std/streams/to_text_test.ts

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.

import { assertEquals } from "@std/assert";
import { toText } from "./to_text.ts";

Deno.test("toText()", async () => {
  const byteStream = ReadableStream.from(["hello", " js ", "fans"])
    .pipeThrough(new TextEncoderStream());

  assertEquals(await toText(byteStream), "hello js fans");

  const stringStream = ReadableStream.from(["hello", " deno ", "world"]);

  assertEquals(await toText(stringStream), "hello deno world");

  const utf8ByteStream = new ReadableStream({
    start(controller) {
      controller.enqueue(new Uint8Array([228, 184, 173, 230, 150]));
      controller.enqueue(new Uint8Array([135]));
      controller.close();
    },
  });

  assertEquals(await toText(utf8ByteStream), "中文");
});