Added tests

permission_handler/pubspec.yaml

@@ -19,7 +19,10 @@ dependencies:
   permission_handler_platform_interface: ^3.1.0
 
 dev_dependencies:
+  flutter_test:
+    sdk: flutter
   effective_dart: ^1.3.0
+  mockito: ^5.0.0-nullsafety.7
   plugin_platform_interface: ^2.0.0
 
 environment:

permission_handler/test/permission_handler_test.dart

+import 'package:flutter_test/flutter_test.dart';
+import 'package:permission_handler/permission_handler.dart';
+import 'package:permission_handler_platform_interface/permission_handler_platform_interface.dart';
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+import 'package:mockito/mockito.dart';
+
+void main() {
+  group('PermissionHandler', (){
+    setUp(() {
+      PermissionHandlerPlatform.instance = MockPermissionHandlerPlatform();
+    });
+
+    test('PermissionActions on Permission: get status', () async {
+      final permissionStatus = await Permission.calendar.status;
+
+      expect(permissionStatus, PermissionStatus.granted);
+    });
+
+    test('PermissionActions on Permission: get shouldShowRequestRationale',
+            () async {
+      final requestRationale =
+            await Permission.calendar.shouldShowRequestRationale;
+
+      expect(requestRationale, false);
+    });
+
+    test('PermissionActions on Permission: request()', () async {
+      final permissionRequestMap = Permission.calendar.request();
+
+      expect(permissionRequestMap, isA<Future<PermissionStatus>>());
+    });
+
+    test('PermissionCheckShortcuts on Permission: get isGranted', () async {
+      final isGranted = await Permission.calendar.isGranted;
+      expect(isGranted, true);
+    });
+
+    test('PermissionCheckShortcuts on Permission: get isDenied', () async {
+      final isDenied = await Permission.calendar.isDenied;
+      expect(isDenied, false);
+    });
+
+    test('PermissionCheckShortcuts on Permission: get isRestricted', () async {
+      final isRestricted = await Permission.calendar.isRestricted;
+      expect(isRestricted, false);
+    });
+
+    test('PermissionCheckShortcuts on Permission: get isPermanentlyDenied', () async {
+      final isPermanentlyDenied = await Permission.calendar.isPermanentlyDenied;
+      expect(isPermanentlyDenied, false);
+    });
+
+    test('ServicePermissionActions on PermissionWithService: get serviceStatus', () async {
+      //TODO: Implement
+    });
+
+  });
+}
+
+class MockPermissionHandlerPlatform extends Mock
+    with
+        MockPlatformInterfaceMixin
+    implements
+        PermissionHandlerPlatform {
+
+  @override
+  Future<PermissionStatus> checkPermissionStatus(Permission permission) =>
+      Future.value(PermissionStatus.granted);
+
+
+  @override
+  Future<ServiceStatus> checkServiceStatus(Permission permission) =>
+      Future.value(ServiceStatus.enabled);
+
+  @override
+  Future<bool> openAppSettings() => Future.value(true);
+
+  @override
+  Future<Map<Permission, PermissionStatus>> requestPermissions(List<Permission> permissions) {
+    Map<Permission, PermissionStatus> permissionsMap = {};
+    return Future.value(permissionsMap);
+  }
+
+  @override
+  Future<bool> shouldShowRequestPermissionRationale(Permission permission) =>
+      Future.value(true);
+}
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