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std/expect/_to_contain_test.ts

Deno standard library
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { expect } from "./expect.ts";import { AssertionError, assertThrows } from "../assert/mod.ts";
Deno.test("expect().toContain()", () => {  const arr = [1, 2, 3];
  expect(arr).toContain(2);  expect("foobarbaz").toContain("bar");
  expect(arr).not.toContain(4);  expect("foobarbaz").not.toContain("qux");
  assertThrows(() => {    expect(arr).toContain(4);  }, AssertionError);  assertThrows(() => {    expect("foobarbaz").toContain("qux");  }, AssertionError);
  assertThrows(() => {    expect(arr).not.toContain(2);  }, AssertionError);  assertThrows(() => {    expect("foobarbaz").not.toContain("bar");  }, AssertionError);});