def test_returns_int(self):
"""
Test list_odd to make sure it returns an int.
"""
return_type = type(count_odd(1))
self.assertEqual(
return_type, int, "count_odd should return type " +
"int, but instead returned type {}.".format(return_type))
return_type = type(count_odd([1]))
self.assertEqual(
return_type, int, "count_odd should return type " +
"int, but instead returned type {}.".format(return_type))
def test_count_odd(self, list_values, list_indices):
"""
Test the submitted count_odd against a randomly generated list.
"""
# Gather all of the odd values
expected = 0
for n in list_values:
if n % 2 == 1:
expected += 1
# Create up to 2 levels of nesting for the values in list_values, where
# the indices we turn into sublists are contained in
# nesting_indices_1 and nesting_indices_2
nesting_indices_1 = list_indices[:len(list_indices) // 2]
nesting_indices_2 = list_indices[len(list_indices) // 2:]
nesting_indices_1.sort()
nesting_indices_2.sort()
obj = create_nested_list(list_values,
[nesting_indices_1, nesting_indices_2])
# Ignoring the order of the values, in case students have an
# out-of-order version for some reason.
actual = count_odd(obj)
self.assertEqual(actual, expected,
("Using count_odd on {} returned" +
" {} instead of {}.").format(obj, actual, expected))
def test_one_nested_sublist(self):
"""
Test count_odd on a list with only one sublist in it.
"""
self.assertEqual(
count_odd([[3]]), 1, "count_odd should return " +
"the number of odd integers in nested sublists.")
def test_odd_integer(self):
"""
Test count_odd on an odd integer.
"""
self.assertEqual(
count_odd(3), 1,
"count_odd should return 1 " + "when given an odd integer.")
def test_even_integer(self):
"""
Test count_odd on an even integer.
"""
self.assertEqual(
count_odd(2), 0,
"count_odd should return 0 " + "when passed an even integer.")
def test_one_nested_sublist_and_integers(self):
"""
Test count_odd on a list with at most one level of nested sublists in
it mixed with integers.
"""
self.assertEqual(
count_odd([[3], 4,
[5]]), 2, "count_odd should return the number of odd " +
"integers in nested sublists and in the list passed " + "in.")