1 files changed, 18 insertions, 0 deletions
diff --git a/testing/web-platform/tests/XMLHttpRequest/setrequestheader-before-open.htm b/testing/web-platform/tests/XMLHttpRequest/setrequestheader-before-open.htm
new file mode 100644
index 000000000..d90b02eaf
--- /dev/null
+++ b/testing/web-platform/tests/XMLHttpRequest/setrequestheader-before-open.htm
@@ -0,0 +1,18 @@
+<!doctype html>
+<html>
+  <head>
+    <title>XMLHttpRequest: setRequestHeader() before open()</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <link rel="help" href="https://xhr.spec.whatwg.org/#the-setrequestheader()-method" data-tested-assertations="following::ol/li[1]" />  
+  </head>
+  <body>
+    <div id="log"></div>
+    <script>
+      test(function() {
+        var client = new XMLHttpRequest()
+        assert_throws("InvalidStateError", function() { client.setRequestHeader("x-test", "test") })
+        }, 'setRequestHeader invoked before open()')
+    </script>
+  </body>
+</html>