1 files changed, 35 insertions, 0 deletions
diff --git a/js/blob_test.ts b/js/blob_test.ts
new file mode 100644
index 000000000..293d475dd
--- /dev/null
+++ b/js/blob_test.ts
@@ -0,0 +1,35 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import { test, assert, assertEqual } from "./test_util.ts";
+
+test(async function blobString() {
+  const b1 = new Blob(["Hello World"]);
+  const str = "Test";
+  const b2 = new Blob([b1, str]);
+  assertEqual(b2.size, b1.size + str.length);
+});
+
+test(async function blobBuffer() {
+  const buffer = new ArrayBuffer(12);
+  const u8 = new Uint8Array(buffer);
+  const f1 = new Float32Array(buffer);
+  const b1 = new Blob([buffer, u8]);
+  assertEqual(b1.size, 2 * u8.length);
+  const b2 = new Blob([b1, f1]);
+  assertEqual(b2.size, 3 * u8.length);
+});
+
+test(async function blobSlice() {
+  const blob = new Blob(["Deno", "Foo"]);
+  const b1 = blob.slice(0, 3, "Text/HTML");
+  assert(b1 instanceof Blob);
+  assertEqual(b1.size, 3);
+  assertEqual(b1.type, "text/html");
+  const b2 = blob.slice(-1, 3);
+  assertEqual(b2.size, 0);
+  const b3 = blob.slice(100, 3);
+  assertEqual(b3.size, 0);
+  const b4 = blob.slice(0, 10);
+  assertEqual(b4.size, blob.size);
+});
+
+// TODO(qti3e) Test the stored data in a Blob after implementing FileReader API.