settings mock and database mock in test folder

lib/globals.dart

@@ -1,10 +1,8 @@
 library app.globals;
 
-import 'package:smoke_cess_app/mock/db_mock.dart';
 import 'package:smoke_cess_app/services/database_service.dart';
 
-DatabaseService databaseService = DatabaseMock();
-//  DatabaseService databaseService = DatabaseService.instance;
+DatabaseService databaseService = DatabaseService.instance;
 
 // set this to read settings from local json file instead of scanning a qr code
 bool useLocalConfig = false;

test/mock/settings_mock.dart

@@ -1,3 +1,5 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
 Map<String, Object> mockSettings = {
   "group": 3,
   "HITT_time": 35,
@@ -15,3 +17,6 @@ Map<String, Object> mockSettings = {
   },
   "startedAt": DateTime.now().toIso8601String(),
 };
+
+void mockSharedPreferences() =>
+    SharedPreferences.setMockInitialValues(mockSettings);