1 files changed, 69 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/closed-attribute.window.js b/testing/web-platform/tests/html/browsers/the-window-object/closed-attribute.window.js
new file mode 100644
index 0000000000..88a3beba6f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/closed-attribute.window.js
@@ -0,0 +1,69 @@
+// META: script=/common/get-host-info.sub.js
+
+function closedTest(newWindow, closeNewWindowsBrowsingContext) {
+  assert_equals(newWindow.closed, false);
+  closeNewWindowsBrowsingContext();
+  assert_equals(newWindow.closed, true);
+}
+
+test(() => {
+  const frame = document.body.appendChild(document.createElement("iframe"));
+  closedTest(frame.contentWindow, () => frame.remove());
+}, "closed and same-origin nested browsing context");
+
+test(() => {
+  const openee = window.open();
+  closedTest(openee, () => openee.close());
+
+  // close() is a no-op once "is closing" is set
+  openee.close();
+  assert_equals(openee.closed, true);
+}, "closed/close() and same-origin auxiliary browsing context");
+
+const support = new URL("support/closed.html", location.href).pathname;
+[
+  {
+    type: "cross-origin",
+    url: `${get_host_info().HTTP_REMOTE_ORIGIN}${support}`
+  },
+  {
+    type: "cross-site",
+    url: `${get_host_info().HTTP_NOTSAMESITE_ORIGIN}${support}`
+  }
+].forEach(val => {
+  async_test(t => {
+    const frame = document.createElement("iframe"),
+          ident = `${val.type}-nested-bc`;
+    frame.src = `${val.url}?window=parent&ident=${ident}`;
+    const listener = t.step_func(e => {
+      if (e.data === ident) {
+        closedTest(frame.contentWindow, () => frame.remove());
+        self.removeEventListener("message", listener);
+        t.done();
+      }
+    });
+    // Use a message event rather than onload for consistency with auxiliary browsing contexts.
+    self.addEventListener("message", listener);
+    document.body.append(frame);
+  }, `closed and ${val.type} nested browsing context`);
+
+  async_test(t => {
+    const ident = `${val.type}-auxiliary-bc`,
+          support = new URL("support/closed.html", location.href).pathname,
+          openee = window.open(`${val.url}?window=opener&ident=${ident}`),
+          listener = t.step_func(e => {
+      if (e.data === ident) {
+        closedTest(openee, () => openee.close());
+
+        // close() is a no-op once "is closing" is set
+        openee.close();
+        assert_equals(openee.closed, true);
+
+        self.removeEventListener("message", listener);
+        t.done();
+      }
+    });
+    // As there's no cross-origin onload, use a message event.
+    self.addEventListener("message", listener);
+  }, `closed/close() and ${val.type} auxiliary browsing context`);
+});