Lib/test/test_unicode_file.py

   1 # Test some Unicode file name semantics
   2 # We dont test many operations on files other than
   3 # that their names can be used with Unicode characters.
   4 import os, glob, time, shutil
   5 import unicodedata
   6
   7 import unittest
   8 from test.test_support import run_unittest, TESTFN_UNICODE
   9 from test.test_support import TESTFN_ENCODING, TESTFN_UNICODE_UNENCODEABLE
  10 try:
  11     TESTFN_ENCODED = TESTFN_UNICODE.encode(TESTFN_ENCODING)
  12 except (UnicodeError, TypeError):
  13     # Either the file system encoding is None, or the file name
  14     # cannot be encoded in the file system encoding.
  15     raise unittest.SkipTest("No Unicode filesystem semantics on this platform.")
  16
  17 if TESTFN_ENCODED.decode(TESTFN_ENCODING) != TESTFN_UNICODE:
  18     # The file system encoding does not support Latin-1
  19     # (which test_support assumes), so try the file system
  20     # encoding instead.
  21     import sys
  22     try:
  23         TESTFN_UNICODE = unicode("@test-\xe0\xf2", sys.getfilesystemencoding())
  24         TESTFN_ENCODED = TESTFN_UNICODE.encode(TESTFN_ENCODING)
  25         if '?' in TESTFN_ENCODED:
  26             # MBCS will not report the error properly
  27             raise UnicodeError, "mbcs encoding problem"
  28     except (UnicodeError, TypeError):
  29         raise unittest.SkipTest("Cannot find a suiteable filename.")
  30
  31 if TESTFN_ENCODED.decode(TESTFN_ENCODING) != TESTFN_UNICODE:
  32     raise unittest.SkipTest("Cannot find a suitable filename.")
  33
  34 def remove_if_exists(filename):
  35     if os.path.exists(filename):
  36         os.unlink(filename)
  37
  38 class TestUnicodeFiles(unittest.TestCase):
  39     # The 'do_' functions are the actual tests.  They generally assume the
  40     # file already exists etc.
  41
  42     # Do all the tests we can given only a single filename.  The file should
  43     # exist.
  44     def _do_single(self, filename):
  45         self.assertTrue(os.path.exists(filename))
  46         self.assertTrue(os.path.isfile(filename))
  47         self.assertTrue(os.access(filename, os.R_OK))
  48         self.assertTrue(os.path.exists(os.path.abspath(filename)))
  49         self.assertTrue(os.path.isfile(os.path.abspath(filename)))
  50         self.assertTrue(os.access(os.path.abspath(filename), os.R_OK))
  51         os.chmod(filename, 0777)
  52         os.utime(filename, None)
  53         os.utime(filename, (time.time(), time.time()))
  54         # Copy/rename etc tests using the same filename
  55         self._do_copyish(filename, filename)
  56         # Filename should appear in glob output
  57         self.assertTrue(
  58             os.path.abspath(filename)==os.path.abspath(glob.glob(filename)[0]))
  59         # basename should appear in listdir.
  60         path, base = os.path.split(os.path.abspath(filename))
  61         if isinstance(base, str):
  62             base = base.decode(TESTFN_ENCODING)
  63         file_list = os.listdir(path)
  64         # listdir() with a unicode arg may or may not return Unicode
  65         # objects, depending on the platform.
  66         if file_list and isinstance(file_list[0], str):
  67             file_list = [f.decode(TESTFN_ENCODING) for f in file_list]
  68
  69         # Normalize the unicode strings, as round-tripping the name via the OS
  70         # may return a different (but equivalent) value.
  71         base = unicodedata.normalize("NFD", base)
  72         file_list = [unicodedata.normalize("NFD", f) for f in file_list]
  73
  74         self.assertTrue(base in file_list)
  75
  76     # Do as many "equivalancy' tests as we can - ie, check that although we
  77     # have different types for the filename, they refer to the same file.
  78     def _do_equivalent(self, filename1, filename2):
  79         # Note we only check "filename1 against filename2" - we don't bother
  80         # checking "filename2 against 1", as we assume we are called again with
  81         # the args reversed.
  82         self.assertTrue(type(filename1)!=type(filename2),
  83                     "No point checking equivalent filenames of the same type")
  84         # stat and lstat should return the same results.
  85         self.assertEqual(os.stat(filename1),
  86                              os.stat(filename2))
  87         self.assertEqual(os.lstat(filename1),
  88                              os.lstat(filename2))
  89         # Copy/rename etc tests using equivalent filename
  90         self._do_copyish(filename1, filename2)
  91
  92     # Tests that copy, move, etc one file to another.
  93     def _do_copyish(self, filename1, filename2):
  94         # Should be able to rename the file using either name.
