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      1 """Tests for distutils.dep_util."""
      2 import unittest
      3 import os
      4 import time
      5 
      6 from distutils.dep_util import newer, newer_pairwise, newer_group
      7 from distutils.errors import DistutilsFileError
      8 from distutils.tests import support
      9 from test.test_support import run_unittest
     10 
     11 class DepUtilTestCase(support.TempdirManager, unittest.TestCase):
     12 
     13     def test_newer(self):
     14 
     15         tmpdir = self.mkdtemp()
     16         new_file = os.path.join(tmpdir, 'new')
     17         old_file = os.path.abspath(__file__)
     18 
     19         # Raise DistutilsFileError if 'new_file' does not exist.
     20         self.assertRaises(DistutilsFileError, newer, new_file, old_file)
     21 
     22         # Return true if 'new_file' exists and is more recently modified than
     23         # 'old_file', or if 'new_file' exists and 'old_file' doesn't.
     24         self.write_file(new_file)
     25         self.assertTrue(newer(new_file, 'I_dont_exist'))
     26         self.assertTrue(newer(new_file, old_file))
     27 
     28         # Return false if both exist and 'old_file' is the same age or younger
     29         # than 'new_file'.
     30         self.assertFalse(newer(old_file, new_file))
     31 
     32     def test_newer_pairwise(self):
     33         tmpdir = self.mkdtemp()
     34         sources = os.path.join(tmpdir, 'sources')
     35         targets = os.path.join(tmpdir, 'targets')
     36         os.mkdir(sources)
     37         os.mkdir(targets)
     38         one = os.path.join(sources, 'one')
     39         two = os.path.join(sources, 'two')
     40         three = os.path.abspath(__file__)    # I am the old file
     41         four = os.path.join(targets, 'four')
     42         self.write_file(one)
     43         self.write_file(two)
     44         self.write_file(four)
     45 
     46         self.assertEqual(newer_pairwise([one, two], [three, four]),
     47                          ([one],[three]))
     48 
     49     def test_newer_group(self):
     50         tmpdir = self.mkdtemp()
     51         sources = os.path.join(tmpdir, 'sources')
     52         os.mkdir(sources)
     53         one = os.path.join(sources, 'one')
     54         two = os.path.join(sources, 'two')
     55         three = os.path.join(sources, 'three')
     56         old_file = os.path.abspath(__file__)
     57 
     58         # return true if 'old_file' is out-of-date with respect to any file
     59         # listed in 'sources'.
     60         self.write_file(one)
     61         self.write_file(two)
     62         self.write_file(three)
     63         self.assertTrue(newer_group([one, two, three], old_file))
     64         self.assertFalse(newer_group([one, two, old_file], three))
     65 
     66         # missing handling
     67         os.remove(one)
     68         self.assertRaises(OSError, newer_group, [one, two, old_file], three)
     69 
     70         self.assertFalse(newer_group([one, two, old_file], three,
     71                                      missing='ignore'))
     72 
     73         self.assertTrue(newer_group([one, two, old_file], three,
     74                                     missing='newer'))
     75 
     76 
     77 def test_suite():
     78     return unittest.makeSuite(DepUtilTestCase)
     79 
     80 if __name__ == "__main__":
     81     run_unittest(test_suite())
     82