find-test-names-tags-mocha

find-test-names-tags-mocha

Given a Mocha / Cypress spec file, returns the list of suite and test names

Install

# install using NPM, probably as a dev dependency
$ npm i -D find-test-names-tags-mocha
# install using Yarn
$ yarn add -D find-test-names-tags-mocha

Use

const { getTestNames } = require('find-test-names-tags-mocha')
const result = getTestNames(specSourceCode)
// { "suiteNames": [], "testNames": [], "tests": [] }

The tests is a list with each test and suite name, and optional list of tags.

// spec.js
it('works -@ @user', () => { ... })
// found test names
// { tests: [{ name: 'works', tags: ['@user'] }] }

withStructure

You can get the entire structure of suites and tests by passing true argument

const result = getTestNames(specSourceCode, true)
// use the result.structure array

To view this in action, use npm run demo-structure which points at bin/find-tests.js

Pending tests

The tests it.skip are extracted and have the property pending: true

setEffectiveTags

Often, you want to have each test and see which tags it has and what parent tags apply to it. You can compute for each test a list of effective tags and set it for each test.

// example spec code
describe('parent -@ @user', () => {
  describe('parent -@ @auth', () => {
    it('works a -@ @one', () => {})
    it('works b -@ @one,@two', () => {})
  })
})

const { getTestNames, setEffectiveTags } = require('find-test-names-tags-mocha')
const result = getTestNames(source, true)
setEffectiveTags(result.structure)

If you traverse the result.structure, the test "works a" will have the effectiveTags list with @user, @auth, @one, and the test "works b" will have the effectiveTags list with @user, @auth, @one.

filterByEffectiveTags

Once you setEffectiveTags, you can filter all tests by an effective tag. For example, to fid all tests with the given tag(@one) and without other tags(@two):

const {
  getTestNames,
  setEffectiveTags,
  filterByEffectiveTags,
} = require('find-test-names-tags-mocha')
const result = getTestNames(source, true)
setEffectiveTags(result.structure)
const tests = filterByEffectiveTags(result.structure, ['@one'], ['@two'])

Returns individual test objects.

Tip: you can pass the source code and the tags to the filterByEffectiveTags function and let it parse it

const filtered = filterByEffectiveTags(source, ['@user'], ['@two'])

findEffectiveTestTags

Returns a single object with full test titles as keys. For each key, the value is the list of effective tags. See the find-effective-tags.js spec file.

findEffectiveTestTagsIn

You can use the utility method findEffectiveTestTagsIn(filename) to let this module read the file from disk and find the effective tags that apply to each test by its full title.

Bin

This package includes bin/find-test-names.js that you can use from the command line

$ npx find-test-names <path to the spec file>
# prints the describe and test names found in the spec file

print-tests

Print found suites an tests

$ npx print-tests <spec pattern>

For example, in this repo

$ npx print-tests 'test-cy/**/*.js'

test-cy/spec-a.js
└─ Suite A
  ├─ works 1
  └─ works 2

test-cy/spec-b.js
└─ Suite B
  ├─ works 1
  └─ works 2

Pending tests and suites are marked with ⊙ character like this:

├─ first
├⊙ second
└⊙ last

If there are tags, they are shown after the name

├─ first [tag1, tag2]
├─ second [@sanity]
└─ last

Unknown test names

Sometimes a test name comes from a variable, not from a literal string.

// test name is a variable, not a literal string
const testName = 'nice'
it(testName, () => {})

In that case, the tags are still extracted. When printing, such tests have name <unknown test>.

comment lines

If the test function has preceding comment lines, the comment line right before the test is extracted and included

// line 1
// line 2
// line 3
it('works', ...)
// extracted test object will have
// name: "works",
// comment: "line 3"

Debugging

Run with the environment variable DEBUG=find-test-names-tags-mocha to see verbose logs

Small print

Author: Manuel Buslon <[e-mail]> © 2022

MIT License

Copyright (c) 2022 Manuel Buslon <[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.

Acknowledgments

• Gleb Bahmutov, owner of the find-test-names repository that was forked.