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+<!doctype html>
+<html>
+  <head>
+    <title>Synthetic drag events</title>
+    <script type="text/javascript" src="/resources/testharness.js"></script>
+    <script type="text/javascript" src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <div id="log"></div>
+    <script type="text/javascript">
+test(function() {
+  assert_own_property(window,'DragEvent');
+}, 'window.DragEvent should be exposed' );
+test(function() {
+  var evt = new DragEvent('dragstart');
+  assert_false( !!evt.initDragEvent, 'initDragEvent' );
+  assert_true( !!evt.initMouseEvent, 'initMouseEvent' );
+  assert_true( !!evt.initUIEvent, 'initUIEvent' );
+  assert_true( !!evt.initEvent, 'initEvent' );
+}, 'DragEvent should have all of the inherited init*Event methods' );
+
+//cannot test non-synthetic dataTransfer objects as the param here because that needs a real DragEvent to create a proper one with global storage
+//will be tested in another file
+test(function() {
+  var evt = new DragEvent('dragstart');
+  evt.initMouseEvent('dragstart', true, true, window, 1, 0, 0, 0, 0, false, false, false, false, 1, document.body);
+}, 'initMouseEvent should not throw' );
+test(function() {
+  var evt = new DragEvent('dragstart');
+  evt.initUIEvent('dragstart', true, true, window, 1);
+}, 'initUIEvent should not throw' );
+test(function() {
+  var evt = new DragEvent('dragstart');
+  evt.initEvent('dragstart', true, true);
+}, 'initEvent should not throw' );
+
+test(function() {
+  var evt = new DragEvent('dragstart', {dataTransfer:null}), div = document.createElement('div'), ranlistener = false;
+  div.ondragstart = function () { ranlistener = true; };
+  div.dispatchEvent(evt);
+  assert_true(ranlistener);
+}, 'DragEvent constructor with null as the dataTransfer parameter should be able to fire the event' );
+test(function() {
+  var evt = new DragEvent('dragstart', {dataTransfer:undefined}), div = document.createElement('div'), ranlistener = false;
+  div.ondragstart = function () { ranlistener = true; };
+  div.dispatchEvent(evt);
+  assert_true(ranlistener);
+}, 'DragEvent constructor with undefined as the dataTransfer parameter should be able to fire the event' );
+test(function() {
+  assert_throws_js(TypeError, function() {
+    var evt = new DragEvent('dragstart', {dataTransfer:{}});
+  });
+}, 'DragEvent constructor with custom object as the dataTransfer parameter should throw TypeError' );
+test(function() {
+  var evt = new DragEvent('dragstart'), div = document.createElement('div'), ranlistener = false;
+  div.ondragstart = function () { ranlistener = true; };
+  evt.initMouseEvent('dragstart', true, true, window, 1, 0, 0, 0, 0, false, false, false, false, 1, document.body);
+  div.dispatchEvent(evt);
+  assert_true(ranlistener);
+}, 'initMouseEvent should be able to fire the event' );
+test(function() {
+  var evt = new DragEvent('dragstart'), div = document.createElement('div'), ranlistener = false;
+  div.ondragstart = function () { ranlistener = true; };
+  evt.initUIEvent('dragstart', true, true, window, 1);
+  div.dispatchEvent(evt);
+  assert_true(ranlistener);
+}, 'initUIEvent should be able to fire the event' );
+test(function() {
+  var evt = new DragEvent('dragstart'), div = document.createElement('div'), ranlistener = false;
+  div.ondragstart = function () { ranlistener = true; };
+  evt.initEvent('dragstart', true, true);
+  div.dispatchEvent(evt);
+  assert_true(ranlistener);
+}, 'initEvent should be able to fire the event' );
+
+test(function() {
+  var evt = new DragEvent('dragstart', {dataTransfer:null}), div = document.createElement('div'), dTrans = 'fail';
+  div.ondragstart = function (e) { dTrans = e.dataTransfer };
+  div.dispatchEvent(evt);
+  assert_equals(dTrans,null);
+}, 'DragEvent constructor with null as the dataTransfer parameter should give null as the dataTransfer' );
+test(function() {
+  var evt = new DragEvent('dragstart', {dataTransfer:undefined}), div = document.createElement('div'), dTrans = 'fail';
+  div.ondragstart = function (e) { dTrans = e.dataTransfer };
+  div.dispatchEvent(evt);
+  assert_equals(dTrans,null);
+}, 'DragEvent constructor with undefined as the dataTransfer parameter should give null as the dataTransfer' );
+test(function() {
+  var evt = new DragEvent('dragstart'), div = document.createElement('div'), dTrans = 'fail';
+  div.ondragstart = function (e) { dTrans = e.dataTransfer };
+  evt.initMouseEvent('dragstart', true, true, window, 1, 0, 0, 0, 0, false, false, false, false, 1, document.body);
+  div.dispatchEvent(evt);
+  assert_equals(dTrans,null);
+}, 'initMouseEvent should give null as the dataTransfer' );
+test(function() {
+  var evt = new DragEvent('dragstart'), div = document.createElement('div'), dTrans = 'fail';
+  div.ondragstart = function (e) { dTrans = e.dataTransfer };
+  evt.initUIEvent('dragstart', true, true, window, 1);
+  div.dispatchEvent(evt);
+  assert_equals(dTrans,null);
+}, 'initUIEvent should give null as the dataTransfer' );
+test(function() {
+  var evt = new DragEvent('dragstart'), div = document.createElement('div'), dTrans = 'fail';
+  div.ondragstart = function (e) { dTrans = e.dataTransfer };
+  evt.initEvent('dragstart', true, true);
+  div.dispatchEvent(evt);
+  assert_equals(dTrans,null);
+}, 'initEvent should give null as the dataTransfer' );
+
+//cannot test that synthetic event does not use the same data store as non-synthetic event because that needs a real DragEvent to create a proper one with global storage
+//will be tested in another file
+    </script>
+    <noscript><p>Enable JavaScript and reload</p></noscript>
+  </body>
+</html>