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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { assert, assertEquals } from "../testing/asserts.ts";import { concat } from "./concat.ts";
Deno.test("[bytes] concat", () => {  const encoder = new TextEncoder();  const u1 = encoder.encode("Hello ");  const u2 = encoder.encode("World");  const joined = concat(u1, u2);  assertEquals(new TextDecoder().decode(joined), "Hello World");  assert(u1 !== joined);  assert(u2 !== joined);});
Deno.test("[bytes] concat empty arrays", () => {  const u1 = new Uint8Array();  const u2 = new Uint8Array();  const joined = concat(u1, u2);  assertEquals(joined.byteLength, 0);  assert(u1 !== joined);  assert(u2 !== joined);});
Deno.test("[bytes] concat multiple arrays", () => {  const encoder = new TextEncoder();  const u1 = encoder.encode("Hello ");  const u2 = encoder.encode("W");  const u3 = encoder.encode("o");  const u4 = encoder.encode("r");  const u5 = encoder.encode("l");  const u6 = encoder.encode("d");  const joined = concat(u1, u2, u3, u4, u5, u6);  assertEquals(new TextDecoder().decode(joined), "Hello World");  assert(u1 !== joined);  assert(u2 !== joined);});