public void InputTwoLettersReturnList()
{
var list = new LetterCombinationsOfPhoneNumber_17().LetterCombinations("23");
Assert.Equal(9, list.Count);
Assert.True(list.ContainsSameElement(new List <string>
{
"ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"
}));
}
public void InputEmptyStringReturnEmptyList()
{
var list = new LetterCombinationsOfPhoneNumber_17().LetterCombinations(string.Empty);
Assert.Equal(0, list.Count);
}
