std/cbor/text_encoder_stream_test.ts

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

import { assertEquals } from "@std/assert";
import { concat } from "@std/bytes";
import { random } from "./_common_test.ts";
import { encodeCbor } from "./encode_cbor.ts";
import { CborTextEncoderStream } from "./text_encoder_stream.ts";

Deno.test("CborTextEncoderStream() correctly encoding", async () => {
  const strings = [
    "a".repeat(random(0, 24)),
    "a".repeat(random(24, 2 ** 8)),
    "a".repeat(random(2 ** 8, 2 ** 16)),
    "a".repeat(random(2 ** 16, 2 ** 17)),
  ];

  const expectedOutput = concat([
    new Uint8Array([0b011_11111]),
    ...strings.map((x) => encodeCbor(x)),
    new Uint8Array([0b111_11111]),
  ]);

  const actualOutput = concat(
    await Array.fromAsync(
      ReadableStream.from(strings).pipeThrough(new CborTextEncoderStream()),
    ),
  );

  assertEquals(actualOutput, expectedOutput);
});

Deno.test("CborTextEncoderStream.from() correctly encoding", async () => {
  const strings = [
    "a".repeat(random(0, 24)),
    "a".repeat(random(24, 2 ** 8)),
    "a".repeat(random(2 ** 8, 2 ** 16)),
    "a".repeat(random(2 ** 16, 2 ** 17)),
  ];

  const expectedOutput = concat([
    new Uint8Array([0b011_11111]),
    ...strings.map((x) => encodeCbor(x)),
    new Uint8Array([0b111_11111]),
  ]);

  const actualOutput = concat(
    await Array.fromAsync(
      CborTextEncoderStream.from(strings).readable,
    ),
  );

  assertEquals(actualOutput, expectedOutput);
});