Update the pointer boundary event tests in pointerevent_after_target_…

…appended.html to align with the spec

As discussed in web-platform-tests/interop#380, the
pointer boundary event should be fired only when the hoverable pointer is
actually moved.

Differential Revision: https://phabricator.services.mozilla.com/D204618

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1885223
gecko-commit: 5b2aa85f993f54ee31e8b5f401714e38bd8705b4
gecko-reviewers: masayuki

pointerevents/pointerevent_after_target_appended.html

@@ -92,6 +92,9 @@
 
       let actions = new test_driver.Actions()
           .addPointer("TestPointer", pointer_type)
+          // The offset argument of pointerMove action is relative to the
+          // central point of the origin element. So this moves the pointer to
+          // the parent actually.
           .pointerMove(-30, -30, {origin: parent})
           .pointerDown()
           .pointerUp()
@@ -133,6 +136,9 @@
 
       let actions = new test_driver.Actions()
           .addPointer("TestPointer", pointer_type)
+          // The offset argument of pointerMove action is relative to the
+          // central point of the origin element. So this moves the pointer to
+          // the parent actually.
           .pointerMove(-30, -30, {origin: parent})
           .pointerDown()
           .pointerUp()
@@ -158,29 +164,57 @@
   setup();
 
   // Tests for dispatched pointer events.
-  addPromiseTestForNewChild("pointerdown", "pointer", [
-    "pointerover@parent", "pointerenter@parent",
-    "pointerdown@parent", "(child-attached)",
-    "pointerout@parent", "pointerover@child", "pointerenter@child",
-    "pointerup@child",
-    "pointerdown@child", "pointerup@child",
-    "pointerout@child", "pointerleave@child", "pointerleave@parent"
-  ]);
+  addPromiseTestForNewChild(
+    "pointerdown",
+    "pointer",
+    pointer_type == "mouse"
+      // Pointer boundary events should be fired only when the hoverable pointer
+      // is actually moved and pointerup doesn't imply the pointer move.
+      ? [
+        "pointerover@parent", "pointerenter@parent",
+        "pointerdown@parent", "(child-attached)", "pointerup@child",
+        "pointerout@parent", "pointerover@child", "pointerenter@child",
+        "pointerdown@child", "pointerup@child",
+        "pointerout@child", "pointerleave@child", "pointerleave@parent"
+      ]
+      : [
+        "pointerover@parent", "pointerenter@parent",
+        "pointerdown@parent", "(child-attached)",
+        "pointerout@parent", "pointerover@child", "pointerenter@child",
+        "pointerup@child",
+        "pointerdown@child", "pointerup@child",
+        "pointerout@child", "pointerleave@child", "pointerleave@parent"
+      ]
+  );
   addPromiseTestForNewChild("pointerup", "pointer", [
     "pointerover@parent", "pointerenter@parent",
     "pointerdown@parent", "pointerup@parent", "(child-attached)",
     "pointerout@parent", "pointerover@child", "pointerenter@child",
     "pointerdown@child", "pointerup@child",
     "pointerout@child", "pointerleave@child", "pointerleave@parent"
   ]);
-  addPromiseTestForMovedChild("pointerdown", "pointer", [
-    "pointerover@child", "pointerenter@parent", "pointerenter@child",
-    "pointerdown@child", "(child-moved)",
-    "pointerover@child", "pointerenter@child",
-    "pointerup@child",
-    "pointerdown@child", "pointerup@child",
-    "pointerout@child", "pointerleave@child", "pointerleave@parent"
-  ]);
+  addPromiseTestForMovedChild(
+    "pointerdown",
+    "pointer",
+    pointer_type == "mouse"
+      // Pointer boundary events should be fired only when the hoverable pointer
+      // is actually moved and pointerup doesn't imply the pointer move.
+      ? [
+        "pointerover@child", "pointerenter@parent", "pointerenter@child",
+        "pointerdown@child", "(child-moved)", "pointerup@child",
+        "pointerover@child", "pointerenter@child",
+        "pointerdown@child", "pointerup@child",
+        "pointerout@child", "pointerleave@child", "pointerleave@parent"
+      ]
+      : [
+        "pointerover@child", "pointerenter@parent", "pointerenter@child",
+        "pointerdown@child", "(child-moved)",
+        "pointerover@child", "pointerenter@child",
+        "pointerup@child",
+        "pointerdown@child", "pointerup@child",
+        "pointerout@child", "pointerleave@child", "pointerleave@parent"
+      ]
+  );
   addPromiseTestForMovedChild("pointerup", "pointer", [
     "pointerover@child", "pointerenter@parent", "pointerenter@child",
     "pointerdown@child", "pointerup@child", "(child-moved)",