1 files changed, 19 insertions, 0 deletions
diff --git a/testing/web-platform/tests/xhr/event-loadstart-upload.any.js b/testing/web-platform/tests/xhr/event-loadstart-upload.any.js
new file mode 100644
index 0000000000..3918adb66a
--- /dev/null
+++ b/testing/web-platform/tests/xhr/event-loadstart-upload.any.js
@@ -0,0 +1,19 @@
+// META: title=XMLHttpRequest: The send() method: Fire a progress event named loadstart on upload object (synchronous flag is unset)
+
+var test = async_test();
+test.step(function () {
+  var client = new XMLHttpRequest();
+  client.upload.onloadstart = test.step_func(function (e) {
+    assert_true(e instanceof ProgressEvent);
+    assert_equals(e.total, 7, 'upload.onloadstart: event.total');
+    assert_equals(e.loaded, 0, 'upload.onloadstart: event.loaded');
+    assert_equals(e.type, "loadstart");
+    test.done();
+  });
+  client.onreadystatechange = test.step_func(function () {
+    if (client.readyState === 4)
+      assert_unreached("onloadstart not called.");
+  });
+  client.open("POST", "resources/trickle.py?ms=5&count=8");
+  client.send('foo=bar');
+});