[flutter_adaptive_scaffold] : Add groupAlignment parameter to standardNavigationRail (#3673)

[flutter_adaptive_scaffold] : Add groupAlignment parameter to standardNavigationRail
diff --git a/packages/flutter_adaptive_scaffold/CHANGELOG.md b/packages/flutter_adaptive_scaffold/CHANGELOG.md
index 32d90c0..793682b 100644
--- a/packages/flutter_adaptive_scaffold/CHANGELOG.md
+++ b/packages/flutter_adaptive_scaffold/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.3
+
+* Fixes `groupAlignment` property not available in `standardNavigationRail` - [flutter/flutter#121994](https://github.com/flutter/flutter/issues/121994)
+
 ## 0.1.2
 
 * Fixes `NavigationRail` items not considering `NavigationRailTheme` values - [flutter/flutter#121135](https://github.com/flutter/flutter/issues/121135)
diff --git a/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart b/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart
index b74c0a4..3eb9ee6 100644
--- a/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart
+++ b/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart
@@ -260,6 +260,7 @@
     Widget? leading,
     Widget? trailing,
     Function(int)? onDestinationSelected,
+    double? groupAlignment,
     IconThemeData? selectedIconTheme,
     IconThemeData? unselectedIconTheme,
     TextStyle? selectedLabelTextStyle,
@@ -286,6 +287,7 @@
                       leading: leading,
                       trailing: trailing,
                       onDestinationSelected: onDestinationSelected,
+                      groupAlignment: groupAlignment,
                       backgroundColor: backgroundColor,
                       extended: extended,
                       selectedIndex: selectedIndex,
diff --git a/packages/flutter_adaptive_scaffold/pubspec.yaml b/packages/flutter_adaptive_scaffold/pubspec.yaml
index 628211f..8157ffb 100644
--- a/packages/flutter_adaptive_scaffold/pubspec.yaml
+++ b/packages/flutter_adaptive_scaffold/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_adaptive_scaffold
 description: Widgets to easily build adaptive layouts, including navigation elements.
-version: 0.1.2
+version: 0.1.3
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_adaptive_scaffold%22
 repository: https://github.com/flutter/packages/tree/main/packages/flutter_adaptive_scaffold
 
diff --git a/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart b/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart
index 3b13d1c..6503538 100644
--- a/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart
+++ b/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart
@@ -499,6 +499,50 @@
       );
     },
   );
+
+  // This test checks whether AdaptiveScaffold.standardNavigationRail function
+  // creates a NavigationRail widget as expected with groupAlignment provided,
+  // and checks whether the NavigationRail's groupAlignment matches the expected value.
+  testWidgets(
+      'groupAligment parameter of AdaptiveScaffold.standardNavigationRail works correctly',
+      (WidgetTester tester) async {
+    const List<NavigationRailDestination> destinations =
+        <NavigationRailDestination>[
+      NavigationRailDestination(
+        icon: Icon(Icons.home),
+        label: Text('Home'),
+      ),
+      NavigationRailDestination(
+        icon: Icon(Icons.account_circle),
+        label: Text('Profile'),
+      ),
+      NavigationRailDestination(
+        icon: Icon(Icons.settings),
+        label: Text('Settings'),
+      ),
+    ];
+
+    // Align to bottom.
+    const double groupAlignment = 1.0;
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: Builder(
+            builder: (BuildContext context) {
+              return AdaptiveScaffold.standardNavigationRail(
+                destinations: destinations,
+                groupAlignment: groupAlignment,
+              );
+            },
+          ),
+        ),
+      ),
+    );
+    final NavigationRail rail =
+        tester.widget<NavigationRail>(find.byType(NavigationRail));
+    expect(rail.groupAlignment, equals(groupAlignment));
+  });
 }
 
 /// An empty widget that implements [PreferredSizeWidget] to ensure that