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Gathering detailed insights and metrics for eslint-plugin-jest

The total size of the npm registry is estimated to be over 4 terabytes. This includes all the packages, versions, and metadata stored in the registry.

eslint-plugin-jest

ESLint plugin for Jest

28.9.0

1,135

MIT

TypeScript

2.13 kB

1,783,500,299

4.8

Installations

npm install eslint-plugin-jest

Score

60.3

Supply Chain

60.3

Quality

91.7

Maintenance

100

Vulnerability

96.1

License

Pull Requests

Open

4

Total

1,255

Closed

226

Merged

1,025

Issues

Open

27

Total

413

Closed

386

Releases

285

v28.9.0

Published on 05 Nov 2024

v28.8.3

Published on 04 Sept 2024

v28.8.2

Published on 02 Sept 2024

v28.8.1

Published on 29 Aug 2024

v28.8.0

Published on 07 Aug 2024

v28.7.0

Published on 03 Aug 2024

View all 285 releases

Developer

jest-community

Module System

BETA

CommonJS

Statistics

1,135 Stars

1,428 Commits

236 Forks

12 Watching

5 Branches

140 Contributors

Updated on 18 Nov 2024

Bundle Size

5.38 kB

Minified

2.13 kB

Minified + Gzipped

Bundlephobia

Languages

TypeScript (98.06%)

JavaScript (1.94%)

Shell (0.01%)

Total Downloads

Cumulative downloads

Total Downloads

1,783,500,299

Last day

11.8%

2,399,522

Compared to previous day

Last week

7.3%

12,824,627

Compared to previous week

Last month

7.6%

51,805,048

Compared to previous month

Last year

11.5%

541,403,190

Compared to previous year

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

@typescript-eslint/utils

Peer Dependencies

@typescript-eslint/eslint-plugin eslint jest

Dev Dependencies

Versions

eslint-plugin-jest

ESLint plugin for Jest

Installation

1yarn add --dev eslint eslint-plugin-jest

Note: If you installed ESLint globally then you must also install eslint-plugin-jest globally.

Usage

If you're using flat configuration:

With flat configuration, just import the plugin and away you go:

1const pluginJest = require('eslint-plugin-jest');
2
3module.exports = [
4  {
5    // update this to match your test files
6    files: ['**/*.spec.js', '**/*.test.js'],
7    plugins: { jest: pluginJest },
8    languageOptions: {
9      globals: pluginJest.environments.globals.globals,
10    },
11    rules: {
12      'jest/no-disabled-tests': 'warn',
13      'jest/no-focused-tests': 'error',
14      'jest/no-identical-title': 'error',
15      'jest/prefer-to-have-length': 'warn',
16      'jest/valid-expect': 'error',
17    },
18  },
19];

With legacy configuration, add jest to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

1{
2  "plugins": ["jest"],
3  "env": {
4    "jest/globals": true
5  },
6  "rules": {
7    "jest/no-disabled-tests": "warn",
8    "jest/no-focused-tests": "error",
9    "jest/no-identical-title": "error",
10    "jest/prefer-to-have-length": "warn",
11    "jest/valid-expect": "error"
12  }
13}

[!NOTE]

You only need to explicitly include our globals if you're not using one of our shared configs

Aliased Jest globals

You can tell this plugin about any global Jests you have aliased using the globalAliases setting:

1{
2  "settings": {
3    "jest": {
4      "globalAliases": {
5        "describe": ["context"],
6        "fdescribe": ["fcontext"],
7        "xdescribe": ["xcontext"]
8      }
9    }
10  }
11}

Aliased `@jest/globals`

You can tell this plugin to treat a different package as the source of Jest globals using the globalPackage setting:

1{
2  "settings": {
3    "jest": {
4      "globalPackage": "bun:test"
5    }
6  }
7}

[!WARNING]

While this can be used to apply rules when using alternative testing libraries and frameworks like bun, vitest and node, there's no guarantee the semantics this plugin assumes will hold outside of Jest

Running rules only on test-related files

The rules provided by this plugin assume that the files they are checking are test-related. This means it's generally not suitable to include them in your top-level configuration as that applies to all files being linted which can include source files.

For .eslintrc configs you can use overrides to have ESLint apply additional rules to specific files:

1{
2  "extends": ["eslint:recommended"],
3  "overrides": [
4    {
5      "files": ["test/**"],
6      "plugins": ["jest"],
7      "extends": ["plugin:jest/recommended"],
8      "rules": { "jest/prefer-expect-assertions": "off" }
9    }
10  ],
11  "rules": {
12    "indent": ["error", 2]
13  }
14}

For eslint.config.js you can use files and ignores:

1const jest = require('eslint-plugin-jest');
2
3module.exports = [
4  ...require('@eslint/js').configs.recommended,
5  {
6    files: ['test/**'],
7    ...jest.configs['flat/recommended'],
8    rules: {
9      ...jest.configs['flat/recommended'].rules,
10      'jest/prefer-expect-assertions': 'off',
11    },
12  },
13  // you can also configure jest rules in other objects, so long as some of the `files` match
14  {
15    files: ['test/**'],
16    rules: { 'jest/prefer-expect-assertions': 'off' },
17  },
18];

Jest `version` setting

The behaviour of some rules (specifically no-deprecated-functions) change depending on the version of Jest being used.

