public void IsEmpty()
{
string input = "";
List <char> output = new List <char>();
Assert.AreEqual(output, UniqueChar.UniqCharacters(input));
}
public void UpercaseLowercaseDifferent()
{
string input = "bAB";
List <char> output = new List <char>();
output.Add('a');
Assert.AreEqual(output, UniqueChar.UniqCharacters(input));
}
public void IsText()
{
string input = "bab";
List <char> output = new List <char>();
output.Add('a');
Assert.AreEqual(output, UniqueChar.UniqCharacters(input));
}