public void ShowNode_EmptyFilterSet_AlwaysReturnsTrue()
{
FilterCombinator<Boolean> combinator = new FilterCombinator<Boolean>();
Assert.AreEqual(0, combinator.Filters.Count, "Initial Filters count");
Assert.IsTrue(combinator.ShowNode(true), "Empty combinator should return true for ShowNode(true).");
Assert.IsTrue(combinator.ShowNode(false), "Empty combinator should return true for ShowNode(false).");
}
public void ShowNode_AndPredicate_ANDsFilterResults()
{
FilterCombinator<Boolean> combinator = new FilterCombinator<Boolean>();
combinator.Predicate = Functor.And;
Mock<Filter<Boolean>> filterA = new Mock<Filter<Boolean>>();
filterA.Setup(f => f.ShowNode(It.IsAny<Boolean>())).Returns(true);
combinator.Filters.Add(filterA.Object);
Mock<Filter<Boolean>> filterB = new Mock<Filter<Boolean>>();
filterB.Setup(f => f.ShowNode(It.IsAny<Boolean>())).Returns(false);
combinator.Filters.Add(filterB.Object);
Assert.IsFalse(combinator.ShowNode(true));
Assert.IsFalse(combinator.ShowNode(false));
filterA.Verify(f => f.ShowNode(It.IsAny<Boolean>()), Times.AtLeastOnce);
filterB.Verify(f => f.ShowNode(It.IsAny<Boolean>()), Times.AtLeastOnce);
}
