Bug 1879855 - Test, r=Gijs

Differential Revision: https://phabricator.services.mozilla.com/D195096

browser/base/content/test/popupNotifications/browser_popupNotification_security_delay.js

@@ -400,3 +400,118 @@ add_task(async function test_notificationWindowMove() {
   // Reset window position
   window.moveTo(screenX, screenY);
 });
+
+/**
+ * Tests that the security delay gets extended if a notification is shown during
+ * a full screen transition.
+ */
+add_task(async function test_notificationDuringFullScreenTransition() {
+  await BrowserTestUtils.withNewTab("https://example.com", async browser => {
+    await SpecialPowers.pushPrefEnv({
+      set: [
+        // Set a short security delay so we can observe it being extended.
+        ["security.notification_enable_delay", 1],
+        // Set a longer full screen exit transition so the test works on slow builds.
+        ["full-screen-api.transition-duration.leave", "1000 1000"],
+        // Waive the user activation requirement for full screen requests.
+        // The PoC this test is based on relies on spam clicking which grants
+        // user activation in the popup that requests full screen.
+        // This isn't reliable in automation.
+        ["full-screen-api.allow-trusted-requests-only", false],
+        // macOS native full screen is not affected by the full screen
+        // transition overlap. Test with the old full screen implementation.
+        ["full-screen-api.macos-native-full-screen", false],
+      ],
+    });
+
+    await ensureSecurityDelayReady();
+
+    ok(
+      !PopupNotifications.isPanelOpen,
+      "PopupNotification panel should not be open initially."
+    );
+
+    info("Open a notification.");
+    let popupShownPromise = waitForNotificationPanel();
+    showNotification();
+    await popupShownPromise;
+    ok(
+      PopupNotifications.isPanelOpen,
+      "PopupNotification should be open after show call."
+    );
+
+    let notification = PopupNotifications.getNotification("foo", browser);
+    is(notification?.id, "foo", "There should be a notification with id foo");
+
+    info(
+      "Open a new tab via window.open, enter full screen and remove the tab."
+    );
+
+    let fullScreenTransitionEnded = false;
+    let promiseFullScreenTransitionStart = TestUtils.topicObserved(
+      "fullscreen-transition-start"
+    );
+    let promiseFullScreenTransitionEnd = TestUtils.topicObserved(
+      "fullscreen-transition-end"
+    ).then(() => {
+      fullScreenTransitionEnded = true;
+    });
+    let notificationShownPromise = waitForNotificationPanel();
+
+    await SpecialPowers.spawn(browser, [], () => {
+      // Use eval to execute in the privilege context of the website.
+      content.eval(`
+           let button = document.createElement("button");
+           button.id = "triggerBtn";
+           button.innerText = "Open Popup";
+           button.addEventListener("click", () => {
+             let popup = window.open("about:blank");
+             popup.document.write(
+               "<script>setTimeout(() => document.documentElement.requestFullscreen(), 500)</script>"
+             );
+             popup.document.write(
+               "<script>setTimeout(() => window.close(), 1500)</script>"
+             );
+           });
+           // Insert button at the top so the synthesized click works. Otherwise
+           // the button may be outside of the viewport.
+           document.body.prepend(button);
+         `);
+    });
+
+    await BrowserTestUtils.synthesizeMouseAtCenter("#triggerBtn", {}, browser);
+
+    await promiseFullScreenTransitionStart;
+    info("Full screen transition start");
+    ok(true, "Full screen transition started");
+    ok(!fullScreenTransitionEnded, "Full screen transition is still running.");
+
+    info(
+      "Wait for notification to re-show on tab switch, after the popup has been closed"
+    );
+    await notificationShownPromise;
+
+    info(
+      "Trigger main action via button click during the extended security delay."
+    );
+    triggerMainCommand(PopupNotifications.panel);
+
+    await new Promise(resolve => setTimeout(resolve, 0));
+
+    ok(
+      PopupNotifications.isPanelOpen,
+      "PopupNotification should still be open."
+    );
+    notification = PopupNotifications.getNotification(
+      "foo",
+      gBrowser.selectedBrowser
+    );
+    ok(
+      notification,
+      "Notification should still be open because we clicked during the security delay."
+    );
+
+    info("Wait for full screen transition end.");
+    await promiseFullScreenTransitionEnd;
+  });
+});