public void QueueWithArray_Peek_should_throw_exception_when_queue_is_empty()
{
try
{
qu.Peek();
Assert.Fail();
}
catch (InvalidOperationException ex)
{
Assert.AreEqual("The queue is empty", ex.Message);
}
catch (Exception)
{
Assert.Fail();
}
}
public void Enqueue_WhenCalled_ShouldAddItemToBackOfQueue(int capacity, int range)
{
// Arrange
_queue = new QueueWithArray <int>(capacity);
// Act
for (var i = 1; i <= range; i++)
{
_queue.Enqueue(i);
}
// Assert
Assert.That(_queue.Peek(), Is.EqualTo(1));
Assert.That(_queue.Size, Is.EqualTo(range));
}
public void Peek_WhenQueueIsEmpty_ShouldThrowInvalidOperationException()
{
// Arrange & Act & Assert
Assert.Throws <InvalidOperationException>(() => _queue.Peek());
}