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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.import { assert, assertEquals } from "../assert/mod.ts";import { concat } from "./concat.ts";
Deno.test("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("concat() handles 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("concat() handles multiple Uint8Array", () => {  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);});
Deno.test("concat() handles an array of Uint8Array", () => {  const a = [    new Uint8Array([0, 1, 2, 3]),    new Uint8Array([4, 5, 6]),    new Uint8Array([7, 8, 9]),  ];  const joined = concat(a);  const expected = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);  assertEquals(joined, expected);});