public void TestHasEmailOrMobile()
{
Customer c1 = new Customer();
c1.PhoneNumber = "0412312869";
Customer c2 = new Customer();
c2.PhoneNumber = "412312869";
c2.EmailAddress = "*****@*****.**";
Customer c3 = new Customer();
c3.PhoneNumber = "0260253606";
c3.EmailAddress = "*****@*****.**";
Customer c4 = new Customer();
c4.PhoneNumber = "0260253606";
Assert.IsTrue(c1.HasEmailOrMobile(), "Mobile only, should be true");
Assert.IsTrue(c2.HasEmailOrMobile(), "Mobile + email, should be true");
Assert.IsTrue(c3.HasEmailOrMobile(), "Email only, should be true");
Assert.IsFalse(c4.HasEmailOrMobile(), "Neither, should be false");
}
