cypress-select-tests

cypress-select-tests

DEPRECATED

You probably want to use cypress-grep instead: no TypeScript or JavaScript parsing problems.

OLD README

User space solution for picking Cypress tests to run

Install

Assuming Cypress has been installed:

npm install --save-dev cypress-select-tests

Warning ⚠️

• this package assumes JavaScript specs
• this package might conflict and/or overwrite other Cypress Browserify preprocessor settings

Mocha-like selection

Mocha has --fgrep, --grep and --invert CLI arguments to select spec files and tests to run. This package provides imitation using strings. In your cypress/plugins/index.js use:

const selectTestsWithGrep = require('cypress-select-tests/grep')
module.exports = (on, config) => {
  on('file:preprocessor', selectTestsWithGrep(config))
}

Then open or run Cypress and use environment variables to pass strings to find. There are various ways to pass environment variables, here is via CLI arguments:

 ## run tests with "works" in their full titles
 $ npx cypress open --env grep=works
 ## runs only specs with "foo" in their filename
 $ npx cypress run --env fgrep=foo
 ## runs only tests with "works" from specs with "foo"
 $ npx cypress run --env fgrep=foo,grep=works
 ## runs tests with "feature A" in the title
 $ npx cypress run --env grep='feature A'
 ## runs only specs NOT with "foo" in their filename
 $ npx cypress run --env fgrep=foo,invert=true
 ## runs tests NOT with "feature A" in the title
 $ npx cypress run --env grep='feature A',invert=true

The test picking function is available by itself in src/grep-pick-tests.js file.

Write your own selection logic

In your cypress/plugins/index.js use this module as a file preprocessor and write your own pickTests function.

const selectTests = require('cypress-select-tests')

// return test names you want to run
const pickTests = (filename, foundTests, cypressConfig) => {
  // found tests will be names of the tests found in "filename" spec
  // it is a list of names, each name an Array of strings
  // ['suite 1', 'suite 2', ..., 'test name']

  // return [] to skip ALL tests
  // OR
  // let's only run tests with "does" in the title
  return foundTests.filter(fullTestName => fullTestName.join(' ').includes('does'))
}

module.exports = (on, config) => {
  on('file:preprocessor', selectTests(config, pickTests))
}

Using pickTests allows you to implement your own test selection logic. All tests filtered out will be shown / counted as pending.

Combine custom browserify with grep picker

If you are adjusting Browserify options, and would like to use the above Mocha-like grep test picker, see test/plugin-browserify-with-grep.js file. In essence, you want add the grep transform to the list of Browserify plugins. Something like

const browserify = require('@cypress/browserify-preprocessor')
// utility function to process source in browserify
const itify = require('cypress-select-tests/src/itify')
// actual picking tests based on environment variables in the config file
const { grepPickTests } = require('cypress-select-tests/src/grep-pick-tests')

module.exports = (on, config) => {
  let customBrowserify

  // get the browserify options, then push another transform
  options.browserifyOptions.transform.push(itify(config, grepPickTests))
  customBrowserify = browserify(options)

  on('file:preprocessor', file => customBrowserify(file))
}

Examples

• cypress-select-tests-example
• cypress-example-recipes grep

Debugging

To see additional debugging output run

DEBUG=cypress-select-tests npx cypress open

Small print

Author: Gleb Bahmutov <[e-mail]> © 2019

• @bahmutov
• glebbahmutov.com
• blog

License: MIT - do anything with the code, but don't blame me if it does not work.

Support: if you find any problems with this module, email / tweet / open issue on Github

MIT License

Copyright (c) 2019 Gleb Bahmutov <[e-mail]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.