1 files changed, 73 insertions, 0 deletions
diff --git a/testing/web-platform/tests/uievents/legacy-domevents-tests/submissions/Microsoft/compositionstart.preventDefault.html b/testing/web-platform/tests/uievents/legacy-domevents-tests/submissions/Microsoft/compositionstart.preventDefault.html
new file mode 100644
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+++ b/testing/web-platform/tests/uievents/legacy-domevents-tests/submissions/Microsoft/compositionstart.preventDefault.html
@@ -0,0 +1,73 @@
+<!DOCTYPE HTML>
+<html>
+    <head>
+        <title id='desc'> Cancelling compositionstart Event via Event.preventDefault() </title>
+        <script type="text/javascript">
+            var PassTest = function()
+            {
+                document.getElementById("testresult").firstChild.data = "PASS";
+            }
+
+            var FailTest = function()
+            {
+                document.getElementById("testresult").firstChild.data = "FAIL";
+            }
+
+            var EVENT = "compositionstart";
+            var TARGET;
+
+            window.onload = function(e)
+            {
+                try
+                {
+                    TARGET = document.getElementById("target");
+                    TARGET.addEventListener(EVENT, TestEvent, true);
+                    TARGET.addEventListener("keyup", TestEvent, true);
+                }
+                catch(ex)
+                {
+                    FailTest();
+                }
+            }
+
+            function TestEvent(evt)
+            {
+                if (evt.type == EVENT)
+                {
+                    evt.preventDefault();
+                }
+
+                if (evt.type == "keyup")
+                {
+                    if (TARGET.value == "")
+                    {
+                        PassTest();
+                    }
+                    else
+                    {
+                        FailTest();
+                    }
+                }
+            }
+        </script>
+    </head>
+    <body>
+        <h3>DOM Events</h3>
+        <h4>
+            Test Description: The default action of compositionstart event is to launch the appropriate text
+            composition system. If this event is canceled, the text composition system must not be launched.
+        </h4>
+
+        <pre>
+            <input id="target" value=""/>
+
+            Steps:
+            1) Open Japanese Microsoft IME and select Hiragana input method
+            2) Click at the above textbox and then type 'a' using keyboard
+        </pre>
+
+        <p>Test passes if the word "PASS" appears below and nothing is typed to the textbox after following the above steps.</p>
+        <div>Test result: </div>
+        <div id='testresult'>FAIL</div>
+    </body>
+</html>
+\ No newline at end of file