Viewing file:  test_filecmp.py (8.69 KB) -rw-r--r--
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import filecmp
import os
import shutil
import tempfile
import unittest
from test import support
class FileCompareTestCase(unittest.TestCase):
def setUp(self):
self.name = support.TESTFN
self.name_same = support.TESTFN + '-same'
self.name_diff = support.TESTFN + '-diff'
data = 'Contents of file go here.\n'
for name in [self.name, self.name_same, self.name_diff]:
with open(name, 'w') as output:
output.write(data)
with open(self.name_diff, 'a+') as output:
output.write('An extra line.\n')
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),
"Comparing file to itself fails")
self.assertTrue(filecmp.cmp(self.name, self.name, shallow=False),
"Comparing file to itself fails")
self.assertTrue(filecmp.cmp(self.name, self.name_same),
"Comparing file to identical file fails")
self.assertTrue(filecmp.cmp(self.name, self.name_same, shallow=False),
"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")
def test_cache_clear(self):
first_compare = filecmp.cmp(self.name, self.name_same, shallow=False)
second_compare = filecmp.cmp(self.name, self.name_diff, shallow=False)
filecmp.clear_cache()
self.assertTrue(len(filecmp._cache) == 0,
"Cache not cleared after calling clear_cache")
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')
# Another dir is created under dir_same, but it has a name from the
# ignored list so it should not affect testing results.
self.dir_ignored = os.path.join(self.dir_same, '.hg')
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, self.dir_ignored):
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'
with open(os.path.join(dir, fn), 'w') as output:
output.write(data)
with open(os.path.join(self.dir_diff, 'file2'), 'w') as output:
output.write('An extra file.\n')
def tearDown(self):
for dir in (self.dir, self.dir_same, self.dir_diff):
shutil.rmtree(dir)
def test_default_ignores(self):
self.assertIn('.hg', filecmp.DEFAULT_IGNORES)
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
with open(os.path.join(self.dir, 'file2'), 'w') as output:
output.write('Different contents.\n')
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
left_dir, right_dir = self.dir, self.dir_same
d = filecmp.dircmp(left_dir, right_dir)
self.assertEqual(d.left, left_dir)
self.assertEqual(d.right, right_dir)
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.assertEqual(d.common, ['file'])
self.assertEqual(d.left_only, [])
self.assertEqual(d.right_only, [])
self.assertEqual(d.same_files, ['file'])
self.assertEqual(d.diff_files, [])
expected_report = [
"diff {} {}".format(self.dir, self.dir_same),
"Identical files : ['file']",
]
self._assert_report(d.report, expected_report)
# Check attributes for comparison of two different directories (right)
left_dir, right_dir = self.dir, self.dir_diff
d = filecmp.dircmp(left_dir, right_dir)
self.assertEqual(d.left, left_dir)
self.assertEqual(d.right, right_dir)
self.assertEqual(d.left_list, ['file'])
self.assertEqual(d.right_list, ['file', 'file2'])
self.assertEqual(d.common, ['file'])
self.assertEqual(d.left_only, [])
self.assertEqual(d.right_only, ['file2'])
self.assertEqual(d.same_files, ['file'])
self.assertEqual(d.diff_files, [])
expected_report = [
"diff {} {}".format(self.dir, self.dir_diff),
"Only in {} : ['file2']".format(self.dir_diff),
"Identical files : ['file']",
]
self._assert_report(d.report, expected_report)
# Check attributes for comparison of two different directories (left)
left_dir, right_dir = self.dir, self.dir_diff
shutil.move(
os.path.join(self.dir_diff, 'file2'),
os.path.join(self.dir, 'file2')
)
d = filecmp.dircmp(left_dir, right_dir)
self.assertEqual(d.left, left_dir)
self.assertEqual(d.right, right_dir)
self.assertEqual(d.left_list, ['file', 'file2'])
self.assertEqual(d.right_list, ['file'])
self.assertEqual(d.common, ['file'])
self.assertEqual(d.left_only, ['file2'])
self.assertEqual(d.right_only, [])
self.assertEqual(d.same_files, ['file'])
self.assertEqual(d.diff_files, [])
expected_report = [
"diff {} {}".format(self.dir, self.dir_diff),
"Only in {} : ['file2']".format(self.dir),
"Identical files : ['file']",
]
self._assert_report(d.report, expected_report)
# Add different file2
with open(os.path.join(self.dir_diff, 'file2'), 'w') as output:
output.write('Different contents.\n')
d = filecmp.dircmp(self.dir, self.dir_diff)
self.assertEqual(d.same_files, ['file'])
self.assertEqual(d.diff_files, ['file2'])
expected_report = [
"diff {} {}".format(self.dir, self.dir_diff),
"Identical files : ['file']",
"Differing files : ['file2']",
]
self._assert_report(d.report, expected_report)
def test_report_partial_closure(self):
left_dir, right_dir = self.dir, self.dir_same
d = filecmp.dircmp(left_dir, right_dir)
expected_report = [
"diff {} {}".format(self.dir, self.dir_same),
"Identical files : ['file']",
]
self._assert_report(d.report_partial_closure, expected_report)
def test_report_full_closure(self):
left_dir, right_dir = self.dir, self.dir_same
d = filecmp.dircmp(left_dir, right_dir)
expected_report = [
"diff {} {}".format(self.dir, self.dir_same),
"Identical files : ['file']",
]
self._assert_report(d.report_full_closure, expected_report)
def _assert_report(self, dircmp_report, expected_report_lines):
with support.captured_stdout() as stdout:
dircmp_report()
report_lines = stdout.getvalue().strip().split('\n')
self.assertEqual(report_lines, expected_report_lines)
def test_main():
support.run_unittest(FileCompareTestCase, DirCompareTestCase)
if __name__ == "__main__":
test_main()
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