deno/cli/tests/unit/response_test.ts

// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
import { assert, assertEquals, unitTest } from "./test_util.ts";

unitTest(async function responseText() {
  const response = new Response("hello world");
  const textPromise = response.text();
  assert(textPromise instanceof Promise);
  const text = await textPromise;
  assert(typeof text === "string");
  assertEquals(text, "hello world");
});

unitTest(async function responseArrayBuffer() {
  const response = new Response(new Uint8Array([1, 2, 3]));
  const arrayBufferPromise = response.arrayBuffer();
  assert(arrayBufferPromise instanceof Promise);
  const arrayBuffer = await arrayBufferPromise;
  assert(arrayBuffer instanceof ArrayBuffer);
  assertEquals(new Uint8Array(arrayBuffer), new Uint8Array([1, 2, 3]));
});

unitTest(async function responseJson() {
  const response = new Response('{"hello": "world"}');
  const jsonPromise = response.json();
  assert(jsonPromise instanceof Promise);
  const json = await jsonPromise;
  assert(json instanceof Object);
  assertEquals(json, { hello: "world" });
});

unitTest(async function responseBlob() {
  const response = new Response(new Uint8Array([1, 2, 3]));
  const blobPromise = response.blob();
  assert(blobPromise instanceof Promise);
  const blob = await blobPromise;
  assert(blob instanceof Blob);
  assertEquals(blob, new Blob([new Uint8Array([1, 2, 3])]));
});

unitTest(async function responseFormData() {
  const input = new FormData();
  input.append("hello", "world");
  const response = new Response(input, {
    headers: { "content-type": "application/x-www-form-urlencoded" },
  });
  const formDataPromise = response.formData();
  assert(formDataPromise instanceof Promise);
  const formData = await formDataPromise;
  assert(formData instanceof FormData);
  assertEquals(formData, input);
});