Adding PermissionOperation tests + minor fixes

MainProject.Tests/TestsUtils/ExceptionSqlServerContext.cs

@@ -0,0 +1,24 @@
+using BasicDotnetTemplate.MainProject.Core.Database;
+using Microsoft.EntityFrameworkCore;
+using BasicDotnetTemplate.MainProject.Models.Database.SqlServer;
+using Newtonsoft.Json;
+
+namespace BasicDotnetTemplate.MainProject.Tests;
+
+public class ExceptionSqlServerContext : SqlServerContext
+{
+    public bool ThrowExceptionOnSave { get; set; }
+
+    public ExceptionSqlServerContext() : base(TestUtils.CreateInMemorySqlContextOptions())
+    {
+    }
+
+    public override Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
+    {
+        if (ThrowExceptionOnSave)
+        {
+            throw new Exception("Database error");
+        }
+        return base.SaveChangesAsync(cancellationToken);
+    }
+}