@halvaradop/ts-utility-types/test

Utilities for type-level testing and assertions in TypeScript. These types help compare, validate, and ensure type conditions in testing or advanced development scenarios.

import type { Equals, Expect, Not } from "@halvaradop/ts-utility-types/test"

Table of Contents

• Equals
• Expect
• Not

Equals<X, Y>

Checks if two types are strictly equal.

// Expected: true
type CheckTrue = Equals<true, true>

// Expected: false
type CheckFalse = Equals<() => {}, true>

Expect<T extends true>

Ensures the received type is true. Useful for type-level tests.

// Expected: true
type CheckTrue = Expect<true>

// Expected: false (type error)
type CheckFalse = Expect<false>

Not<T extends boolean>

Negates a boolean type value.

// Expected: false
type CheckFalse = Not<true>

// Expected: true
type CheckTrue = Not<false>