test: hold the show collection's type, an unknown title's 404 and Brave's fullscreen stand-in

frontend/src/components/PlayerModal.dom.test.tsx

@@ -678,6 +678,12 @@ describe("PlayerModal — the docked bar's fullscreen", () => {
         configurable: true,
         value: () => Promise.resolve(),
       });
+    // Brave's stand-in otherwise: a <video>-only requestFullscreen on HTMLElement.prototype.
+    else
+      Object.defineProperty(HTMLElement.prototype, "requestFullscreen", {
+        configurable: true,
+        value: () => true,
+      });
     vi.spyOn(api, "videoDetail").mockReturnValue(new Promise(() => {}));
     const A = vid("A", 0);
     renderModal(
@@ -688,6 +694,7 @@ describe("PlayerModal — the docked bar's fullscreen", () => {
   };
   afterEach(() => {
     delete (Element.prototype as { requestFullscreen?: unknown }).requestFullscreen;
+    delete (HTMLElement.prototype as { requestFullscreen?: unknown }).requestFullscreen;
   });
 
   it("is offered where the browser can fullscreen an element", () => {