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37 lines
979 B
TypeScript
37 lines
979 B
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { test, assert } from "../testing/mod.ts";
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import { copyBytes } from "./util.ts";
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test(function testCopyBytes() {
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let dst = new Uint8Array(4);
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dst.fill(0);
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let src = Uint8Array.of(1, 2);
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let len = copyBytes(dst, src, 0);
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assert(len === 2);
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assert.equal(dst, Uint8Array.of(1, 2, 0, 0));
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dst.fill(0);
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src = Uint8Array.of(1, 2);
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len = copyBytes(dst, src, 1);
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assert(len === 2);
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assert.equal(dst, Uint8Array.of(0, 1, 2, 0));
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dst.fill(0);
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src = Uint8Array.of(1, 2, 3, 4, 5);
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len = copyBytes(dst, src);
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assert(len === 4);
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assert.equal(dst, Uint8Array.of(1, 2, 3, 4));
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dst.fill(0);
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src = Uint8Array.of(1, 2);
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len = copyBytes(dst, src, 100);
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assert(len === 0);
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assert.equal(dst, Uint8Array.of(0, 0, 0, 0));
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dst.fill(0);
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src = Uint8Array.of(3, 4);
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len = copyBytes(dst, src, -2);
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assert(len === 2);
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assert.equal(dst, Uint8Array.of(3, 4, 0, 0));
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});
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