public void Execute_Should_ReturnCorrectNumberOfMessages(OrderDirective order, OperationDirective operation)
{
var handler = new OperationHandlerContainer <PersonStub>(OperationHandlers);
var expectedFirstName = EnumUtilities.GetDescription(order);
var expectedLastName = expectedFirstName + EnumUtilities.GetDescription(operation);
var container = handler.GetHandlerContainer(order, operation);
var person = PersonFactory.CreateEmpty();
var messages = new List <string>();
container.InvalidResult += (object sender, ValidationHandlerArgs e) => messages.Add(e.ValidationResult.ErrorMessage);
container.Execute(person);
person.FirstName.Should().Be(expectedFirstName);
person.LastName.Should().Be(expectedLastName);
messages.Count.Should().Be(2);
messages.Should().Contain(expectedFirstName);
messages.Should().Contain(expectedLastName);
}