public void ReturnCorrectMessage_WithCorrectProperties()
{
// Arrange
var mockStaff = new Mock <IStaff>();
var mockKnife = new Mock <IKnife>();
var mage = new Mage(mockStaff.Object, mockKnife.Object);
var expected = $"Special Attack: CastSpell, Mana: {mage.SpecialEnergy}, Intelligence: {mage.Intelligence}";
// Act & Assert
Assert.AreEqual(expected, mage.Additionalinfo());
}