public void ShouldReturnValueFromFuncWhenInvoked()
{
var toReturn = new object();
var fakeMethod = new FakeFunc<object, object, object>((o1, o2) => toReturn);
var returned = fakeMethod.Invoke(null, null);
Assert.AreSame(toReturn, returned);
}
public void ShouldPassParameterToFuncWhenFakeFuncIsInvoked()
{
var p1 = new object();
var p2 = new object();
var fakeMethod = new FakeFunc<object, object, object>((o1, o2) => null);
fakeMethod.Invoke(p1, p2);
Assert.AreSame(p1, fakeMethod.Invocations.First().FirstParameter);
Assert.AreSame(p2, fakeMethod.Invocations.First().SecondParameter);
}
public void ShouldInvokeProvidedActionWhenFakeFuncIsInvoked()
{
bool actionCalled = false;
Func<object, object, object> func = (o1, o2) =>
{
actionCalled = true;
return null;
};
object ignored = null;
var fakeMethod = new FakeFunc<object, object, object>(func);
fakeMethod.Invoke(ignored, ignored);
Assert.IsTrue(actionCalled);
}
public void ShouldKeepTrackOfParametersForConsecutiveInvocations()
{
var first1 = new object();
var second1 = new object();
var third1 = new object();
var first2 = new object();
var second2 = new object();
var third2 = new object();
var fakeMethod = new FakeFunc<object, object, object>((o1, o2) => null);
fakeMethod.Invoke(first1, first2);
fakeMethod.Invoke(second1, second2);
fakeMethod.Invoke(third1, third2);
Assert.AreSame(first1, fakeMethod.Invocations.ElementAt(0).FirstParameter);
Assert.AreSame(first2, fakeMethod.Invocations.ElementAt(0).SecondParameter);
Assert.AreSame(second1, fakeMethod.Invocations.ElementAt(1).FirstParameter);
Assert.AreSame(second2, fakeMethod.Invocations.ElementAt(1).SecondParameter);
Assert.AreSame(third1, fakeMethod.Invocations.ElementAt(2).FirstParameter);
Assert.AreSame(third2, fakeMethod.Invocations.ElementAt(2).SecondParameter);
}
public void ShouldIncreaseNumberOfInvocationsEachTimeFakeFuncIsInvoked()
{
Func<object, object, object> func = (o1, o2) => null;
object ignored = null;
var fakeMethod = new FakeFunc<object, object, object>(func);
fakeMethod.Invoke(ignored, ignored);
Assert.AreEqual(1, fakeMethod.NumberOfInvocations);
fakeMethod.Invoke(ignored, ignored);
Assert.AreEqual(2, fakeMethod.NumberOfInvocations);
fakeMethod.Invoke(ignored, ignored);
Assert.AreEqual(3, fakeMethod.NumberOfInvocations);
}