1 files changed, 27 insertions, 0 deletions
diff --git a/testing/web-platform/tests/XMLHttpRequest/open-url-encoding.htm b/testing/web-platform/tests/XMLHttpRequest/open-url-encoding.htm
new file mode 100644
index 000000000..7acdac86a
--- /dev/null
+++ b/testing/web-platform/tests/XMLHttpRequest/open-url-encoding.htm
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset=windows-1252>
+    <title>XMLHttpRequest: open() - URL encoding</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/li[7] following::ol/li[14]/ul/li[2]" />
+  </head>
+  <body>
+    <div id="log"></div>
+    <script>
+      test(function() {
+        var client = new XMLHttpRequest()
+        client.open("GET", "resources/content.py?\u00DF", false) // This is the German "eszett" character
+        client.send()
+        assert_equals(client.getResponseHeader("x-request-query"), "%C3%9F")
+      }, "percent encode characters");
+      test(function() {
+        var client = new XMLHttpRequest()
+        client.open("GET", "resources/content.py?\uD83D", false)
+        client.send()
+        assert_equals(client.getResponseHeader("x-request-query"), "%EF%BF%BD")
+      }, "lone surrogate should return U+FFFD");
+    </script>
+  </body>
+</html>