# Copyright 2015 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import os.path
import shutil
import tempfile
import unittest

from mojom import fileutil

class FileUtilTest(unittest.TestCase):
  def testEnsureDirectoryExists(self):
    """Test that EnsureDirectoryExists functions correctly."""

    temp_dir = tempfile.mkdtemp()
    try:
      self.assertTrue(os.path.exists(temp_dir))

      # Directory does not exist, yet.
      full = os.path.join(temp_dir, "foo", "bar")
      self.assertFalse(os.path.exists(full))

      # Create the directory.
      fileutil.EnsureDirectoryExists(full)
      self.assertTrue(os.path.exists(full))

      # Trying to create it again does not cause an error.
      fileutil.EnsureDirectoryExists(full)
      self.assertTrue(os.path.exists(full))

      # Bypass check for directory existence to tickle error handling that
      # occurs in response to a race.
      fileutil.EnsureDirectoryExists(full, always_try_to_create=True)
      self.assertTrue(os.path.exists(full))
    finally:
      shutil.rmtree(temp_dir)