Add PointerEvent interface to Sky

sky/tests/events/pointer-events.sky

Index: sky/tests/events/pointer-events.sky
diff --git a/sky/tests/events/pointer-events.sky b/sky/tests/events/pointer-events.sky
new file mode 100644
index 0000000000000000000000000000000000000000..57ee4e9921a3006264b6a001f9cf4bbd5494db04
--- /dev/null
+++ b/sky/tests/events/pointer-events.sky
@@ -0,0 +1,16 @@
+<sky>
+<import src="../resources/chai.sky" />
+<import src="../resources/mocha.sky" />
+<script>
+describe("Pointer events", function() {
+  it("should be constructable", function() {
+    var evt = new PointerEvent("pointerdown", {
+      kind: "touch",
+    });
+    assert.ok(evt);
+    assert.equal(evt.kind, "touch");
+    assert.equal(evt.radiusMajor, 0);
+  });
+});
+</script>
+</sky>