By default, this plugin will attempt to determine to locate Jest using require.resolve, meaning it will start looking in the closest node_modules folder to the file being linted and work its way up.

Since we cache the automatically determined version, if you're linting sub-folders that have different versions of Jest, you may find that the wrong version of Jest is considered when linting. You can work around this by providing the Jest version explicitly in nested ESLint configs:

1{
2  "settings": {
3    "jest": {
4      "version": 27
5    }
6  }
7}

To avoid hard-coding a number, you can also fetch it from the installed version of Jest if you use a JavaScript config file such as .eslintrc.js:

1module.exports = {
2  settings: {
3    jest: {
4      version: require('jest/package.json').version,
5    },
6  },
7};

Shareable configurations

[!NOTE]

eslint.config.js compatible versions of configs are available prefixed with flat/ and may be subject to small breaking changes while ESLint v9 is being finalized.

Style

This plugin also exports a configuration named style, which adds some stylistic rules, such as prefer-to-be-null, which enforces usage of toBeNull over toBe(null).

To enable this configuration use the extends property in your .eslintrc config file:

1{
2  "extends": ["plugin:jest/style"]
3}

To enable this configuration with eslint.config.js, use jest.configs['flat/style']:

1const jest = require('eslint-plugin-jest');
2
3module.exports = [
4  {
5    files: [
6      /* glob matching your test files */
7    ],
8    ...jest.configs['flat/style'],
9  },
10];

All

If you want to enable all rules instead of only some you can do so by adding the all configuration to your .eslintrc config file:

1{
2  "extends": ["plugin:jest/all"]
3}

To enable this configuration with eslint.config.js, use jest.configs['flat/all']:

1const jest = require('eslint-plugin-jest');
2
3module.exports = [
4  {
5    files: [
6      /* glob matching your test files */
7    ],
8    ...jest.configs['flat/all'],
9  },
10];

While the recommended and style configurations only change in major versions the all configuration may change in any release and is thus unsuited for installations requiring long-term consistency.

Rules

💼 Configurations enabled in.
⚠️ Configurations set to warn in.
✅ Set in the recommended configuration.
🎨 Set in the style configuration.
🔧 Automatically fixable by the --fix CLI option.
💡 Manually fixable by editor suggestions.

