public void TestPhoneNumberAddMethod()
{
OOP_7.PhoneNumber phone_number1 = new OOP_7.PhoneNumber();
phone_number1.Init("Ленина", "Ленин", 100, 300);
OOP_7.PhoneNumber phone_number2 = new OOP_7.PhoneNumber();
phone_number2.Init("Сталина", "Сталин", 1000, 3000);
OOP_7.PhoneNumber phone_number3 = new OOP_7.PhoneNumber();
phone_number3.Init("Ленина", String.Concat(phone_number1._surname, " - ", phone_number2._surname), 1100, 3000);
OOP_7.PhoneNumber phone_number_test = phone_number1.Add(phone_number1, phone_number2);
Assert.AreEqual(phone_number3._address, phone_number_test._address);
Assert.AreEqual(phone_number3._surname, phone_number_test._surname);
Assert.AreEqual(phone_number3._payment, phone_number_test._payment);
Assert.AreEqual(phone_number3._credit, phone_number_test._credit);
phone_number2._credit = 50;
phone_number3._credit = 300;
phone_number_test = phone_number1.Add(phone_number1, phone_number2);
Assert.AreEqual(phone_number3._address, phone_number_test._address);
Assert.AreEqual(phone_number3._surname, phone_number_test._surname);
Assert.AreEqual(phone_number3._payment, phone_number_test._payment);
Assert.AreEqual(phone_number3._credit, phone_number_test._credit);
}
