feat(tests): added services tests and fixtures

test/features/create_plan/services/create_plan_service_test.dart

@@ -0,0 +1,30 @@
+import 'package:dio/dio.dart';
+import 'package:eatvio_app/features/create_plan/services/create_plan_service.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mockito/annotations.dart';
+import 'package:mockito/mockito.dart';
+
+import 'create_plan_service_test.mocks.dart';
+
+@GenerateNiceMocks([MockSpec<CreatePlanService>()])
+void main() {
+  group('CreatePlanService', () {
+    late MockCreatePlanService mockCreatePlanService;
+
+    setUp(() {
+      mockCreatePlanService = MockCreatePlanService();
+    });
+
+    test('createPlan - создает план', () async {
+      final formData = FormData.fromMap({});
+
+      when(mockCreatePlanService.createPlan(formData: formData))
+          .thenAnswer((_) async => Future.value());
+
+      await mockCreatePlanService.createPlan(formData: formData);
+
+      verify(mockCreatePlanService.createPlan(formData: formData)).called(1);
+    });
+  });
+}
+