Add tests

BudgetApp/Services/DashboardService.cs

@@ -2,18 +2,11 @@ using BudgetApp.Data;
 
 namespace BudgetApp.Services;
 
-public class DashboardService
+public class DashboardService(TransactionService transactionService, AccountService accountService, CategoryService categoryService)
 {
-    private readonly TransactionService _transactionService;
-    private readonly AccountService _accountService;
-    private readonly CategoryService _categoryService;
-
-    public DashboardService(TransactionService transactionService, AccountService accountService, CategoryService categoryService)
-    {
-        _transactionService = transactionService;
-        _accountService = accountService;
-        _categoryService = categoryService;
-    }
+    private readonly TransactionService _transactionService = transactionService;
+    private readonly AccountService _accountService = accountService;
+    private readonly CategoryService _categoryService = categoryService;
 
     public async Task<DashboardData> GetDashboardDataAsync(string userId, DateTime? from = null, DateTime? to = null)
     {
@@ -53,7 +46,7 @@ public class DashboardService
         };
     }
 
-    private static ChartData BuildChartData(List<Account> accounts, List<Transaction> transactions, DateTime startDate, DateTime endDate)
+    internal static ChartData BuildChartData(List<Account> accounts, List<Transaction> transactions, DateTime startDate, DateTime endDate)
     {
         var today = DateTime.Today;
         var labels = new List<string>();