yeet:assert

yeet:assert exports functions that each throw an AssertionError when a value is not what you expected.

import { assertEquals } from "yeet:assert";

yeet.test("adds", () => assertEquals(1 + 1, 2));

Importing

import { assert, assertEquals, assertStrictEquals, AssertionError } from "yeet:assert";

Export	Kind	Description
assert	function	Fails if a value is falsy
assertEquals	function	Fails unless two values are deeply equal
assertStrictEquals	function	Fails unless two values are the same value
AssertionError	class	What each assertion throws

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F assert

assert(expr: unknown, msg?: string): void

Throws an AssertionError with msg if expr is falsy.

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F assertEquals

assertEquals(actual: unknown, expected: unknown, msg?: string): void

Throws an AssertionError unless actual and expected are deeply equal. The message shows both values. Objects must have the same constructor and equal own enumerable properties. NaN equals NaN, dates compare by time, and a Map or Set ignores the order of its entries.

---

F assertStrictEquals

assertStrictEquals(actual: unknown, expected: unknown, msg?: string): void

Throws an AssertionError unless Object.is(actual, expected).

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O AssertionError

class AssertionError extends Error {
  name: "AssertionError";
}