public int GetPunctuationCountRecursive_ParameterIsValid_ReturnsCharsCount(string str)
{
// Act
return(WhileMethods.GetPunctuationCountRecursive(str));
}
public void GetPunctuationCountRecursive_StrIsNull_ThrowsException()
{
// Act
Assert.Throws <ArgumentNullException>(() => WhileMethods.GetPunctuationCountRecursive(null));
}