Name	Description	💼	⚠️	🔧	💡
consistent-test-it	Enforce `test` and `it` usage conventions			🔧
expect-expect	Enforce assertion to be made in a test body		✅
max-expects	Enforces a maximum number assertion calls in a test body
max-nested-describe	Enforces a maximum depth to nested describe calls
no-alias-methods	Disallow alias methods	✅	🎨	🔧
no-commented-out-tests	Disallow commented out tests		✅
no-conditional-expect	Disallow calling `expect` conditionally	✅
no-conditional-in-test	Disallow conditional logic in tests
no-confusing-set-timeout	Disallow confusing usages of jest.setTimeout
no-deprecated-functions	Disallow use of deprecated functions	✅		🔧
no-disabled-tests	Disallow disabled tests		✅
no-done-callback	Disallow using a callback in asynchronous tests and hooks	✅			💡
no-duplicate-hooks	Disallow duplicate setup and teardown hooks
no-export	Disallow using `exports` in files containing tests	✅
no-focused-tests	Disallow focused tests	✅			💡
no-hooks	Disallow setup and teardown hooks
no-identical-title	Disallow identical titles	✅
no-interpolation-in-snapshots	Disallow string interpolation inside snapshots	✅
no-jasmine-globals	Disallow Jasmine globals	✅		🔧
no-large-snapshots	Disallow large snapshots
no-mocks-import	Disallow manually importing from `__mocks__`	✅
no-restricted-jest-methods	Disallow specific `jest.` methods
no-restricted-matchers	Disallow specific matchers & modifiers
no-standalone-expect	Disallow using `expect` outside of `it` or `test` blocks	✅
no-test-prefixes	Require using `.only` and `.skip` over `f` and `x`	✅		🔧
no-test-return-statement	Disallow explicitly returning from tests
no-untyped-mock-factory	Disallow using `jest.mock()` factories without an explicit type parameter			🔧
padding-around-after-all-blocks	Enforce padding around `afterAll` blocks			🔧
padding-around-after-each-blocks	Enforce padding around `afterEach` blocks			🔧
padding-around-all	Enforce padding around Jest functions			🔧
padding-around-before-all-blocks	Enforce padding around `beforeAll` blocks			🔧
padding-around-before-each-blocks	Enforce padding around `beforeEach` blocks			🔧
padding-around-describe-blocks	Enforce padding around `describe` blocks			🔧
padding-around-expect-groups	Enforce padding around `expect` groups			🔧
padding-around-test-blocks	Enforce padding around afterAll blocks			🔧
prefer-called-with	Suggest using `toBeCalledWith()` or `toHaveBeenCalledWith()`
prefer-comparison-matcher	Suggest using the built-in comparison matchers			🔧
prefer-each	Prefer using `.each` rather than manual loops
prefer-equality-matcher	Suggest using the built-in equality matchers				💡
prefer-expect-assertions	Suggest using `expect.assertions()` OR `expect.hasAssertions()`				💡
prefer-expect-resolves	Prefer `await expect(...).resolves` over `expect(await ...)` syntax			🔧
prefer-hooks-in-order	Prefer having hooks in a consistent order
prefer-hooks-on-top	Suggest having hooks before any test cases
prefer-importing-jest-globals	Prefer importing Jest globals			🔧
prefer-jest-mocked	Prefer `jest.mocked()` over `fn as jest.Mock`			🔧
prefer-lowercase-title	Enforce lowercase test names			🔧
prefer-mock-promise-shorthand	Prefer mock resolved/rejected shorthands for promises			🔧
prefer-snapshot-hint	Prefer including a hint with external snapshots
prefer-spy-on	Suggest using `jest.spyOn()`			🔧
prefer-strict-equal	Suggest using `toStrictEqual()`				💡
prefer-to-be	Suggest using `toBe()` for primitive literals	🎨		🔧
prefer-to-contain	Suggest using `toContain()`	🎨		🔧
prefer-to-have-length	Suggest using `toHaveLength()`	🎨		🔧
prefer-todo	Suggest using `test.todo`			🔧
require-hook	Require setup and teardown code to be within a hook
require-to-throw-message	Require a message for `toThrow()`
require-top-level-describe	Require test cases and hooks to be inside a `describe` block
valid-describe-callback	Enforce valid `describe()` callback	✅
valid-expect	Enforce valid `expect()` usage	✅		🔧
valid-expect-in-promise	Require promises that have expectations in their chain to be valid	✅
valid-title	Enforce valid titles	✅		🔧

Requires Type Checking

Name	Description	💼	⚠️	🔧	💡
unbound-method	Enforce unbound methods are called with their expected scope

In order to use the rules powered by TypeScript type-checking, you must be using @typescript-eslint/parser & adjust your eslint config as outlined here.

Note that unlike the type-checking rules in @typescript-eslint/eslint-plugin, the rules here will fallback to doing nothing if type information is not available, meaning it's safe to include them in shared configs that could be used on JavaScript and TypeScript projects.

Also note that unbound-method depends on @typescript-eslint/eslint-plugin, as it extends the original unbound-method rule from that plugin.

Credit

Related Projects

eslint-plugin-jest-extended

This is a sister plugin to eslint-plugin-jest that provides support for the matchers provided by jest-extended.

https://github.com/jest-community/eslint-plugin-jest-extended

eslint-plugin-jest-formatting

This project aims to provide formatting rules (auto-fixable where possible) to ensure consistency and readability in jest test suites.

https://github.com/dangreenisrael/eslint-plugin-jest-formatting

eslint-plugin-istanbul

A set of rules to enforce good practices for Istanbul, one of the code coverage tools used by Jest.

https://github.com/istanbuljs/eslint-plugin-istanbul

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

Reason

dependency not pinned by hash detected -- score normalized to 0

Details

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0

Fuzzing

Determines if the project uses fuzzing.

0

SAST

Determines if the project uses static code analysis.

Score

4.8

/10

Last Scanned on 2024-11-18

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

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Installations

Score

Pull Requests

4

1,255

226

1,025

Issues

27

413

386

Releases

Developer

jest-community

Module System

CommonJS

Statistics

Bundle Size

5.38 kB

2.13 kB

Languages

Total Downloads

1,783,500,299

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

Peer Dependencies

Dev Dependencies

eslint-plugin-jest

Installation

Usage

Aliased Jest globals

Aliased @jest/globals

Running rules only on test-related files

Jest version setting

Shareable configurations

Recommended

Style

All

Rules

Requires Type Checking

Credit

Related Projects

eslint-plugin-jest-extended

eslint-plugin-jest-formatting

eslint-plugin-istanbul

10

10

10

10

9

1

0

0

0

0

0

0

4.8

/10

Other packages similar to eslint-plugin-jest

Aliased `@jest/globals`

Jest `version` setting