fix: win.closeFilePreview recreates panel when called twice (#45319)

* fix: close quick look during tests on macOS

* use longer delay :shrug:

* fix: sharedPreviewPanel being recreated on close

* test: ensure preview panel gets closed

shell/browser/native_window_mac.mm

@@ -1596,8 +1596,11 @@ void NativeWindowMac::PreviewFile(const std::string& path,
 }
 
 void NativeWindowMac::CloseFilePreview() {
-  if ([QLPreviewPanel sharedPreviewPanelExists]) {
+  // Need to be careful about checking [QLPreviewPanel sharedPreviewPanel] as
+  // simply accessing it will cause it to reinitialize and reappear.
+  if ([QLPreviewPanel sharedPreviewPanelExists] && preview_item_) {
     [[QLPreviewPanel sharedPreviewPanel] close];
+    preview_item_ = nil;
   }
 }
 

spec/api-browser-window-spec.ts

@@ -6256,6 +6256,7 @@ describe('BrowserWindow module', () => {
       w.previewFile(__filename);
       await setTimeout(500);
       expect(showCalled).to.equal(false, 'should not have called show twice');
+      w.closeFilePreview();
     });
   });