assertExists | /testing/asserts.ts | std@0.223.0

Module

std/testing/asserts.ts>assertExists

The Deno Standard Library

denoland/deno_std

assertNotStrictEquals

Spy

spy

Has

function assertExists

Deprecated

(will be removed after 1.0.0) Import from https://deno.land/std/assert/assert_exists.ts instead.

import { assertExists } from "https://deno.land/std@0.223.0/testing/asserts.ts";

Deprecated

(will be removed after 1.0.0) Import from https://deno.land/std/assert/assert_exists.ts instead.

assertExists<T>(actual: T, msg?: string): asserts actual is NonNullable<T>

Make an assertion that actual is not null or undefined. If not then throw.

Examples

Example 1

import { assertExists } from "https://deno.land/std@0.223.0/testing/asserts.ts";

assertExists("something"); // Doesn't throw
assertExists(undefined); // Throws

Type Parameters

Parameters

actual: T

optional

msg: string

Returns

asserts actual is NonNullable<T>