Validate method throws exception

       //ASYNC
       [TestMethod]
        public void GetTypesByName_WhenNoNameProvided_ThrowsArgumentException()
        {
            //Arrange
            var builder = new TypeServiceBuilder();
            var service = builder.Build();
            
            //Act
            Func<Task> call = async () => await service.GetTypesByName(null);

            //Assert
            call.Should().Throw<ArgumentException>();
        }
        
        //REGULAR
        [TestMethod]
        public void AddTransaction_OnError_AccountUnlocks()
        {
            //Arrange
            var builder = new RepositoryBuilder();
            var context = builder.DefaultAccountDbContext();
            var transaction = GetTestableTransaction(context);
            context.Setup(x => x.SaveChanges())
                .Throws(new UnitTestException("Unit test exception"));
            
            var service = builder
                .WithAccountDbContext(context.Object)
                .Build();

            //Act
            Action action = () => service.AddTransaction(transaction);

            //Assert
            action.Should().Throw<UnitTestException>();
            transaction.Account.Locked.Should().BeFalse();
        }