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eslint-plugin-vitest

Eslint plugin for vitest

Installation

You'll first need to install ESLint:

npm i eslint --save-dev

Next, install eslint-plugin-vitest:

npm install eslint-plugin-vitest --save-dev

Usage

Make sure you're running eslint v9.0.0 or higher for the latest version of this plugin to work. The following example is how your eslint.config.js should be setup for this plugin to work for you.

import vitest from "eslint-plugin-vitest";

export default [
  {
    files: ["tests/**"], // or any other pattern
    plugins: {
      vitest
    },
    rules: {
      ...vitest.configs.recommended.rules, // you can also use vitest.configs.all.rules to enable all rules
      "vitest/max-nested-describe": ["error", { "max": 3 }] // you can also modify rules' behavior using option like this
    }, 
  },
];

If you're not using the latest version of eslint (version v8.57.0 or lower) you can setup this plugin using the following configuration

Add vitest to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

{
  "plugins": ["vitest"]
}

Then configure the rules you want to use under the rules section.

{
  "rules": {
    "vitest/max-nested-describe": [
      "error",
      {
        "max": 3
      }
    ]
  }
}

Enabling with type-testing

Vitest ships with an optional type-testing feature, which is disabled by default.

If you're using this feature, you should also enabled typecheck in the settings for this plugin. This ensures that rules like expect-expect account for type-related assertions in tests.

import vitest from "eslint-plugin-vitest";

export default [
  {
    files: ["tests/**"], // or any other pattern
    plugins: {
      vitest,
    },
    rules: {
      ...vitest.configs.recommended.rules,
    },
   settings: {
      vitest: {
        typecheck: true
      }
    },
    languageOptions: {
      globals: {
        ...vitest.environments.env.globals,
      },
    },
  },
]

Rules

<!-- begin auto-generated rules list -->

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

Name	Description	💼	⚠️	🔧	💡	❌
consistent-test-filename	require .spec test file pattern		🌐
consistent-test-it	enforce using test or it but not both		🌐	🔧
expect-expect	enforce having expectation in test body	✅
max-expects	enforce a maximum number of expect per test		🌐
max-nested-describe	require describe block to be less than set max value or default value		🌐
no-alias-methods	disallow alias methods		🌐	🔧
no-commented-out-tests	disallow commented out tests	✅
no-conditional-expect	disallow conditional expects		🌐
no-conditional-in-test	disallow conditional tests		🌐
no-conditional-tests	disallow conditional tests		🌐
no-disabled-tests	disallow disabled tests		🌐
no-done-callback	disallow using a callback in asynchronous tests and hooks		🌐		💡	❌
…