public static void Main(string[] args)
{
Console.WriteLine("Please enter the number to check");
var numberString = Console.ReadLine() ?? string.Empty;
var number = int.Parse(numberString);
var happy = new HappyNumbersImpl().IsHappy(number);
Console.WriteLine($"Happy? {happy}");
Console.ReadLine();
}
public void TestCases(int number, bool expectedHappyness)
{
var isHappy = new HappyNumbersImpl().IsHappy(number);
Assert.Equal(isHappy, expectedHappyness);
}