Update web-platform-tests to revision 592e2ed83ecd717392d37047536250ba74f1bafa

tests/wpt/web-platform-tests/dom/events/relatedTarget.window.js

@@ -0,0 +1,85 @@
+// https://dom.spec.whatwg.org/#concept-event-dispatch
+
+const host = document.createElement("div"),
+      child = host.appendChild(document.createElement("p")),
+      shadow = host.attachShadow({ mode: "closed" }),
+      slot = shadow.appendChild(document.createElement("slot"));
+
+test(() => {
+  for (target of [shadow, slot]) {
+    for (relatedTarget of [new XMLHttpRequest(), self, host]) {
+      const event = new FocusEvent("demo", { relatedTarget: relatedTarget });
+      target.dispatchEvent(event);
+      assert_equals(event.target, null);
+      assert_equals(event.relatedTarget, null);
+    }
+  }
+}, "Reset if target pointed to a shadow tree");
+
+test(() => {
+  for (relatedTarget of [shadow, slot]) {
+    for (target of [new XMLHttpRequest(), self, host]) {
+      const event = new FocusEvent("demo", { relatedTarget: relatedTarget });
+      target.dispatchEvent(event);
+      assert_equals(event.target, null);
+      assert_equals(event.relatedTarget, null);
+    }
+  }
+}, "Reset if relatedTarget pointed to a shadow tree");
+
+async_test(t => {
+  const shadowChild = shadow.appendChild(document.createElement("div"));
+  shadowChild.addEventListener("demo", t.step_func(() => document.body.appendChild(shadowChild)));
+  const event = new FocusEvent("demo", { relatedTarget: new XMLHttpRequest() });
+  shadowChild.dispatchEvent(event);
+  assert_equals(shadowChild.parentNode, document.body);
+  assert_equals(event.target, null);
+  assert_equals(event.relatedTarget, null);
+  shadowChild.remove();
+  t.done();
+}, "Reset if target pointed to a shadow tree pre-dispatch");
+
+async_test(t => {
+  const shadowChild = shadow.appendChild(document.createElement("div"));
+  shadowChild.addEventListener("demo", t.step_func(() => document.body.appendChild(shadowChild)));
+  const event = new FocusEvent("demo", { relatedTarget: shadowChild });
+  document.body.dispatchEvent(event);
+  assert_equals(shadowChild.parentNode, document.body);
+  assert_equals(event.target, null);
+  assert_equals(event.relatedTarget, null);
+  shadowChild.remove();
+  t.done();
+}, "Reset if relatedTarget pointed to a shadow tree pre-dispatch");
+
+async_test(t => {
+  const event = new FocusEvent("heya", { relatedTarget: shadow, cancelable: true }),
+        callback = t.unreached_func();
+  host.addEventListener("heya", callback);
+  t.add_cleanup(() => host.removeEventListener("heya", callback));
+  event.preventDefault();
+  assert_true(event.defaultPrevented);
+  assert_false(host.dispatchEvent(event));
+  assert_equals(event.target, null);
+  assert_equals(event.relatedTarget, null);
+  // Check that the dispatch flag is cleared
+  event.initEvent("x");
+  assert_equals(event.type, "x");
+  t.done();
+}, "Reset targets on early return");
+
+async_test(t => {
+  const input = document.body.appendChild(document.createElement("input")),
+        event = new MouseEvent("click", { relatedTarget: shadow });
+  let seen = false;
+  t.add_cleanup(() => input.remove());
+  input.type = "checkbox";
+  input.oninput = t.step_func(() => {
+    assert_equals(event.target, null);
+    assert_equals(event.relatedTarget, null);
+    assert_equals(event.composedPath().length, 0);
+    seen = true;
+  });
+  assert_true(input.dispatchEvent(event));
+  assert_true(seen);
+  t.done();
+}, "Reset targets before activation behavior");