def test_filter():
df = sn.filter(lambda x: x if x % 2 else None, sn.defer([1, 2, 3, 4, 5]))
for i, x in sn.enumerate(df, start=1):
assert 2 * i - 1 == x
# Alternative testing
assert [1, 3, 5] == list(sn.evaluate(df))
def test_filter(self):
df = sn.filter(lambda x: x if x % 2 else None,
make_deferrable([1, 2, 3, 4, 5]))
for i, x in sn.enumerate(df, start=1):
self.assertEqual(2 * i - 1, x)
# Alternative testing
self.assertEqual([1, 3, 5], list(evaluate(df)))