public void Peek_On_Stack_With_One_Element()
{
//Arrange
string elementInStack = "Test element";
Stack<string> newStack = new Stack<string>();
//Act
newStack.Push(elementInStack);
var topElementOfStack = newStack.Peek().elementValue;
//Assert
Assert.AreEqual(elementInStack, topElementOfStack);
}
public void Push_Two_Elements_To_Empty_Stack_Verify_That_Last_Added_Is_The_Top_Element_Of_Stack()
{
//Arrange
string firstElementToAdd = "First added element";
string secondElementToAdd = "Second added element";
Stack<string> newStack = new Stack<string>();
//Act
newStack.Push(firstElementToAdd);
newStack.Push(secondElementToAdd);
var topElement = newStack.Peek().elementValue;
//Assert
Assert.AreEqual(secondElementToAdd, topElement);
}
public void Pop_One_Element_When_Stack_Is_Not_Empty()
{
//Arrange
string firstElementToAdd = "First added element";
string secondElementToAdd = "Second added element";
Stack<string> newStack = new Stack<string>();
newStack.Push(firstElementToAdd);
newStack.Push(secondElementToAdd);
//Act
var popedElement = newStack.Pop().elementValue;
//Assert
Assert.AreEqual(popedElement, secondElementToAdd);
Assert.AreEqual(newStack.Peek().elementValue, FirstElementToAdd);
}
public void Throwing_An_Exception_When_Stack_Is_Empty()
{
//Arrange
Stack<string> newStack = new Stack<string>();
//Act
var topElementOfStack = newStack.Peek();
}