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std/expect/_to_be_undefined_test.ts

Deno standard library
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { expect } from "./expect.ts";import { AssertionError, assertThrows } from "../assert/mod.ts";
Deno.test("expect().toBeUndefined()", () => {  expect(undefined).toBeUndefined();
  expect(null).not.toBeUndefined();
  assertThrows(() => {    expect(null).toBeUndefined();  }, AssertionError);
  assertThrows(() => {    expect(undefined).not.toBeUndefined();  }, AssertionError);});