public void Pop_WhenPoped_ShouldReturnTopElement()
{
// Arrange
var stack = new Stack<int>();
stack.Push(10);
stack.Push(30);
// Act
var result = stack.Pop();
// Assert
Assert.AreEqual(1, stack.Count, "There should be only single item.");
Assert.AreEqual(30, result, "Should return the top value.");
Assert.AreEqual(10, stack.GetBackingList().GetHeadAndTail().Item1.Value, "Head should point to 10");
}
public void Push_LastPushedItem_ShouldBeTheTop()
{
// Arrange
var stack = new Stack<int>();
// Act
stack.Push(10);
stack.Push(20);
stack.Push(30);
// Assert
Assert.AreEqual(3, stack.Count, "Should have 3 items in the stack.");
Assert.AreEqual(30, stack.GetBackingList().ElementAt(0), "First element.");
Assert.AreEqual(20, stack.GetBackingList().ElementAt(1), "Second element.");
Assert.AreEqual(10, stack.GetBackingList().ElementAt(2), "Third element.");
}
public void Push_ItemShouldBeAdded_ToTheStack()
{
// Arrange
var stack = new Stack<int>();
// Act
stack.Push(10);
// Assert
Assert.AreEqual(1, stack.Count, "There should be a single item in the list.");
Assert.AreEqual(10, stack.GetBackingList().GetHeadAndTail().Item1.Value, "Head should be 10.");
}
