1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/xhr/overridemimetype-done-state.any.js b/testing/web-platform/tests/xhr/overridemimetype-done-state.any.js
new file mode 100644
index 0000000000..5e70492436
--- /dev/null
+++ b/testing/web-platform/tests/xhr/overridemimetype-done-state.any.js
@@ -0,0 +1,20 @@
+// META title= XMLHttpRequest: overrideMimeType() in DONE state</title>
+
+/**
+ * Spec: <https://xhr.spec.whatwg.org/#the-overridemimetype()-method>; data-tested-assertations="/following::ol/li[1]"
+ */
+var test = async_test();
+var client = new XMLHttpRequest();
+client.onreadystatechange = test.step_func( function() {
+  if (client.readyState !== 4) return;
+  var text = client.responseText;
+  assert_not_equals(text, "");
+  assert_throws_dom("InvalidStateError", function() { client.overrideMimeType('application/xml;charset=Shift-JIS'); });
+  if (GLOBAL.isWindow()) {
+    assert_equals(client.responseXML, null);
+  }
+  assert_equals(client.responseText, text);
+  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();