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31 lines
842 B
TypeScript
31 lines
842 B
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import { format } from "./_format.ts";
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import { AssertionError } from "./assertion_error.ts";
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/**
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* Make an assertion that `actual` is less than or equal to `expected`.
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* If not then throw.
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*
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* @example
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* ```ts
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* import { assertLessOrEqual } from "https://deno.land/std@$STD_VERSION/assert/assert_less_or_equal.ts";
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*
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* assertLessOrEqual(1, 2); // Doesn't throw
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* assertLessOrEqual(1, 1); // Doesn't throw
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* assertLessOrEqual(1, 0); // Throws
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* ```
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*/
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export function assertLessOrEqual<T>(
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actual: T,
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expected: T,
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msg?: string,
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): void {
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if (actual <= expected) return;
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const actualString = format(actual);
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const expectedString = format(expected);
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throw new AssertionError(
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msg ?? `Expect ${actualString} <= ${expectedString}`,
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);
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}
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