public void DoesPeekRetrieveTopWhenStackIsNotEmpty()
{
LinkedListTypedStack stack = new LinkedListTypedStack();
stack.Push(1);
stack.Push(2);
int expected = 2;
int actual = ((Node)stack.Peek()).Data;
Assert.AreEqual(expected, actual);
int expected_size = 2;
int actual_size = stack.Size;
Assert.AreEqual(expected_size, actual_size);
}
public void DoesPushAddElementIntoStackWhenStackIsNotEmpty()
{
LinkedListTypedStack stack = new LinkedListTypedStack();
stack.Push(1);
stack.Push(2);
string expected = "2 1 ";
string actual = stack.DisplayElements();
Assert.AreEqual(expected, actual);
int expected_top_val = 2;
int actual_top_val = ((Node)stack.Top).Data;
Assert.AreEqual(expected_top_val, actual_top_val);
}
public void DoesIsEmptyReturnsFaleWhenStackIsNotEmpty() // Depends on push() method
{
LinkedListTypedStack stack = new LinkedListTypedStack();
stack.Push(1);
bool expected = false;
bool actual = stack.IsEmpty();
Assert.AreEqual(expected, actual);
}
public void DoesPopMethodRetrieveTopWhenStackHasOnlyOneElement()
{
LinkedListTypedStack stack = new LinkedListTypedStack();
stack.Push(1);
int expected = 1;
int actual = ((Node)stack.Pop()).Data;
Assert.AreEqual(expected, actual);
Assert.AreEqual(true, stack.IsEmpty());
Assert.IsNull(stack.Top);
}
public void DoesPeekRetrieveTopWhenStackHasOnlyOneElement()
{
LinkedListTypedStack stack = new LinkedListTypedStack();
stack.Push(1);
int expected = 1;
int actual = ((Node)stack.Peek()).Data;
Assert.AreEqual(expected, actual);
int expected_size = 1;
int actual_size = stack.Size;
Assert.AreEqual(expected_size, actual_size);
}
