def test_calculated_superdigit_for_numbers(self):
# given numbers with pre-calculated super digits
numbers = [
dict(number=10, superdigit=1),
dict(number=99, superdigit=9),
dict(number=999, superdigit=9),
dict(number=88, superdigit=7),
dict(number=532, superdigit=1),
dict(number=4567, superdigit=4),
dict(number=98741, superdigit=2),
dict(number=-10, superdigit=-1),
dict(number=-99, superdigit=-9),
dict(number=-999, superdigit=-9),
dict(number=-88, superdigit=-7),
dict(number=-532, superdigit=-1),
dict(number=-4567, superdigit=-4),
dict(number=-98741, superdigit=-2),
]
# when super digit is calculated for every given number
calculated = itertools.imap(
lambda given: (given['superdigit'], superdigit.calc(given['number'])),
numbers,
)
# then calculated superdigit is equal a given calculated by hand
for given_superdigit, calc_superdigit in calculated:
self.assertEqual(given_superdigit, calc_superdigit)
def test_every_negative_single_digit_has_equal_negative_superdigit(self):
# given single digits
single_digits = [digit for digit in xrange(-9, -1)]
# when super digit is calculated for every single digit
calculated = itertools.imap(
lambda d: (d, superdigit.calc(d)),
single_digits,
)
# then every single digit is the super digit as well
for digit, calc_superdigit in calculated:
self.assertEqual(digit, calc_superdigit)
def test_calculate_superdigit_for_max_positive_ends_with_calculated_superdigit(self):
# when superdigit is calculated for max positive number
superdigit.calc(sys.maxint)
# then superdigit is calculated without error
pass