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35 lines
1.4 KiB
TypeScript
35 lines
1.4 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import { equals } from "./equals.ts";
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import { assert } from "../assert/mod.ts";
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Deno.test("equals()", () => {
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const v = equals(new Uint8Array([0, 1, 2, 3]), new Uint8Array([0, 1, 2, 3]));
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const v2 = equals(new Uint8Array([0, 1, 2, 2]), new Uint8Array([0, 1, 2, 3]));
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const v3 = equals(new Uint8Array([0, 1, 2, 3]), new Uint8Array([0, 1, 2]));
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assert(v);
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assert(!v2);
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assert(!v3);
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});
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Deno.test("equals() handles randomized testing", () => {
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// run tests before and after cutoff
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for (let len = 995; len <= 1005; len++) {
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const arr1 = crypto.getRandomValues(new Uint8Array(len));
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const arr2 = crypto.getRandomValues(new Uint8Array(len));
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const arr3 = arr1.slice(0);
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// the chance of arr1 equaling arr2 is basically 0
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// but introduce an inequality at the end just in case
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arr2[arr2.length - 1] = arr1[arr1.length - 1] ^ 1;
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// arr3 is arr1 but with an inequality in the very last element
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// this is to test the equality check when length isn't a multiple of 4
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arr3[arr3.length - 1] ^= 1;
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// arrays with same underlying ArrayBuffer should be equal
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assert(equals(arr1, arr1));
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// equal arrays with different underlying ArrayBuffers should be equal
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assert(equals(arr1, arr1.slice(0)));
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// inequal arrays should be inequal
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assert(!equals(arr1, arr2));
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assert(!equals(arr1, arr3));
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}
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});
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