public static void ClearWorksCorrectly()
{
// Arrange
var q = new StackBasedQueue <int>();
q.Enqueue(1);
q.Enqueue(2);
// Act
q.Clear();
// Assert
Assert.IsTrue(q.IsEmpty(), "Queue is empty");
Assert.IsFalse(q.IsFull(), "Queue is full");
}
public static void PeekEmptyQueueThrowsInvalidOperationException()
{
// Arrange
var q = new StackBasedQueue <int>();
Exception?exception = null;
// Act
try
{
q.Peek();
}
catch (Exception ex)
{
exception = ex;
}
// Assert
Assert.AreEqual(typeof(InvalidOperationException), exception?.GetType());
}
public static void DequeueEmptyQueueThrowsInvalidOperationException()
{
// Arrange
var q = new StackBasedQueue <int>();
Exception?exception = null;
// Act
try
{
q.Dequeue();
}
catch (Exception ex)
{
exception = ex;
}
// Assert
Assert.AreEqual(expected: typeof(InvalidOperationException), actual: exception?.GetType());
}
public static void PeekWorksCorrectly()
{
// Arrange
var q = new StackBasedQueue <int>();
q.Enqueue(1);
q.Enqueue(2);
var peeked = 0;
// Act
for (var i = 0; i < 3; i++)
{
peeked = q.Peek();
}
// Assert
Assert.AreEqual(1, peeked);
Assert.IsFalse(q.IsEmpty(), "Queue is empty");
Assert.IsFalse(q.IsFull(), "Queue is full");
}
public static void DequeueWorksCorrectly()
{
// Arrange
var q = new StackBasedQueue <char>();
q.Enqueue('A');
q.Enqueue('B');
q.Enqueue('C');
var result = new StringBuilder();
// Act
for (var i = 0; i < 3; i++)
{
result.Append(q.Dequeue());
}
// Assert
Assert.AreEqual("ABC", result.ToString());
Assert.IsTrue(q.IsEmpty(), "Queue is empty");
Assert.IsFalse(q.IsFull(), "Queue is full");
}