add connectivity integration

flutter/lib/src/integrations/connectivity_integration.dart

@@ -0,0 +1,57 @@
+import 'dart:async';
+
+import 'package:connectivity_plus/connectivity_plus.dart';
+import 'package:meta/meta.dart';
+import '../../sentry_flutter.dart';
+
+class ConnectivityIntegration extends Integration<SentryFlutterOptions> {
+  Connectivity connectivity = Connectivity();
+  Hub? _hub;
+  StreamSubscription<ConnectivityResult>? _subscription;
+
+  @override
+  void call(Hub hub, SentryFlutterOptions options) {
+    _hub = hub;
+    _subscription = connectivity.onConnectivityChanged.listen(addBreadcrumb);
+
+    options.sdk.addIntegration('connectivityIntegration');
+  }
+
+  @override
+  void close() {
+    _hub = null;
+    _subscription?.cancel();
+    _subscription = null;
+  }
+
+  @internal
+  @visibleForTesting
+  void addBreadcrumb(ConnectivityResult result) {
+    _hub?.addBreadcrumb(
+      Breadcrumb(
+          category: 'device.connectivity',
+          level: SentryLevel.info,
+          type: 'connectivity',
+          data: {'connectivity': result.toSentryConnectivity()}),
+    );
+  }
+}
+
+extension on ConnectivityResult {
+  String toSentryConnectivity() {
+    switch (this) {
+      case ConnectivityResult.bluetooth:
+      case ConnectivityResult.vpn:
+      case ConnectivityResult.wifi:
+        return 'wifi';
+      case ConnectivityResult.ethernet:
+        return 'ethernet';
+      case ConnectivityResult.mobile:
+        return 'cellular';
+      case ConnectivityResult.none:
+        return 'none';
+      case ConnectivityResult.other:
+        return 'other';
+    }
+  }
+}

flutter/pubspec.yaml

@@ -19,6 +19,7 @@ dependencies:
   package_info_plus: '>=1.0.0 <=5.0.1'
   meta: ^1.3.0
   ffi: ^2.0.0
+  connectivity_plus: ^5.0.2
 
 dev_dependencies:
   build_runner: ^2.4.2

flutter/test/integrations/connectivity_integration_test.dart

@@ -0,0 +1,149 @@
+import 'package:connectivity_plus/connectivity_plus.dart';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mockito/mockito.dart';
+import 'package:sentry/sentry.dart';
+import 'package:sentry_flutter/src/integrations/connectivity_integration.dart';
+import 'package:sentry_flutter/src/sentry_flutter_options.dart';
+
+import '../mocks.dart';
+import '../mocks.mocks.dart';
+
+void main() {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  late Fixture fixture;
+
+  setUp(() {
+    fixture = Fixture();
+  });
+
+  verifyBreadcrumb(Breadcrumb crumb, String connectivityData) {
+    expect(crumb.category, 'device.connectivity');
+    expect(crumb.type, 'connectivity');
+    expect(crumb.level, SentryLevel.info);
+    expect(crumb.data?['connectivity'], connectivityData);
+  }
+
+  test('adds integration', () {
+    final sut = fixture.getSut();
+    sut(fixture.hub, fixture.options);
+
+    expect(fixture.options.sdk.integrations.contains('connectivityIntegration'),
+        true);
+  });
+
+  test(
+      '$ConnectivityIntegration: connectivity changed `bluetooth` adds `wifi` breadcrumb',
+      () {
+    final integration = fixture.getSut();
+    integration.call(fixture.hub, fixture.options);
+
+    integration.addBreadcrumb(ConnectivityResult.bluetooth);
+
+    final crumb = verify(
+      fixture.hub.addBreadcrumb(captureAny),
+    ).captured.first as Breadcrumb;
+
+    verifyBreadcrumb(crumb, 'wifi');
+  });
+
+  test(
+      '$ConnectivityIntegration: connectivity changed `wifi` adds `wifi` breadcrumb',
+      () {
+    final integration = fixture.getSut();
+    integration.call(fixture.hub, fixture.options);
+
+    integration.addBreadcrumb(ConnectivityResult.wifi);
+
+    final crumb = verify(
+      fixture.hub.addBreadcrumb(captureAny),
+    ).captured.first as Breadcrumb;
+
+    verifyBreadcrumb(crumb, 'wifi');
+  });
+
+  test(
+      '$ConnectivityIntegration: connectivity changed `vpn` adds `vpn` breadcrumb',
+      () {
+    final integration = fixture.getSut();
+    integration.call(fixture.hub, fixture.options);
+
+    integration.addBreadcrumb(ConnectivityResult.vpn);
+
+    final crumb = verify(
+      fixture.hub.addBreadcrumb(captureAny),
+    ).captured.first as Breadcrumb;
+
+    verifyBreadcrumb(crumb, 'wifi');
+  });
+
+  test(
+      '$ConnectivityIntegration: connectivity changed `ethernet` adds `ethernet` breadcrumb',
+      () {
+    final integration = fixture.getSut();
+    integration.call(fixture.hub, fixture.options);
+
+    integration.addBreadcrumb(ConnectivityResult.ethernet);
+
+    final crumb = verify(
+      fixture.hub.addBreadcrumb(captureAny),
+    ).captured.first as Breadcrumb;
+
+    verifyBreadcrumb(crumb, 'ethernet');
+  });
+
+  test(
+      '$ConnectivityIntegration: connectivity changed `mobile` adds  `cellular` breadcrumb',
+      () {
+    final integration = fixture.getSut();
+    integration.call(fixture.hub, fixture.options);
+
+    integration.addBreadcrumb(ConnectivityResult.mobile);
+
+    final crumb = verify(
+      fixture.hub.addBreadcrumb(captureAny),
+    ).captured.first as Breadcrumb;
+
+    verifyBreadcrumb(crumb, 'cellular');
+  });
+
+  test(
+      '$ConnectivityIntegration: connectivity changed `other` adds `other` breadcrumb',
+      () {
+    final integration = fixture.getSut();
+    integration.call(fixture.hub, fixture.options);
+
+    integration.addBreadcrumb(ConnectivityResult.other);
+
+    final crumb = verify(
+      fixture.hub.addBreadcrumb(captureAny),
+    ).captured.first as Breadcrumb;
+
+    verifyBreadcrumb(crumb, 'other');
+  });
+
+  test(
+      '$ConnectivityIntegration: connectivity changed `none` adds `none` breadcrumb',
+      () {
+    final integration = fixture.getSut();
+    integration.call(fixture.hub, fixture.options);
+
+    integration.addBreadcrumb(ConnectivityResult.none);
+
+    final crumb = verify(
+      fixture.hub.addBreadcrumb(captureAny),
+    ).captured.first as Breadcrumb;
+
+    verifyBreadcrumb(crumb, 'none');
+  });
+}
+
+class Fixture {
+  final hub = MockHub();
+  final options = SentryFlutterOptions(dsn: fakeDsn);
+
+  ConnectivityIntegration getSut() {
+    return ConnectivityIntegration();
+  }
+}