public void When_Single_word_Then_char_array()
{
Assert.AreEqual(new List <string>()
{
"a", "b", "c"
}, LetterCombinationsOfAPhoneNumber.LetterCombinations("2"));
}
public void LetterCombinations(string digits, string[] expected)
{
var sut = new LetterCombinationsOfAPhoneNumber();
var actual = sut.LetterCombinations(digits);
Assert.AreEqual(expected, actual.ToArray());
}
public void When_23_Then_combination_array()
{
var expect = new List <string>()
{
"ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"
};
var result = LetterCombinationsOfAPhoneNumber.LetterCombinations("23");
Assert.IsTrue(expect.Count == result.Count);
Assert.IsTrue(expect.Any(q => result.Contains(q)));
}
