public void Count_OnEmptyStack_ReturnsZero()
{
//Near-arbitrary stack size for the creation of the stack:
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
int expected = 0;
int actual = target.Count();
Assert.AreEqual(expected, actual);
}
public void Count_OnStackWithItems_ReturnsTwo()
{
//Near-arbitrary stack size for the creation of the stack:
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
//Push stub data
target.Push("a");
target.Push("a");
int expected = 2;
int actual = target.Count();
Assert.AreEqual(expected, actual);
}
public void Count_OnFilledThenEmptiedStack_ReturnsOne()
{
//Assemble
int stackTestSize = 3;
Stack target = new Stack(stackTestSize);
//Act
target.Push("A");
target.Push("B");
//Pop all but one item from the stack.
target.Pop();
//Verify that count has returned value of 1.
int expected = 1;
int actual = target.Count();
//Assert
Assert.AreEqual(expected, actual);
}
public void Count_OnFilledMinusOneStack_ReturnsFour()
{
//Assemble
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
//Act
target.Push("A");
target.Push("B");
target.Push("C");
target.Push("D");
target.Push("E");
//Pop the last item from the stack.
target.Pop();
//Verify that count has returned value of 4.
int expected = 4;
int actual = target.Count();
//Assert
Assert.AreEqual(expected, actual);
}
public void IsEmpty_EmptyStackBlankString_ReturnsTrue()
{
//Near-arbitrary stack size for the creation of the stack:
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
//Add item to stack
target.Push("TestItem");
//Pop from stack
target.Pop();
bool expected = true;
bool actual = target.IsEmpty();
Assert.AreEqual(expected, actual);
}
public void Push_OnFullArray_ReturnsExceptionHandler()
{
//Set stack size low for easy testing.
int stackTestSize = 2;
Stack target = new Stack(stackTestSize);
//Push stub data
target.Push("a");
target.Push("a");
//This push will overflow the array and throw an exception.
target.Push("a");
}
public void Pop_OnStackWithOneItem_ReturnsCorrectFeedback()
{
//Assemble
int stackTestSize = 1;
Stack target = new Stack(stackTestSize);
//Act
target.Push("A");
//Verify that pop has given the correct user-friendly feedback.
string expected = "A";
string actual = target.Pop();
//Assert
Assert.AreEqual(expected, actual);
}
public void Pop_OnStackThatUsedToHaveItems_Returns()
{
//Assemble
int stackTestSize = 3;
Stack target = new Stack(stackTestSize);
//Act
target.Push("A");
target.Push("B");
target.Push("C");
target.Pop();
target.Pop();
//Verify that an array can be filled and then all elements can be popped from it.
string expected = "A";
string actual = target.Pop();
//Assert
Assert.AreEqual(expected, actual);
}
public void Pop_OnEmptyStack_ReturnsExceptionHandler()
{
//Near-arbitrary stack size for the creation of the stack:
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
//Attempt to pop an empty stack - will return outofrange exception with a message.
target.Pop();
}
public void Peek_OnStackWithItems_ReturnsLastAdded()
{
//Near-arbitrary stack size for the creation of the stack:
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
//Push stub data to stack
target.Push("A");
target.Push("B");
target.Push("C");
string expected = "C";
string actual = target.Peek();
Assert.AreEqual(expected, actual);
}
public void Peek_OnFullStackArray_ReturnCorrectItem()
{
//Assemble
int stackTestSize = 2;
Stack target = new Stack(stackTestSize);
//Act
target.Push("a");
target.Push("B");
string expected = target.Peek();
string actual = "B";
//Assert
Assert.AreEqual(expected, actual);
}
public void Peek_OnFilledThenEmptiedStack_ReturnCorrectItem()
{
//Assemble
int stackTestSize = 3;
Stack target = new Stack(stackTestSize);
//Act
target.Push("A");
target.Push("B");
target.Push("C");
//Pop all but one item from the stack.
target.Pop();
target.Pop();
string expected = target.Peek();
string actual = "A";
//Assert
Assert.AreEqual(expected, actual);
}
public void Peek_OnEmptyStack_ReturnsExceptionHandler()
{
//Near-arbitrary stack size for the creation of the stack:
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
//Peek on an empty stack - will throw an exception in the test.
target.Peek();
}
public void IsEmpty_OnStackWithItems_ReturnsFalse()
{
//Assemble
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
//Act
target.Push("A");
bool expected = false;
bool actual = target.IsEmpty();
//Assert
Assert.AreEqual(expected, actual);
}
public void IsEmpty_EmptyStackNull_ReturnsTrue()
{
//Near-arbitrary stack size for the creation of the stack:
int stackTestSize = 5;
Stack target = new Stack(stackTestSize);
bool expected = true;
bool actual = target.IsEmpty();
Assert.AreEqual(expected, actual);
}