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"""Tests for distutils.file_util."""
import unittest
import os
import shutil
from distutils.file_util import move_file, write_file, copy_file
from distutils import log
from distutils.tests import support
from test.test_support import run_unittest
requires_os_link = unittest.skipUnless(hasattr(os, "link"),
"test requires os.link()")
class FileUtilTestCase(support.TempdirManager, unittest.TestCase):
def _log(self, msg, *args):
if len(args) > 0:
self._logs.append(msg % args)
else:
self._logs.append(msg)
def setUp(self):
super(FileUtilTestCase, self).setUp()
self._logs = []
self.old_log = log.info
log.info = self._log
tmp_dir = self.mkdtemp()
self.source = os.path.join(tmp_dir, 'f1')
self.target = os.path.join(tmp_dir, 'f2')
self.target_dir = os.path.join(tmp_dir, 'd1')
def tearDown(self):
log.info = self.old_log
super(FileUtilTestCase, self).tearDown()
def test_move_file_verbosity(self):
f = open(self.source, 'w')
try:
f.write('some content')
finally:
f.close()
move_file(self.source, self.target, verbose=0)
wanted = []
self.assertEqual(self._logs, wanted)
# back to original state
move_file(self.target, self.source, verbose=0)
move_file(self.source, self.target, verbose=1)
wanted = ['moving %s -> %s' % (self.source, self.target)]
self.assertEqual(self._logs, wanted)
# back to original state
move_file(self.target, self.source, verbose=0)
self._logs = []
# now the target is a dir
os.mkdir(self.target_dir)
move_file(self.source, self.target_dir, verbose=1)
wanted = ['moving %s -> %s' % (self.source, self.target_dir)]
self.assertEqual(self._logs, wanted)
def test_write_file(self):
lines = ['a', 'b', 'c']
dir = self.mkdtemp()
foo = os.path.join(dir, 'foo')
write_file(foo, lines)
content = [line.strip() for line in open(foo).readlines()]
self.assertEqual(content, lines)
def test_copy_file(self):
src_dir = self.mkdtemp()
foo = os.path.join(src_dir, 'foo')
write_file(foo, 'content')
dst_dir = self.mkdtemp()
copy_file(foo, dst_dir)
self.assertTrue(os.path.exists(os.path.join(dst_dir, 'foo')))
@requires_os_link
def test_copy_file_hard_link(self):
with open(self.source, 'w') as f:
f.write('some content')
st = os.stat(self.source)
copy_file(self.source, self.target, link='hard')
st2 = os.stat(self.source)
st3 = os.stat(self.target)
self.assertTrue(os.path.samestat(st, st2), (st, st2))
self.assertTrue(os.path.samestat(st2, st3), (st2, st3))
with open(self.source, 'r') as f:
self.assertEqual(f.read(), 'some content')
@requires_os_link
def test_copy_file_hard_link_failure(self):
# If hard linking fails, copy_file() falls back on copying file
# (some special filesystems don't support hard linking even under
# Unix, see issue #8876).
with open(self.source, 'w') as f:
f.write('some content')
st = os.stat(self.source)
def _os_link(*args):
raise OSError(0, "linking unsupported")
old_link = os.link
os.link = _os_link
try:
copy_file(self.source, self.target, link='hard')
finally:
os.link = old_link
st2 = os.stat(self.source)
st3 = os.stat(self.target)
self.assertTrue(os.path.samestat(st, st2), (st, st2))
self.assertFalse(os.path.samestat(st2, st3), (st2, st3))
for fn in (self.source, self.target):
with open(fn, 'r') as f:
self.assertEqual(f.read(), 'some content')
def test_suite():
return unittest.makeSuite(FileUtilTestCase)
if __name__ == "__main__":
run_unittest(test_suite())
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