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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { assertEquals, assertThrows } from "../testing/asserts.ts";import { ByteSliceStream } from "./byte_slice_stream.ts";
Deno.test("[streams] ByteSliceStream", async function () {  function createStream(start = 0, end = Infinity) {    return new ReadableStream({      start(controller) {        controller.enqueue(new Uint8Array([0, 1]));        controller.enqueue(new Uint8Array([2, 3]));        controller.close();      },    }).pipeThrough(new ByteSliceStream(start, end));  }
  let chunks = [];
  for await (const chunk of createStream(0, 3)) {    chunks.push(chunk);  }  assertEquals(chunks, [    new Uint8Array([0, 1]),    new Uint8Array([2, 3]),  ]);
  chunks = [];  for await (const chunk of createStream(0, 1)) {    chunks.push(chunk);  }  assertEquals(chunks, [    new Uint8Array([0, 1]),  ]);
  chunks = [];  for await (const chunk of createStream(0, 2)) {    chunks.push(chunk);  }  assertEquals(chunks, [    new Uint8Array([0, 1]),    new Uint8Array([2]),  ]);
  chunks = [];  for await (const chunk of createStream(0, 3)) {    chunks.push(chunk);  }  assertEquals(chunks, [    new Uint8Array([0, 1]),    new Uint8Array([2, 3]),  ]);
  chunks = [];  for await (const chunk of createStream(1, 3)) {    chunks.push(chunk);  }  assertEquals(chunks, [    new Uint8Array([1]),    new Uint8Array([2, 3]),  ]);
  chunks = [];  for await (const chunk of createStream(2, 3)) {    chunks.push(chunk);  }  assertEquals(chunks, [    new Uint8Array([2, 3]),  ]);
  chunks = [];  for await (const chunk of createStream(0, 10)) {    chunks.push(chunk);  }  assertEquals(chunks, [    new Uint8Array([0, 1]),    new Uint8Array([2, 3]),  ]);
  assertThrows(() => createStream(-1, Infinity));});