def testTupleOnTheLeftMostSideWorkLikeProducers(self):
from useless.pipes.common import from_list, echo, unique
# using 'literal' iterables
self.assertEqual(([1, 2], [3, 4]) | echo | list, [(1, 3), (2, 4)])
# using useless.pipess: a worker and a producer
self.assertEqual(([1, 2] | unique, from_list([3, 4])) | echo | list, [(1, 3), (2, 4)])
#'literal' values repeat
self.assertEqual(("foo", [1, 2]) | echo | list, [("foo", 1), ("foo", 2)])
def testALiteralValueJustRepeats(self):
from useless.pipes.common import from_list, echo
self.assertEqual(from_list([1, 2]) | ("foo", echo) | list, [("foo", 1), ("foo", 2)])
def testAutomaticallyAddLastGeneratorToEachLeftEnd(self):
from useless.pipes.common import from_list, echo, unique
self.assertEqual(from_list([1, 3]) | (echo,) | list, [(1,), (3,)])
self.assertEqual(from_list([1, 2]) | (echo, echo) | list, [(1, 1), (2, 2)])