add url_utils to common repo from skia repo

py/utils/url_utils_test.py

+#!/usr/bin/python
+
+"""
+Copyright 2014 Google Inc.
+
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file.
+
+Test url_utils.py
+"""
+
+# System-level imports
+import os
+import shutil
+import tempfile
+import unittest
+import urllib
+
+# Imports from within Skia
+import url_utils
+
+
+class UrlUtilsTest(unittest.TestCase):
+
+  def test_create_filepath_url(self):
+    """Tests create_filepath_url(). """
+    with self.assertRaises(Exception):
+      url_utils.create_filepath_url('http://1.2.3.4/path')
+    # Pass absolute filepath.
+    self.assertEquals(
+        url_utils.create_filepath_url(
+            '%sdir%sfile' % (os.path.sep, os.path.sep)),
+        'file:///dir/file')
+    # Pass relative filepath.
+    self.assertEquals(
+        url_utils.create_filepath_url(os.path.join('dir', 'file')),
+        'file://%s/dir/file' % urllib.pathname2url(os.getcwd()))
+
+  def test_copy_contents(self):
+    """Tests copy_contents(). """
+    contents = 'these are the contents'
+    tempdir_path = tempfile.mkdtemp()
+    try:
+      source_path = os.path.join(tempdir_path, 'source')
+      source_url = url_utils.create_filepath_url(source_path)
+      with open(source_path, 'w') as source_handle:
+        source_handle.write(contents)
+      dest_path = os.path.join(tempdir_path, 'new_subdir', 'dest')
+      # Destination subdir does not exist, so copy_contents() should fail
+      # if create_subdirs_if_needed is False.
+      with self.assertRaises(Exception):
+        url_utils.copy_contents(source_url=source_url,
+                                dest_path=dest_path,
+                                create_subdirs_if_needed=False)
+      # If create_subdirs_if_needed is True, it should work.
+      url_utils.copy_contents(source_url=source_url,
+                              dest_path=dest_path,
+                              create_subdirs_if_needed=True)
+      self.assertEquals(open(dest_path).read(), contents)
+    finally:
+      shutil.rmtree(tempdir_path)