public void ValidatesUnderflowCondition()
{
IStack <int> intStack = new SampleStack <int>();
var ex = Assert.Throws <InvalidOperationException>(() => intStack.Pop());
Assert.That(ex.Message, Is.EqualTo("Underflow!"));
}
public void ValidatesPoppedObjEqualsPushedObj(int value)
{
IStack <int> intStack = new SampleStack <int>();
intStack.Push(value);
Assert.AreEqual(value, intStack.Pop());
}
public void ValidatesizeAfterPop()
{
IStack <int> intStack = new SampleStack <int>();
intStack.Push(1);
intStack.Pop();
Assert.True(intStack.IsEmpty());
Assert.AreEqual(0, intStack.Size());
}
public void GivenStackWithLengthFive_Pop_TwoItems_LengthOfStackShouldBeThree()
{
//Arrange
var size = 5;
var sampleStack = new SampleStack(size);
sampleStack.Push(1);
sampleStack.Push(2);
sampleStack.Push(3);
sampleStack.Push(4);
sampleStack.Push(5);
//Act
sampleStack.Pop();
sampleStack.Pop();
//Assert
Assert.AreEqual(3, sampleStack.Count);
}
public void ValidatesPopElement()
{
IStack <int> intStack = new SampleStack <int>();
intStack.Push(1);
intStack.Push(3);
intStack.Push(2);
intStack.Pop();
Assert.AreEqual(2, intStack.Size());
}
public void GivenStackWithLengthZero_Pop_ShouldThrowIndexOutOfRangeException()
{
//Arrange
var size = 0;
var sampleStack = new SampleStack(size);
//Act
Action action = () => sampleStack.Pop();
//Assert
Assert.ThrowsException <IndexOutOfRangeException>(action);
}
public void ValidatesRemovedObjectsBackwards()
{
IStack <int> intStack = new SampleStack <int>();
int[] list = { 1, 3, 5 };
for (int i = 0; i < list.Length; ++i)
{
intStack.Push(list[i]);
}
for (int i = list.Length - 1; i >= 0; --i)
{
Assert.AreEqual(list[i], intStack.Pop());
}
}