Bookkeep the pointer event listeners added to page

third_party/WebKit/LayoutTests/fast/events/pointerevents/pointer-handler-count.html

Index: third_party/WebKit/LayoutTests/fast/events/pointerevents/pointer-handler-count.html
diff --git a/third_party/WebKit/LayoutTests/fast/events/pointerevents/pointer-handler-count.html b/third_party/WebKit/LayoutTests/fast/events/pointerevents/pointer-handler-count.html
new file mode 100644
index 0000000000000000000000000000000000000000..c22df7aecc209d7277519ad8adb55553bada8812
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/events/pointerevents/pointer-handler-count.html
@@ -0,0 +1,120 @@
+<script src='../../../resources/testharness.js'></script>
+<script src='../../../resources/testharnessreport.js'></script><script>
+
+(function() {
+    var listener = function() { }
+
+    test(function() {
+
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+        document.addEventListener('pointerenter', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        document.addEventListener('pointerout', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+        document.addEventListener('pointerenter', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 3);
+        document.addEventListener('pointerout', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 4);
+        document.removeEventListener('pointerenter', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 3);
+        document.removeEventListener('pointerout', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+
+        // Try removing the capturing listener again.
+        document.removeEventListener('pointerenter', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+        document.removeEventListener('pointerout', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+
+        document.removeEventListener('pointerenter', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        document.removeEventListener('pointerout', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+
+    }, "Test 1: addEventListener/removeEventListener on the document");
+
+})();
+
+(function() {
+    test(function() {
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+        document.onpointerenter = function() { }
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        document.onpointerenter = function() { }
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        document.onpointerenter = null;
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+    }, "Test 2: setting onpointerenter on the document");
+})();
+
+(function() {
+    var listener = function() { }
+
+    test(function() {
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+        window.addEventListener('pointerenter', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        window.addEventListener('pointerout', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+        window.addEventListener('pointerenter', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 3);
+        window.addEventListener('pointerout', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 4);
+        window.removeEventListener('pointerenter', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 3);
+        window.removeEventListener('pointerout', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+
+        // Try removing the capturing listener again.
+        window.removeEventListener('pointerenter', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+        window.removeEventListener('pointerout', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+
+        window.removeEventListener('pointerenter', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        window.removeEventListener('pointerout', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+    }, "Test 3: addEventListener/removeEventListener on the window");
+})();
+
+(function() {
+    test(function() {
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+        window.onpointerenter = function() { }
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        window.onpointerenter = function() { }
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        window.onpointerenter = null;
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+    }, "Test 4: setting onpointerenter on the window");
+})();
+
+(function() {
+    var listener = function() { }
+    test(function() {
+        assert_equals(window.internals.pointerEventHandlerCount(document), 0);
+        document.addEventListener('pointerenter', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 1);
+        document.addEventListener('pointerover', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 2);
+        document.addEventListener('pointerleave', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 3);
+        document.addEventListener('pointerout', listener, false);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 4);
+        document.addEventListener('pointermove', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 5);
+        document.addEventListener('pointerup', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 6);
+        document.addEventListener('pointerdown', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 7);
+        document.addEventListener('pointercancel', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 8);
+        document.addEventListener('gotpointercapture', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 9);
+        document.addEventListener('lostpointercapture', listener, true);
+        assert_equals(window.internals.pointerEventHandlerCount(document), 10);
+    }, "Test 5: test addEventListener for all possible pointer event");
+})();
+</script>
+</body>