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

Module

std/testing/asserts.ts>assertFalse

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 assertFalse

Re-export

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

assertFalse(expr: unknown, msg?): asserts expr is Falsy

Make an assertion, error will be thrown if expr have truthy value.

Examples

Example 1

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

assertFalse(false); // Doesn't throw
assertFalse(true); // Throws

Parameters

expr: unknown

optional

msg = [UNSUPPORTED]

Returns

asserts expr is Falsy