public void TestCall()
{
AbstractFactory samsung = new SamsungFactory();
IPhone phone = samsung.createPhone();
IPhablet phablet = samsung.createPhablet();
SoundPlayer sp = new SoundPlayer();
Assert.AreSame(phone.Call().GetType(), sp.GetType());
Assert.AreSame(phablet.Call().GetType(), sp.GetType());
AbstractFactory nokia = new SamsungFactory();
IPhone nokiaphone = nokia.createPhone();
IPhablet nokiaphablet = nokia.createPhablet();
Assert.AreSame(nokiaphone.Call().GetType(), sp.GetType());
Assert.AreSame(nokiaphablet.Call().GetType(), sp.GetType());
AbstractFactory apple = new SamsungFactory();
IPhone applephone = apple.createPhone();
IPhablet applephablet = apple.createPhablet();
Assert.AreSame(applephone.Call().GetType(), sp.GetType());
Assert.AreSame(applephablet.Call().GetType(), sp.GetType());
}