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Module

std/testing/asserts.ts>assertInstanceOf

The Deno Standard Library
denoland/deno_std
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function assertInstanceOf
Deprecated
Deprecated

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

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

Make an assertion that obj is an instance of type. If not then throw.

Examples

Example 1

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

assertInstanceOf(new Date(), Date); // Doesn't throw
assertInstanceOf(new Date(), Number); // Throws

Parameters

actual: unknown
expectedType: T
optional
msg = [UNSUPPORTED]

Returns

asserts actual is GetConstructorType<T>