1 files changed, 31 insertions, 0 deletions
diff --git a/testing/web-platform/tests/XMLHttpRequest/event-loadstart.htm b/testing/web-platform/tests/XMLHttpRequest/event-loadstart.htm
new file mode 100644
index 000000000..514900303
--- /dev/null
+++ b/testing/web-platform/tests/XMLHttpRequest/event-loadstart.htm
@@ -0,0 +1,31 @@
+<!doctype html>
+<html>
+  <head>
+    <title>XMLHttpRequest: loadstart event</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <link rel="help" href="https://xhr.spec.whatwg.org/#handler-xhr-onloadstart" data-tested-assertations="../.." />
+    <link rel="help" href="https://xhr.spec.whatwg.org/#event-xhr-loadstart" data-tested-assertations="../.." />
+    <link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following-sibling::ol/li[9]/ol/li[2]" />
+  </head>
+  <body>
+    <div id="log"></div>
+    <script>
+      var test = async_test();
+      test.step(function() {
+        var client = new XMLHttpRequest();
+        client.onloadstart = test.step_func(function(e) {
+          assert_true(e instanceof ProgressEvent);
+          assert_equals(e.type, "loadstart");
+          assert_equals(client.readyState, 1);
+          test.done();
+        });
+        setTimeout(test.step_func(function () {
+          assert_unreached("onloadstart not called after 500 ms");
+        }), 500);
+        client.open("GET", "resources/well-formed.xml");
+        client.send(null);
+      });
+    </script>
+  </body>
+</html>