  95         self.assertTrue(os.path.isfile(filename1)) # must exist.
  96         os.rename(filename1, filename2 + ".new")
  97         self.assertTrue(os.path.isfile(filename1+".new"))
  98         os.rename(filename1 + ".new", filename2)
  99         self.assertTrue(os.path.isfile(filename2))
 100
 101         shutil.copy(filename1, filename2 + ".new")
 102         os.unlink(filename1 + ".new") # remove using equiv name.
 103         # And a couple of moves, one using each name.
 104         shutil.move(filename1, filename2 + ".new")
 105         self.assertTrue(not os.path.exists(filename2))
 106         shutil.move(filename1 + ".new", filename2)
 107         self.assertTrue(os.path.exists(filename1))
 108         # Note - due to the implementation of shutil.move,
 109         # it tries a rename first.  This only fails on Windows when on
 110         # different file systems - and this test can't ensure that.
 111         # So we test the shutil.copy2 function, which is the thing most
 112         # likely to fail.
 113         shutil.copy2(filename1, filename2 + ".new")
 114         os.unlink(filename1 + ".new")
 115
 116     def _do_directory(self, make_name, chdir_name, encoded):
 117         cwd = os.getcwd()
 118         if os.path.isdir(make_name):
 119             os.rmdir(make_name)
 120         os.mkdir(make_name)
 121         try:
 122             os.chdir(chdir_name)
 123             try:
 124                 if not encoded:
 125                     cwd_result = os.getcwdu()
 126                     name_result = make_name
 127                 else:
 128                     cwd_result = os.getcwd().decode(TESTFN_ENCODING)
 129                     name_result = make_name.decode(TESTFN_ENCODING)
 130
 131                 cwd_result = unicodedata.normalize("NFD", cwd_result)
 132                 name_result = unicodedata.normalize("NFD", name_result)
 133
 134                 self.assertEqual(os.path.basename(cwd_result),name_result)
 135             finally:
 136                 os.chdir(cwd)
 137         finally:
 138             os.rmdir(make_name)
 139
 140     # The '_test' functions 'entry points with params' - ie, what the
 141     # top-level 'test' functions would be if they could take params
 142     def _test_single(self, filename):
 143         remove_if_exists(filename)
 144         f = file(filename, "w")
 145         f.close()
 146         try:
 147             self._do_single(filename)
 148         finally:
 149             os.unlink(filename)
 150         self.assertTrue(not os.path.exists(filename))
 151         # and again with os.open.
 152         f = os.open(filename, os.O_CREAT)
 153         os.close(f)
 154         try:
 155             self._do_single(filename)
 156         finally:
 157             os.unlink(filename)
 158
 159     def _test_equivalent(self, filename1, filename2):
 160         remove_if_exists(filename1)
 161         self.assertTrue(not os.path.exists(filename2))
 162         f = file(filename1, "w")
 163         f.close()
 164         try:
 165             self._do_equivalent(filename1, filename2)
 166         finally:
 167             os.unlink(filename1)
 168
 169     # The 'test' functions are unittest entry points, and simply call our
 170     # _test functions with each of the filename combinations we wish to test
 171     def test_single_files(self):
 172         self._test_single(TESTFN_ENCODED)
 173         self._test_single(TESTFN_UNICODE)
 174         if TESTFN_UNICODE_UNENCODEABLE is not None:
 175             self._test_single(TESTFN_UNICODE_UNENCODEABLE)
 176
 177     def test_equivalent_files(self):
 178         self._test_equivalent(TESTFN_ENCODED, TESTFN_UNICODE)
 179         self._test_equivalent(TESTFN_UNICODE, TESTFN_ENCODED)
 180
 181     def test_directories(self):
 182         # For all 'equivalent' combinations:
 183         #  Make dir with encoded, chdir with unicode, checkdir with encoded
 184         #  (or unicode/encoded/unicode, etc
 185         ext = ".dir"
 186         self._do_directory(TESTFN_ENCODED+ext, TESTFN_ENCODED+ext, True)
 187         self._do_directory(TESTFN_ENCODED+ext, TESTFN_UNICODE+ext, True)
 188         self._do_directory(TESTFN_UNICODE+ext, TESTFN_ENCODED+ext, False)
 189         self._do_directory(TESTFN_UNICODE+ext, TESTFN_UNICODE+ext, False)
 190         # Our directory name that can't use a non-unicode name.
 191         if TESTFN_UNICODE_UNENCODEABLE is not None:
 192             self._do_directory(TESTFN_UNICODE_UNENCODEABLE+ext,
 193                                TESTFN_UNICODE_UNENCODEABLE+ext,
 194                                False)
 195
 196 def test_main():
 197     run_unittest(__name__)
 198
 199 if __name__ == "__main__":
 200     test_main()