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@std/streams@0.203.0

denoland/std

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Published2 years ago (0.203.0)

Utilities for working with the Web Streams API

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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.

import { assertEquals } from "jsr:/@std/assert@^0.203.0/assert-equals";
import { toJson } from "./to_json.ts";

const textEncoder = new TextEncoder();

Deno.test("[streams] toJson", async () => {
  const byteStream = new ReadableStream<Uint8Array>({
    start(controller) {
      controller.enqueue(textEncoder.encode("["));
      controller.enqueue(textEncoder.encode("1, 2, 3, 4"));
      controller.enqueue(textEncoder.encode("]"));
      controller.close();
    },
  });

  assertEquals(await toJson(byteStream), [1, 2, 3, 4]);

  const stringStream = new ReadableStream<string>({
    start(controller) {
      controller.enqueue('{ "a": 2,');
      controller.enqueue(' "b": 3,');
      controller.enqueue(' "c": 4 }');
      controller.close();
    },
  });

  assertEquals(await toJson(stringStream), {
    a: 2,
    b: 3,
    c: 4,
  });
});