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from setuptools.dep_util import newer_pairwise_group
import os
import pytest
@pytest.fixture
def groups_target(tmpdir):
"""Sets up some older sources, a target and newer sources.
Returns a 3-tuple in this order.
"""
creation_order = ['older.c', 'older.h', 'target.o', 'newer.c', 'newer.h']
mtime = 0
for i in range(len(creation_order)):
creation_order[i] = os.path.join(str(tmpdir), creation_order[i])
with open(creation_order[i], 'w'):
pass
# make sure modification times are sequential
os.utime(creation_order[i], (mtime, mtime))
mtime += 1
return creation_order[:2], creation_order[2], creation_order[3:]
def test_newer_pairwise_group(groups_target):
older = newer_pairwise_group([groups_target[0]], [groups_target[1]])
newer = newer_pairwise_group([groups_target[2]], [groups_target[1]])
assert older == ([], [])
assert newer == ([groups_target[2]], [groups_target[1]])
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