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std/assert/assert_string_includes.ts

Deno standard library
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import { AssertionError } from "./assertion_error.ts";
/** * Make an assertion that actual includes expected. If not * then throw. */export function assertStringIncludes(  actual: string,  expected: string,  msg?: string,) {  if (!actual.includes(expected)) {    const msgSuffix = msg ? `: ${msg}` : ".";    msg = `Expected actual: "${actual}" to contain: "${expected}"${msgSuffix}`;    throw new AssertionError(msg);  }}