public void AddSuccessor_SuccessorAddedTwice_SecondSuccessorNotAddedToSuccessors()
{
// arrange
ConcreteNode testNode = new ConcreteNode(0, 0, "testNode");
StubNode successor = new StubNode();
// act
testNode.AddSuccessor(successor);
testNode.AddSuccessor(successor);
// assert
Assert.AreEqual(1, testNode.Successors.Where(pred => pred.Equals(successor)).Count());
}
public void AddSuccessor_AddedSuccessorNull_ThrowsArgumentNullException()
{
// arrange
ConcreteNode testNode = new ConcreteNode(0, 0, "testNode");
// act
testNode.AddSuccessor(null);
}
public void AddSuccessor_SuccessorAddedFirstTime_SuccessorAddedToSuccessors()
{
// arrange
ConcreteNode testNode = new ConcreteNode(0, 0, "testNode");
StubNode successor = new StubNode();
// act
testNode.AddSuccessor(successor);
// assert
Assert.IsTrue(testNode.Successors.Contains(successor));
}