1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/XMLHttpRequest/overridemimetype-done-state.htm b/testing/web-platform/tests/XMLHttpRequest/overridemimetype-done-state.htm
new file mode 100644
index 000000000..a1711e609
--- /dev/null
+++ b/testing/web-platform/tests/XMLHttpRequest/overridemimetype-done-state.htm
@@ -0,0 +1,26 @@
+<!doctype html>
+<html>
+  <head>
+    <title>XMLHttpRequest: overrideMimeType() in DONE state</title>
+    <meta charset="utf-8">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <link rel="help" href="https://xhr.spec.whatwg.org/#the-overridemimetype()-method" data-tested-assertations="/following::ol/li[1]" />
+  </head>
+  <body>
+    <div id="log"></div>
+    <script>
+      var test = async_test();
+      var client = new XMLHttpRequest();
+      client.onreadystatechange = test.step_func( function() {
+        if (client.readyState !== 4) return;
+        assert_throws("InvalidStateError", function() { client.overrideMimeType('application/xml;charset=Shift-JIS'); });
+        assert_equals(client.responseXML, null);
+        test.done();
+      });
+      client.open("GET", "resources/status.py?type="+encodeURIComponent('text/plain;charset=iso-8859-1')+'&content=%3Cmsg%3E%83%65%83%58%83%67%3C%2Fmsg%3E');
+      client.send();
+    </script>
+
+  </body>
+</html>