public void Returns_True_When_Sellers_Are_Equal() { var aSeller = new Seller { ID = 1, FirstName = "Michał", LastName = "Rakel", BankName = "mBank", BankAccountNumber = "32 3245 5456 5435 3242 5456 1296 ", REGON = "df", CompanyName = "sdfds", NIP = "3234326576", Address = new Address { City = "Kraków", StreetAddress = "ul. Kredki 5/8a", ZipCode = "31-063" } }; var bSeller = new Seller { ID = 1, FirstName = "Michał", LastName = "Rakel", BankName = "mBank", BankAccountNumber = "32 3245 5456 5435 3242 5456 1296 ", REGON = "df", CompanyName = "sdfds", NIP = "3234326576", Address = new Address { City = "Kraków", StreetAddress = "ul. Kredki 5/8a", ZipCode = "31-063" } }; Assert.IsTrue(aSeller.Equals(bSeller)); }