valid-title.md

Enforce valid titles (vitest/valid-title)

💼 This rule is enabled in the ✅ recommended config.

⚠️ This rule warns in the 🌐 all config.

🔧 This rule is automatically fixable by the --fix CLI option.

Rule Details

This rule aims to enforce valid titles for describe, it and test titles.

Options

This rule has an object option:

{
  "vitest/valid-title": [
	"error",
   {
    "ignoreTypeOfDescribeName": false,
    "allowArguments": false,
    "disallowedWords": ["skip", "only"],
    "mustNotMatch": ["^\\s+$", "^\\s*\\d+\\s*$"],
    "mustMatch": ["^\\s*\\w+\\s*$"]
    }
  ]
}

ignoreTypeOfDescribeName

If true, the rule ignores the type of the first argument of describe function.

Examples of incorrect code for this rule with the { "ignoreTypeOfDescribeName": false } option:

describe(1, () => {
  it('should be a number', () => {
	expect(1).toBeNumber()
  })
})

Examples of correct code for this rule with the { "ignoreTypeOfDescribeName": false } option:

describe('1', () => {
  it('should be a number', () => {
	expect(1).toBeNumber()
  })
})

allowArguments

If true, the rule ignores the arguments of describe function.

Examples of correct code for this rule with the { "allowArguments": false } option:

describe('name', () => {})

Examples of correct code for this rule with the { "allowArguments": true } option:

describe(foo, () => {})

disallowedWords

An array of words that are not allowed in the test title.

Examples of incorrect code for this rule with the { "disallowedWords": ["skip", "only"] } option:

describe('foo', () => {
  it.skip('should be skipped', () => {
	expect(1).toBeNumber()
  })
})

Examples of correct code for this rule with the { "disallowedWords": ["skip", "only"] } option:

describe('foo', () => {
  it('should be skipped', () => {
	expect(1).toBeNumber()
  })
})

mustNotMatch

An array of regex strings that are not allowed in the test title.

Examples of incorrect code for this rule with the { "mustNotMatch": ["^\\s+$", "^\\s*\\d+\\s*$"] } option:

describe('foo', () => {
  it('  ', () => {
	expect(1).toBeNumber()
  })
})

Examples of correct code for this rule with the { "mustNotMatch": ["^\\s+$", "^\\s*\\d+\\s*$"] } option:

describe('foo', () => {
  it('should be a number', () => {
	expect(1).toBeNumber()
  })
})

mustMatch

An array of regex strings that are required in the test title.

If you specify an array of regex strings, the check is performed on describe, test and it titles.

For more granular control, you can specify an object with the following properties :

• describe: an array of regex strings that are required in the describe title.
• test: an array of regex strings that are required in the test title.
• it: an array of regex strings that are required in the it title.

Examples of incorrect code for this rule with the { "mustMatch": ["^\\s*\\w+\\s*$"] } option:

describe('foo', () => {
  it('  ', () => {
	expect(1).toBeNumber()
  })
})

Examples of correct code for this rule with the { "mustMatch": ["^\\s*\\w+\\s*$"] } option:

describe('foo', () => {
  it('should be a number', () => {
	expect(1).toBeNumber()
  })
})

Examples of incorrect code for this rule with the { "mustMatch": { "it": ["^should .+\.$"] } } option:

// The describe title is checked with the default regex, so it's valid
describe('foo', () => {
  // This check fails because the title does not match the regex
  it('Should be a number', () => {
    expect(1).toBeNumber()
  })
})

Examples of correct code for this rule with the { "mustMatch": { "describe": ["^\\s*\\w+\\s*$"] } } option:

// The describe title is checked with the default regex, so it's valid
describe('foo', () => {
  // This check succeeds because the title matches the regex
  it('should be a number.', () => {
    expect(1).toBeNumber()
  })
})

Note: If you'd like to use a function or class names inside describe, test or it blocks as a parameter, you must enable vitest's type checking.

To enable typechecking for vitest make sure settings key is added in your configuration

import vitest from "eslint-plugin-vitest";

export defualt [
 {
  files: ["tests/**"],
  plugins: {
     vitest
  },
  rules: {
   ...vitest.configs.recommended.rules
  },
  settings: {
      vitest: {
        typecheck: true
    }
   }
 }
]