feat: Expose ReadableStream and make Blob more standardized (#4581)

Co-authored-by: crowlkats <crowlkats@gmail.com>

1 files changed, 23 insertions, 1 deletions

diff --git a/cli/js/tests/blob_test.ts b/cli/js/tests/blob_test.ts
index b60877dd0..af84c37a3 100644
--- a/cli/js/tests/blob_test.ts
+++ b/cli/js/tests/blob_test.ts
@@ -1,5 +1,7 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 import { unitTest, assert, assertEquals } from "./test_util.ts";
+import { concat } from "../../../std/bytes/mod.ts";
+import { decode } from "../../../std/encoding/utf8.ts";
 
 unitTest(function blobString(): void {
   const b1 = new Blob(["Hello World"]);
@@ -67,4 +69,24 @@ unitTest(function nativeEndLine(): void {
   assertEquals(blob.size, Deno.build.os === "win" ? 12 : 11);
 });
 
-// TODO(qti3e) Test the stored data in a Blob after implementing FileReader API.
+unitTest(async function blobText(): Promise<void> {
+  const blob = new Blob(["Hello World"]);
+  assertEquals(await blob.text(), "Hello World");
+});
+
+unitTest(async function blobStream(): Promise<void> {
+  const blob = new Blob(["Hello World"]);
+  const stream = blob.stream();
+  assert(stream instanceof ReadableStream);
+  const reader = stream.getReader();
+  let bytes = new Uint8Array();
+  const read = async (): Promise<void> => {
+    const { done, value } = await reader.read();
+    if (!done && value) {
+      bytes = concat(bytes, value);
+      return read();
+    }
+  };
+  await read();
+  assertEquals(decode(bytes), "Hello World");
+});