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📄 prefer-nullish-coalescing.test.ts

📊 Analysis Summary

Metric	Count
🔧 Functions	2
📦 Imports	8
📊 Variables & Constants	4

📚 Table of Contents

• Imports
• Variables & Constants
• Functions

🛠️ File Location:

📂 packages/eslint-plugin/tests/rules/prefer-nullish-coalescing.test.ts

📦 Imports

Name	Source
InvalidTestCase	@typescript-eslint/rule-tester
ValidTestCase	@typescript-eslint/rule-tester
noFormat	@typescript-eslint/rule-tester
RuleTester	@typescript-eslint/rule-tester
MessageIds	../../src/rules/prefer-nullish-coalescing
Options	../../src/rules/prefer-nullish-coalescing
rule	../../src/rules/prefer-nullish-coalescing
getFixturesRootDir	../RuleTester

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Variables & Constants

Name	Type	Kind	Value	Exported
ruleTester	any	const	`new RuleTester({
languageOptions: {
parserOptions: {
project: './tsconfig.json',
tsconfigRootDir: rootPath,
},
},
})`	✗
types	string[]	const	['string', 'number', 'boolean', 'object']	✗
nullishTypes	string[]	const	['null', 'undefined', 'null | undefined']	✗
ignorablePrimitiveTypes	string[]	const	['string', 'number', 'boolean', 'bigint']	✗

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Functions

typeValidTest(cb: (type: string, equals: '' | '=') => string | ValidTestCase<Options>): (string | ValidTestCase<Options>)[]

Code

function typeValidTest(
  cb: (type: string, equals: '' | '=') => string | ValidTestCase<Options>,
): (string | ValidTestCase<Options>)[] {
  return [
    ...types.map(type => cb(type, '')),
    ...types.map(type => cb(type, '=')),
  ];
}

• Parameters:
• cb: (type: string, equals: '' | '=') => string | ValidTestCase<Options>
• Return Type: (string | ValidTestCase<Options>)[]
• Calls:
• types.map
• cb

nullishTypeTest(cb: (nullish: string, type: string, equals: string) => T): T[]

Code

<
  T extends
    | string
    | InvalidTestCase<MessageIds, Options>
    | ValidTestCase<Options>,
>(
  cb: (nullish: string, type: string, equals: string) => T,
): T[] =>
  nullishTypes.flatMap(nullish =>
    types.flatMap(type =>
      ['', ...(cb.length === 3 ? ['='] : [])].map(equals =>
        cb(nullish, type, equals),
      ),
    ),
  )

• Parameters:
• cb: (nullish: string, type: string, equals: string) => T
• Return Type: T[]
• Calls:
• nullishTypes.flatMap

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