def test_merge(from_line):
requirements = [
from_line('flask==1'),
from_line('flask==1'),
from_line('django==2')
]
assert Counter(requirements[1:3]) == Counter(
merge(requirements, ignore_conflicts=True))
def test_merge_detect_conflicts(from_line):
requirements = [from_line('flask==1'), from_line('flask==2')]
with pytest.raises(IncompatibleRequirements):
merge(requirements, ignore_conflicts=False)