1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webmessaging/Channel_postMessage_Blob.any.js b/testing/web-platform/tests/webmessaging/Channel_postMessage_Blob.any.js
new file mode 100644
index 0000000000..fce814f588
--- /dev/null
+++ b/testing/web-platform/tests/webmessaging/Channel_postMessage_Blob.any.js
@@ -0,0 +1,33 @@
+// META: title=postMessage() with a Blob
+// META: script=/common/gc.js
+
+    var TARGET = null;
+    var SOURCE = null;
+    var description = "Messages can contain Blobs.";
+
+    var t = async_test("Test Description: " + description);
+
+    var channel = new MessageChannel();
+    SOURCE = channel.port1;
+    TARGET = channel.port2;
+    TARGET.start();
+    TARGET.addEventListener("message", t.step_func(TestMessageEvent), true);
+
+    (function() {
+      SOURCE.postMessage({blob: new Blob(['foo', 'bar'])});
+    })();
+    garbageCollect();
+
+    function TestMessageEvent(evt)
+    {
+        assert_true('blob' in evt.data);
+        assert_true(evt.data.blob instanceof Blob);
+        assert_equals(evt.data.blob.size, 6);
+        const reader = new FileReader();
+        reader.onerror = t.unreached_func('Reading blob failed');
+        reader.onload = t.step_func(() => {
+            assert_equals(reader.result, 'foobar');
+            t.done();
+          });
+        reader.readAsText(evt.data.blob);
+    }