public void LetterCombinations_Case2()
{
// Arrange
var obj = new LetterCombinationsOfPhoneNumberProblem();
string digits = "";
var expected = new List <string>();
// Act
var actual = obj.LetterCombinations(digits);
// Assert
Assert.Equal(expected, actual);
}
public void LetterCombinations_Case1()
{
// Arrange
var obj = new LetterCombinationsOfPhoneNumberProblem();
string digits = "23";
var expected = new List <string>()
{
"ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"
};
// Act
var actual = obj.LetterCombinations(digits);
// Assert
Assert.Equal(expected, actual);
}
