find-test-names

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

Install

1# install using NPM, probably as a dev dependency
2$ npm i -D find-test-names
3# install using Yarn
4$ yarn add -D find-test-names

Use

1const { getTestNames } = require('find-test-names')
2const result = getTestNames(specSourceCode)
3// { "suiteNames": [], "testNames": [], "tests": [] }

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

1// spec.js
2it('works', {tags: ['@user']}, () => { ... })
3// found test names
4// { tests: [{ name: 'works', tags: ['@user'] }] }

withStructure

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

1const result = getTestNames(specSourceCode, true)
2// 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.

1// example spec code
2describe('parent', { tags: '@user' }, () => {
3  describe('parent', { tags: '@auth' }, () => {
4    it('works a', { tags: '@one' }, () => {})
5    it('works b', () => {})
6  })
7})

1const { getTestNames, setEffectiveTags } = require('find-test-names')
2const result = getTestNames(source, true)
3setEffectiveTags(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:

1const {
2  getTestNames,
3  setEffectiveTags,
4  filterByEffectiveTags,
5} = require('find-test-names')
6const result = getTestNames(source, true)
7setEffectiveTags(result.structure)
8const tests = filterByEffectiveTags(result.structure, ['@one'])

Returns individual test objects.

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

1const filtered = filterByEffectiveTags(source, ['@user'])

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.

requiredTags

The test and suite options object can have another list of tags called requiredTags

1it(
2  'works a',
3  {
4    tags: '@one',
5    requiredTags: ['@data'],
6  },
7  () => {},
8)

These tags also will be extracted and the effective required tags from the parent suites applied to the children tests.

Supports

• JSX in the source code
• TypeScript

tag variables

Typically, test tags are static literals, like

1it('works', { tags: '@user' })

But sometimes you want to use variables to set them. To be able to statically analyze the source files, this package currently supports:

• local constants

1const USER = '@user'
2
3// in the same file
4it('works', { tags: USER })
5it('works', { tags: ['@sanity', USER] })

• local objects with literal property access

1const TAGS = {
2  user: '@user',
3}
4
5// in the same file
6it('works', { tags: TAGS.user })
7it('works', { tags: ['@sanity', TAGS.user] })

Bin

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

1$ npx find-test-names <path to the spec file>
2# prints the describe and test names found in the spec file

print-tests

Print found suites an tests

1$ 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

Exclusive tests are shown with > character like this:

├─ first
├> second
└─ last

If there are tags, they are shown after the name

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

If there are required test tags, they are shown after the test name using double brackets [[ ]]

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

Unknown test names

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

1// test name is a variable, not a literal string
2const testName = 'nice'
3it(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

1// line 1
2// line 2
3// line 3
4it('works', ...)
5// extracted test object will have
6// name: "works",
7// comment: "line 3"

Debugging

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

$ DEBUG=find-test-names npx find-test-names
...
2023-02-28T12:45:21.074Z find-test-names parsing source as a script
2023-02-28T12:45:21.083Z find-test-names success!
2023-02-28T12:45:21.084Z find-test-names found test "has jsx component"
2023-02-28T12:45:21.084Z find-test-names found describe "parent"

Small print

Author: Gleb Bahmutov <gleb.bahmutov@gmail.com> © 2021

• @bahmutov
• glebbahmutov.com
• blog
• videos
• presentations
• cypress.tips
• Cypress Tips & Tricks Newsletter
• my Cypress courses

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) 2021 Gleb Bahmutov <gleb.bahmutov@gmail.com>

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.