1 files changed, 92 insertions, 0 deletions
diff --git a/cli/tests/unit/blob_test.ts b/cli/tests/unit/blob_test.ts
new file mode 100644
index 000000000..70f8fb3d5
--- /dev/null
+++ b/cli/tests/unit/blob_test.ts
@@ -0,0 +1,92 @@
+// 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"]);
+  const str = "Test";
+  const b2 = new Blob([b1, str]);
+  assertEquals(b2.size, b1.size + str.length);
+});
+
+unitTest(function blobBuffer(): void {
+  const buffer = new ArrayBuffer(12);
+  const u8 = new Uint8Array(buffer);
+  const f1 = new Float32Array(buffer);
+  const b1 = new Blob([buffer, u8]);
+  assertEquals(b1.size, 2 * u8.length);
+  const b2 = new Blob([b1, f1]);
+  assertEquals(b2.size, 3 * u8.length);
+});
+
+unitTest(function blobSlice(): void {
+  const blob = new Blob(["Deno", "Foo"]);
+  const b1 = blob.slice(0, 3, "Text/HTML");
+  assert(b1 instanceof Blob);
+  assertEquals(b1.size, 3);
+  assertEquals(b1.type, "text/html");
+  const b2 = blob.slice(-1, 3);
+  assertEquals(b2.size, 0);
+  const b3 = blob.slice(100, 3);
+  assertEquals(b3.size, 0);
+  const b4 = blob.slice(0, 10);
+  assertEquals(b4.size, blob.size);
+});
+
+unitTest(function blobInvalidType(): void {
+  const blob = new Blob(["foo"], {
+    type: "\u0521",
+  });
+
+  assertEquals(blob.type, "");
+});
+
+unitTest(function blobShouldNotThrowError(): void {
+  let hasThrown = false;
+
+  try {
+    const options1: object = {
+      ending: "utf8",
+      hasOwnProperty: "hasOwnProperty",
+    };
+    const options2: object = Object.create(null);
+    new Blob(["Hello World"], options1);
+    new Blob(["Hello World"], options2);
+  } catch {
+    hasThrown = true;
+  }
+
+  assertEquals(hasThrown, false);
+});
+
+unitTest(function nativeEndLine(): void {
+  const options: object = {
+    ending: "native",
+  };
+  const blob = new Blob(["Hello\nWorld"], options);
+
+  assertEquals(blob.size, Deno.build.os === "windows" ? 12 : 11);
+});
+
+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");
+});