public void AllElementsCantDecide_AllCalled()
{
// Arrange
int someVal = 10;
ChainDecision expected = ChainDecision.CantSay;
var element1 = MockRepository.GenerateStub <IChainElement <int> >();
var element2 = MockRepository.GenerateStub <IChainElement <int> >();
var element3 = MockRepository.GenerateStub <IChainElement <int> >();
element1.Stub(c => c.Process(someVal)).Return(ChainDecision.CantSay);
element2.Stub(c => c.Process(someVal)).Return(ChainDecision.CantSay);
element3.Stub(c => c.Process(someVal)).Return(ChainDecision.CantSay);
var provider = MockRepository.GenerateStub <IChainElementsProvider <int> >();
provider.Stub(c => c.GetElements()).Return(new[] { element1, element2, element3 });
IChainOfResponsibility <int> chain = new ChainOfResponsibility <int>(provider);
// Act
ChainDecision result = chain.Process(someVal);
// Assert
element1.AssertWasCalled(s => s.Process(someVal));
element2.AssertWasCalled(s => s.Process(someVal));
element3.AssertWasCalled(s => s.Process(someVal));
Assert.AreEqual(expected, result);
}
public void SecondElementCanDecide_FirstAndSecondCalled()
{
// Arrange
int someVal = 10;
ChainDecision expected = ChainDecision.Passed;
IChainOfResponsibility <int> chain = new ChainOfResponsibility <int>();
var element1 = MockRepository.GenerateStub <IChainElement <int> >();
var element2 = MockRepository.GenerateStub <IChainElement <int> >();
var element3 = MockRepository.GenerateStub <IChainElement <int> >();
element1.Stub(c => c.Process(someVal)).Return(ChainDecision.CantSay);
element2.Stub(c => c.Process(someVal)).Return(expected);
chain.Add(element1);
chain.Add(element2);
chain.Add(element3);
// Act
ChainDecision result = chain.Process(someVal);
// Assert
element1.AssertWasCalled(s => s.Process(someVal));
element2.AssertWasCalled(s => s.Process(someVal));
element3.AssertWasNotCalled(s => s.Process(Arg <int> .Is.Anything));
Assert.AreEqual(expected, result);
}
public ChainDecision Process(T item)
{
foreach (var chainElement in this.chain)
{
ChainDecision decision = chainElement.Process(item);
if (decision != ChainDecision.CantSay)
{
return(decision);
}
}
return(ChainDecision.CantSay);
}
