@Test
public void should_return_2a0b_give_two_number_are_correct() {
GuessNumber guessNumber = new GuessNumber("1234");
String result = guessNumber.validate("1256");
assertEquals("2a0b", result);
}
@Test
public void should_return_4a0b_given_all_digits_is_correct() {
GuessNumber guessNumber = new GuessNumber("1234");
String result = guessNumber.validate("1234");
assertEquals("4a0b", result);
}
@Test
public void should_return_3a0b_given_partial_digits_are_correct() {
GuessNumber guessNumber = new GuessNumber("1234");
String result = guessNumber.validate("1235");
assertEquals("3a0b", result);
}