Desktop: Fixes #11624: Fix double-click to collapse notebooks (#11625)

packages/app-desktop/gui/Sidebar/listItemComponents/FolderItem.tsx

@@ -91,6 +91,7 @@ function FolderItem(props: FolderItemProps) {
 				isConflictFolder={folderId === Folder.conflictFolderId()}
 				selected={selected}
 				shareId={shareId}
+				data-folder-id={folderId}
 				onDoubleClick={onFolderToggleClick_}
 
 				onClick={() => {

packages/app-desktop/integration-tests/sidebar.spec.ts

@@ -101,4 +101,25 @@ test.describe('sidebar', () => {
 		await expect(mainWindow.getByText('Another note in Folder A')).toBeAttached();
 		await expect(mainWindow.getByText('A note in Folder B')).toBeAttached();
 	});
+
+	test('double-clicking should collapse/expand folders in the sidebar', async ({ mainWindow }) => {
+		const mainScreen = await new MainScreen(mainWindow).setup();
+		const sidebar = mainScreen.sidebar;
+
+		const testFolderA = await sidebar.createNewFolder('Folder A');
+		const testFolderB = await sidebar.createNewFolder('Folder B');
+
+		// Convert folder B to a subfolder
+		await testFolderB.dragTo(testFolderA);
+
+		await expect(testFolderB).toBeVisible();
+
+		// Collapse
+		await testFolderA.dblclick();
+		await expect(testFolderB).not.toBeVisible();
+
+		// Expand
+		await testFolderA.dblclick();
+		await expect(testFolderB).toBeVisible();
+	});
 });