public void Set_number_and_send_a_digit()
 {
     var sut = new NumberAssembler();
     sut.Number = 23;
     Assert.AreEqual(9, sut.Add_digit("9"));
 }
 public void Set_number_and_read_it()
 {
     var sut = new NumberAssembler();
     sut.Number = 23;
     Assert.AreEqual(23, sut.Number);
 }
 public void Next_digit_is_added_to_number()
 {
     var sut = new NumberAssembler();
     sut.Add_digit("2");
     Assert.AreEqual(23, sut.Add_digit("3"));
 }
 public void Read_number()
 {
     var sut = new NumberAssembler();
     sut.Add_digit("2");
     Assert.AreEqual(2, sut.Number);
 }
 public void First_digit_is_returned_as_number()
 {
     var sut = new NumberAssembler();
     Assert.AreEqual(2, sut.Add_digit("2"));
 }