import os, filecmp, shutil, tempfile
import unittest
from test import test_support
class FileCompareTestCase(unittest.TestCase):
def setUp(self):
self.name = test_support.TESTFN
self.name_same = test_support.TESTFN + '-same'
self.name_diff = test_support.TESTFN + '-diff'
data = 'Contents of file go here.\n'
for name in [self.name, self.name_same, self.name_diff]:
output = open(name, 'w')
output.write(data)
output.close()
output = open(self.name_diff, 'a+')
output.write('An extra line.\n')
output.close()
self.dir = tempfile.gettempdir()
def tearDown(self):
os.unlink(self.name)
os.unlink(self.name_same)
os.unlink(self.name_diff)
def test_matching(self):
self.assertTrue(filecmp.cmp(self.name, self.name_same),
"Comparing file to itself fails")
self.assertTrue(filecmp.cmp(self.name, self.name_same, shallow=False),
"Comparing file to itself fails")
self.assertTrue(filecmp.cmp(self.name, self.name, shallow=False),
"Comparing file to identical file fails")
self.assertTrue(filecmp.cmp(self.name, self.name),
"Comparing file to identical file fails")
def test_different(self):
self.assertFalse(filecmp.cmp(self.name, self.name_diff),
"Mismatched files compare as equal")
self.assertFalse(filecmp.cmp(self.name, self.dir),
"File and directory compare as equal")
class DirCompareTestCase(unittest.TestCase):
def setUp(self):
tmpdir = tempfile.gettempdir()
self.dir = os.path.join(tmpdir, 'dir')
self.dir_same = os.path.join(tmpdir, 'dir-same')
self.dir_diff = os.path.join(tmpdir, 'dir-diff')
self.caseinsensitive = os.path.normcase('A') == os.path.normcase('a')
data = 'Contents of file go here.\n'
for dir in [self.dir, self.dir_same, self.dir_diff]:
shutil.rmtree(dir, True)
os.mkdir(dir)
if self.caseinsensitive and dir is self.dir_same:
fn = 'FiLe' # Verify case-insensitive comparison
else:
fn = 'file'
output = open(os.path.join(dir, fn), 'w')
output.write(data)
output.close()
output = open(os.path.join(self.dir_diff, 'file2'), 'w')
output.write('An extra file.\n')
output.close()
def tearDown(self):
shutil.rmtree(self.dir)
shutil.rmtree(self.dir_same)
shutil.rmtree(self.dir_diff)
def test_cmpfiles(self):
self.assertTrue(filecmp.cmpfiles(self.dir, self.dir, ['file']) ==
(['file'], [], []),
"Comparing directory to itself fails")
self.assertTrue(filecmp.cmpfiles(self.dir, self.dir_same, ['file']) ==
(['file'], [], []),
"Comparing directory to same fails")
# Try it with shallow=False
self.assertTrue(filecmp.cmpfiles(self.dir, self.dir, ['file'],
shallow=False) ==
(['file'], [], []),
"Comparing directory to itself fails")
self.assertTrue(filecmp.cmpfiles(self.dir, self.dir_same, ['file'],
shallow=False),
"Comparing directory to same fails")
# Add different file2
output = open(os.path.join(self.dir, 'file2'), 'w')
output.write('Different contents.\n')
output.close()
self.assertFalse(filecmp.cmpfiles(self.dir, self.dir_same,
['file', 'file2']) ==
(['file'], ['file2'], []),
"Comparing mismatched directories fails")
def test_dircmp(self):
# Check attributes for comparison of two identical directories
d = filecmp.dircmp(self.dir, self.dir_same)
if self.caseinsensitive:
self.assertEqual([d.left_list, d.right_list],[['file'], ['FiLe']])
else:
self.assertEqual([d.left_list, d.right_list],[['file'], ['file']])
self.assertTrue(d.common == ['file'])
self.assertTrue(d.left_only == d.right_only == [])
self.assertTrue(d.same_files == ['file'])
self.assertTrue(d.diff_files == [])
# Check attributes for comparison of two different directories
d = filecmp.dircmp(self.dir, self.dir_diff)
self.assertTrue(d.left_list == ['file'])
self.assertTrue(d.right_list == ['file', 'file2'])
self.assertTrue(d.common == ['file'])
self.assertTrue(d.left_only == [])
self.assertTrue(d.right_only == ['file2'])
self.assertTrue(d.same_files == ['file'])
self.assertTrue(d.diff_files == [])
# Add different file2
output = open(os.path.join(self.dir, 'file2'), 'w')
output.write('Different contents.\n')
output.close()
d = filecmp.dircmp(self.dir, self.dir_diff)
self.assertTrue(d.same_files == ['file'])
self.assertTrue(d.diff_files == ['file2'])
def test_main():
test_support.run_unittest(FileCompareTestCase, DirCompareTestCase)
if __name__ == "__main__":
test_main()