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28 lines
807 B
TypeScript
28 lines
807 B
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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import { AssertionError } from "./assertion_error.ts";
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/**
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* Make an assertion that actual includes expected. If not
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* then throw.
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*
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* @example
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* ```ts
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* import { assertStringIncludes } from "https://deno.land/std@$STD_VERSION/assert/assert_string_includes.ts";
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*
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* assertStringIncludes("Hello", "ello"); // Doesn't throw
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* assertStringIncludes("Hello", "world"); // Throws
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* ```
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*/
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export function assertStringIncludes(
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actual: string,
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expected: string,
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msg?: string,
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) {
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if (!actual.includes(expected)) {
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const msgSuffix = msg ? `: ${msg}` : ".";
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msg = `Expected actual: "${actual}" to contain: "${expected}"${msgSuffix}`;
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throw new AssertionError(msg);
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}
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}
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