public void Push()
{
var causalities = new Stack<Causality>();
var sut = new CausalityStack(causalities);
sut.Push(new Port("x"));
Assert.AreEqual(1, causalities.Count);
Assert.AreEqual("x", causalities.Pop().Port.Fullname);
}
public void Pop()
{
var causalities = new Stack<Causality>();
causalities.Push(new Causality(new Port("x")));
var sut = new CausalityStack(causalities);
sut.Pop();
Assert.AreEqual(0, causalities.Count);
}
public void Peek()
{
var causalities = new Stack<Causality>();
causalities.Push(new Causality(new Port("x")));
causalities.Push(new Causality(new Port("y")));
var sut = new CausalityStack(causalities);
Assert.AreEqual("y", sut.Peek().Port.Fullname);
Assert.AreEqual(2, causalities.Count);
}
public void IsEmpty()
{
var causalities = new Stack<Causality>();
var sut = new CausalityStack(causalities);
Assert.IsTrue(sut.IsEmpty);
causalities.Push(new Causality(new Port("x")));
Assert.IsFalse(sut.IsEmpty);
}
public void Copy()
{
var causalities = new Stack<Causality>();
causalities.Push(new Causality(new Port("x")));
causalities.Push(new Causality(new Port("y")));
var sut = new CausalityStack(causalities);
var copyOfSut = sut.Copy();
Assert.AreNotSame(copyOfSut, sut);
Assert.AreEqual("y", copyOfSut.Peek().Port.Fullname);
copyOfSut.Pop();
Assert.AreEqual("x", copyOfSut.Peek().Port.Fullname);
copyOfSut.Pop();
Assert.IsTrue(copyOfSut.IsEmpty);
Assert.AreEqual(2, causalities.Count);
}