assert | /testing/asserts.ts | std@0.209.0

Module

std/testing/asserts.ts>assert

Deno standard library

denoland/deno_std

assertNotStrictEquals

Spy

spy

Has

The Standard Library has been moved to JSR. See the blog post for details.

function assert

Re-export

import { assert } from "https://deno.land/std@0.209.0/testing/asserts.ts";

assert(expr: unknown, msg?): asserts expr

Make an assertion, error will be thrown if expr does not have truthy value.

Examples

Example 1

import { assert } from "https://deno.land/std@0.209.0/assert/assert.ts";

assert("hello".includes("ello")); // Doesn't throw
assert("hello".includes("world")); // Throws

Parameters

expr: unknown

optional

msg = [UNSUPPORTED]

Returns

asserts expr