std/expect/_to_be_instance_of_test.ts
2024-04-29 11:57:30 +09:00

23 lines
656 B
TypeScript

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { expect } from "./expect.ts";
import { AssertionError, assertThrows } from "@std/assert";
Deno.test("expect().toBeInstanceOf()", () => {
expect(new Error()).toBeInstanceOf(Error);
expect(new Error()).toBeInstanceOf(Object);
expect(new Error()).not.toBeInstanceOf(String);
assertThrows(() => {
expect(new Error()).toBeInstanceOf(String);
}, AssertionError);
assertThrows(() => {
expect(new Error()).not.toBeInstanceOf(Error);
}, AssertionError);
assertThrows(() => {
expect(new Error()).not.toBeInstanceOf(Object);
}, AssertionError);
});