def test_recursiveDigitSum_0(): assert recursiveDigitSum(9999) == 36
def test_recursiveDigitSum_0(): assert recursiveDigitSum(1234) == 10
def test_recursiveDigitSum_3(): assert recursiveDigitSum(100000) == 1
def test_recursiveDigitSum_1(): for num in range(0, 10): assert recursiveDigitSum(num) == num
def test_recursiveDigitSum_2(): assert recursiveDigitSum(647) == 17