chrome/test/pyautolib/pyauto_utils_test.py

   1 #!/usr/bin/env python
   2 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """Tests for pyauto_utils."""
   7
   8 import glob
   9 import os
  10 import shutil
  11 import tempfile
  12 import unittest
  13
  14 import pyauto_utils
  15
  16
  17 class ExistingPathReplacerTest(unittest.TestCase):
  18   """Tests for ExistingPathReplacer."""
  19
  20   def setUp(self):
  21     self._workdir = tempfile.mkdtemp()
  22     self.assertEqual(0, len(os.listdir(self._workdir)))
  23
  24   def tearDown(self):
  25     shutil.rmtree(self._workdir, ignore_errors=True)
  26
  27   def _CreateFile(self, path):
  28     fp = open(path, 'w')
  29     fp.write('magic')
  30     fp.close()
  31
  32   def _IsOrigFile(self, path):
  33     if not os.path.isfile(path):
  34       return False
  35     return open(path).read() == 'magic'
  36
  37   def testNonExistingFile(self):
  38     """Test when the requested file does not exist."""
  39     myfile = os.path.join(self._workdir, 'myfile.txt')
  40     self.assertFalse(os.path.isfile(myfile))
  41     r = pyauto_utils.ExistingPathReplacer(myfile, path_type='file')
  42     self.assertTrue(os.path.isfile(myfile))
  43     del r
  44     self.assertEqual(0, len(os.listdir(self._workdir)))
  45
  46   def testExistingFile(self):
  47     """Test when the requested file exists."""
  48     myfile = os.path.join(self._workdir, 'myfile.txt')
  49     self._CreateFile(myfile)
  50     self.assertTrue(self._IsOrigFile(myfile))
  51     r = pyauto_utils.ExistingPathReplacer(myfile, path_type='file')
  52     self.assertFalse(self._IsOrigFile(myfile))
  53     self.assertEqual(2, len(os.listdir(self._workdir)))
  54     del r
  55     self.assertEqual(1, len(os.listdir(self._workdir)))
  56     self.assertTrue(self._IsOrigFile(myfile))
  57
  58   def testNonExistingDir(self):
  59     """Test when the requested dir does not exist."""
  60     mydir = os.path.join(self._workdir, 'mydir')
  61     self.assertFalse(os.path.isdir(mydir))
  62     r = pyauto_utils.ExistingPathReplacer(mydir, path_type='dir')
  63     self.assertTrue(os.path.isdir(mydir))
  64     self.assertEqual(0, len(os.listdir(mydir)))
  65     del r
  66     self.assertFalse(os.path.isdir(mydir))
  67
  68   def testExistingDir(self):
  69     """Test when the requested dir exists."""
  70     # Create a dir with one file
  71     mydir = os.path.join(self._workdir, 'mydir')
  72     os.makedirs(mydir)
  73     self.assertEqual(1, len(os.listdir(self._workdir)))
  74     myfile = os.path.join(mydir, 'myfile.txt')
  75     open(myfile, 'w').close()
  76     self.assertTrue(os.path.isfile(myfile))
  77     r = pyauto_utils.ExistingPathReplacer(mydir)
  78     self.assertEqual(2, len(os.listdir(self._workdir)))
  79     self.assertFalse(os.path.isfile(myfile))
  80     del r
  81     self.assertEqual(1, len(os.listdir(self._workdir)))
  82     self.assertTrue(os.path.isfile(myfile))
  83
  84
  85 if __name__ == '__main__':
  86   unittest.main()