feat(connectivity_plus): add checkConnectivity.hasConnectivity() utility getter

packages/connectivity_plus/connectivity_plus/lib/connectivity_plus.dart

@@ -41,12 +41,22 @@ class Connectivity {
   /// status changes, this is a known issue that only affects simulators.
   /// For details see https://github.com/fluttercommunity/plus_plugins/issues/479.
   ///
-  /// The emitted list is never empty. In case of no connectivity, the list contains
+  /// The emitted list is never empty.
+  /// {@template no_connectivity_case}
+  /// In case of no connectivity, the list contains
   /// a single element of [ConnectivityResult.none]. Note also that this is the only
   /// case where [ConnectivityResult.none] is present.
   ///
+  /// Use `hasConnectivity` to determine whether any active network connection exists:
+  ///
+  /// ```dart
+  /// final result = await checkConnectivity();
+  /// print(result.hasConnectivity);
+  /// ```
+  /// {@endtemplate}
+  ///
   /// This method applies [Stream.distinct] over the received events to ensure
-  /// only emiting when connectivity changes.
+  /// only emitting when connectivity changes.
   Stream<List<ConnectivityResult>> get onConnectivityChanged {
     return _platform.onConnectivityChanged.distinct((a, b) => a.equals(b));
   }
@@ -57,9 +67,8 @@ class Connectivity {
   /// make a network request, it only gives you the radio status. Instead, listen
   /// for connectivity changes via [onConnectivityChanged] stream.
   ///
-  /// The returned list is never empty. In case of no connectivity, the list contains
-  /// a single element of [ConnectivityResult.none]. Note also that this is the only
-  /// case where [ConnectivityResult.none] is present.
+  /// The returned list is never empty.
+  /// {@macro no_connectivity_case}
   Future<List<ConnectivityResult>> checkConnectivity() {
     return _platform.checkConnectivity();
   }

packages/connectivity_plus/connectivity_plus_platform_interface/lib/src/enums.dart

@@ -36,3 +36,8 @@ enum ConnectivityResult {
   /// Other: Device is connected to an unknown network
   other
 }
+
+extension ConnectivityResultListX on List<ConnectivityResult> {
+  bool get hasConnectivity =>
+      !(length == 1 && first == ConnectivityResult.none);
+}

packages/connectivity_plus/connectivity_plus_platform_interface/pubspec.yaml

@@ -17,4 +17,5 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  test: ^1.31.0
   flutter_lints: ">=4.0.0 <6.0.0"

packages/connectivity_plus/connectivity_plus_platform_interface/test/src/enums_test.dart

@@ -0,0 +1,22 @@
+import 'package:connectivity_plus_platform_interface/src/enums.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('List<$ConnectivityResult>.hasConnectivity', () {
+    test('returns false when only none is present', () {
+      final result = [ConnectivityResult.none];
+      expect(result.hasConnectivity, false, reason: 'list: $result');
+    });
+
+    test('returns true when wifi is present', () {
+      final result = [ConnectivityResult.wifi];
+      expect(result.hasConnectivity, true, reason: 'list: $result');
+    });
+
+    test('returns true when multiple connections exist', () {
+      final result = ConnectivityResult.values.toList()
+        ..removeWhere((e) => e == ConnectivityResult.none);
+      expect(result.hasConnectivity, true, reason: 'list: $result');
+    });
+  });
+}