	Converts tabs to double spaces	true
`normalizeEncoding`	Replaces output rubbish like `[8m [10m`	true

License

MIT