Bug 1457485 [wpt PR 10686] - HTML: document.open() event listener removal, a=testonly

Automatic update from web-platform-testsHTML: document.open() event listener removal

For https://github.com/whatwg/html/pull/3653.
--

wpt-commits: 923d852c61cb50cb3be540dcbf54f2d5ec1518e1
wpt-pr: 10686

testing/web-platform/meta/MANIFEST.json

@@ -333529,6 +333529,12 @@
      {}
     ]
    ],
+   "html/dom/dynamic-markup-insertion/opening-the-input-stream/event-listeners.window.js": [
+    [
+     "/html/dom/dynamic-markup-insertion/opening-the-input-stream/event-listeners.window.html",
+     {}
+    ]
+   ],
    "html/dom/dynamic-markup-insertion/opening-the-input-stream/mutation-events.window.js": [
     [
      "/html/dom/dynamic-markup-insertion/opening-the-input-stream/mutation-events.window.html",
@@ -564404,6 +564410,10 @@
    "a2a5acc9dfe53c7482eeaa4be3a4819238f8e120",
    "testharness"
   ],
+  "html/dom/dynamic-markup-insertion/opening-the-input-stream/event-listeners.window.js": [
+   "ccf357a8081b99de1d85e05196145e83b3de2ab5",
+   "testharness"
+  ],
   "html/dom/dynamic-markup-insertion/opening-the-input-stream/mutation-events.window.js": [
    "1e1c656e1d19c9c459faf16327e099a4c9e13872",
    "testharness"

testing/web-platform/tests/html/dom/dynamic-markup-insertion/opening-the-input-stream/event-listeners.window.js

@@ -0,0 +1,42 @@
+test(t => {
+  const frame = document.body.appendChild(document.createElement("iframe")),
+        body = frame.contentDocument.body;
+  t.add_cleanup(() => frame.remove());
+  frame.contentDocument.addEventListener("x", t.unreached_func("document event listener not removed"));
+  body.addEventListener("x", t.unreached_func("body event listener not removed"));
+  frame.contentDocument.open();
+  frame.contentDocument.dispatchEvent(new Event("x"));
+  body.dispatchEvent(new Event("x"));
+  frame.contentDocument.close();
+}, "Event listeners are to be removed");
+
+test(t => {
+  const frame = document.body.appendChild(document.createElement("iframe"));
+  t.add_cleanup(() => frame.remove());
+  let once = false;
+  frame.contentDocument.addEventListener("x", () => {
+    frame.contentDocument.open();
+    once = true;
+  });
+  frame.contentDocument.addEventListener("x", t.unreached_func("second event listener not removed"));
+  frame.contentDocument.dispatchEvent(new Event("x"));
+  assert_true(once);
+  frame.contentDocument.close();
+}, "Event listeners are to be removed with immediate effect");
+
+test(t => {
+  const frame = document.body.appendChild(document.createElement("iframe")),
+        shadow = frame.contentDocument.body.attachShadow({ mode: "closed" }),
+        shadowChild = shadow.appendChild(document.createElement("div")),
+        shadowShadow = shadowChild.attachShadow({ mode: "open" }),
+        nodes = [shadow, shadowChild, shadowShadow];
+  t.add_cleanup(() => frame.remove());
+  nodes.forEach(node => {
+    node.addEventListener("x", t.unreached_func(node + "'s event listener not removed"));
+  });
+  frame.contentDocument.open();
+  nodes.forEach(node => {
+    node.dispatchEvent(new Event("x"));
+  });
+  frame.contentDocument.close();
+}, "Event listeners are to be removed from shadow trees as well");