1 files changed, 32 insertions, 0 deletions
diff --git a/testing/web-platform/tests/xhr/open-method-responsetype-set-sync.htm b/testing/web-platform/tests/xhr/open-method-responsetype-set-sync.htm
new file mode 100644
index 0000000000..7858c91409
--- /dev/null
+++ b/testing/web-platform/tests/xhr/open-method-responsetype-set-sync.htm
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>XMLHttpRequest: open() sync request not allowed if responseType is set</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <link rel="help" href="https://xhr.spec.whatwg.org/#the-open()-method" data-tested-assertations="following::ol[1]/li[10]" />
+
+  </head>
+  <body>
+    <div id="log"></div>
+    <script>
+      // Note: the case of calling synchronous open() first, and then setting
+      // responseType, is tested in responsetype.html.
+      function request(type) {
+        test(function() {
+          var client = new XMLHttpRequest()
+          client.onreadystatechange = this.step_func(function(){
+            assert_unreached('No events should fire here')
+          })
+          client.responseType = type
+          assert_throws_dom("InvalidAccessError", function() { client.open('GET', "...", false) })
+        }, document.title + " (" + type + ")")
+      }
+      request("arraybuffer")
+      request("blob")
+      request("json")
+      request("text")
+      request("document")
+    </script>
+  </body>
+</html>