Clarify comments and code in webkitpy.common.find_files.

third_party/WebKit/Tools/Scripts/webkitpy/common/find_files_unittest.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 13 matching lines @@
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import sys
 import unittest
 
 from webkitpy.common import find_files
 from webkitpy.common.system.filesystem import FileSystem
+from webkitpy.common.system.filesystem_mock import MockFileSystem
 
 
 class MockWinFileSystem(object):
 
     def join(self, *paths):
         return '\\'.join(paths)
 
     def normpath(self, path):
         return path.replace('/', '\\')
 
 
 class TestWinNormalize(unittest.TestCase):
 
     def assert_filesystem_normalizes(self, filesystem):
-        self.assertEqual(find_files._normalize(filesystem, "c:\\foo",
-                                               ['fast/html', 'fast/canvas/*', 'compositing/foo.html']),
-                         ['c:\\foo\\fast\\html', 'c:\\foo\\fast\\canvas\\*', 'c:\\foo\\compositing\\foo.html'])
+        # pylint: disable=protected-access
+        self.assertEqual(
+            find_files._normalize(filesystem, 'c:\\foo', ['fast/html', 'fast/canvas/*', 'compositing/foo.html']),
+            ['c:\\foo\\fast\\html', 'c:\\foo\\fast\\canvas\\*', 'c:\\foo\\compositing\\foo.html'])
 
     def test_mocked_win(self):
         # This tests test_files.normalize, using portable behavior emulating
         # what we think Windows is supposed to do. This test will run on all
         # platforms.
         self.assert_filesystem_normalizes(MockWinFileSystem())
 
     def test_win(self):
         # This tests the actual windows platform, to ensure we get the same
         # results that we get in test_mocked_win().
         if sys.platform != 'win32':
             return
         self.assert_filesystem_normalizes(FileSystem())
+
+
+class TestFind(unittest.TestCase):
+
+    def test_basic(self):
+        filesystem = MockFileSystem({
+            '/base/a/1': '',
+            '/base/a/2': '',
+            '/base/b/1': '',
+            '/base/c/2': '',
+        })
+        self.assertEqual(list(find_files.find(filesystem, '/base/', ['a'])), ['/base/a/1', '/base/a/2'])
+        self.assertEqual(list(find_files.find(filesystem, '/base/', ['b', 'c'])), ['/base/b/1', '/base/c/2'])
+        self.assertEqual(list(find_files.find(filesystem, '/base/', ['*/1'])), ['/base/a/1', '/base/b/1'])