def test_readme_quick_tutorial_pipeline(self, mypipe: Pipeline):
mypipe.register(double_even_item)
mypipe.register(add_one)
mypipe.register(DropEveryFifthItem())
result = mypipe.process([1, 2, 3, 4, 5, 6])
assert isinstance(result, types.GeneratorType)
assert list(result) == [2, 3, 3, 4, 5, 6, 7, 7]
def test_more_useful_handler(self, mypipe: Pipeline):
problem_items = []
def handler(stage, item, exc):
# array elements disappear if they are not copied
problem_items.append((exc, item[:]))
int_stage = mypipe.register(sum, group_size=2)
int_stage.exception(handler)
list(mypipe.process([1, 2, 3, '4', 5, 6]))
assert len(problem_items) == 1
assert isinstance(problem_items[0][0], TypeError)
assert problem_items[0][1] == [3, '4']
def test_more_useful_handler(self, mypipe: Pipeline):
problem_items = []
def handler(stage, item, exc):
problem_items.append((exc, item))
int_stage = mypipe.register(lambda val: int(val))
int_stage.exception(handler)
list(mypipe.process(['10', 5, 'hej', tuple, '2']))
assert len(problem_items) == 2
assert isinstance(problem_items[0][0], ValueError)
assert problem_items[0][1] == 'hej'
assert isinstance(problem_items[1][0], TypeError)
assert problem_items[1][1] == tuple
def test_drop_none_items(mypipe: Pipeline):
drop_even = lambda num: num if num % 2 == 1 else None
mypipe.register(drop_even)
result = mypipe.process([1, 2, 3, 4, 5])
assert list(result) == [1, 3, 5]
def test_can_ignore_errors(self, mypipe: Pipeline):
int_stage = mypipe.register(sum, group_size=2)
int_stage.exception(lambda *args: None)
result = mypipe.process([1, 2, 3, '4', 5, 6])
assert list(result) == [3, 11]
def test_can_ignore_errors(self, mypipe: Pipeline):
int_stage = mypipe.register(lambda val: int(val))
int_stage.exception(lambda *args: None)
result = mypipe.process(['10', 5, 'hej', tuple, '2'])
assert list(result) == [10, 5, 2]
def test_group_size_is_not_divisible_with_input_size(self, mypipe: Pipeline):
mypipe.register(sum, group_size=6)
result = mypipe.process([1, 2, 3, 4, 5, 6, 7])
assert list(result) == [21, 7]
def test_group_size_bigger_than_input_list(self, mypipe: Pipeline):
mypipe.register(sum, group_size=6)
result = mypipe.process([1, 2, 3, 4, 5])
assert list(result) == [15]
def test_register_method_with_group_option(self, mypipe: Pipeline):
mypipe.register(sum, group_size=2)
result = mypipe.process([1, 2, 3, 4])
assert list(result) == [3, 7]