Issue 4880 - Change create nightlies test_copy_repository to use set

sitescripts/extensions/test/test_createNightlies.py

 # This file is part of the Adblock Plus web scripts,
 # Copyright (C) 2006-2016 Eyeo GmbH
 #
 # Adblock Plus is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 3 as
 # published by the Free Software Foundation.
 #
 # Adblock Plus is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ skipping 37 matching lines @@
 
 
 def test_current_revision(nightlybuild):
     # The hash is the commit that the safari bookmark points to.
     # (see adblockplusnightly.bookmark in test/data/bookmarks)
     assert nightlybuild.revision == '1291590ddd0f'
 
 
 def test_copy_repository(nightlybuild, nightlydir):
     nightlybuild.copyRepository()
-    assert os.listdir(nightlybuild.tempdir) == ['.hg', 'README.txt']
+    files = os.listdir(nightlybuild.tempdir)
+    assert set(files) == {'.hg', 'README.txt'}
 
 
 def test_get_changes(nightlybuild, nightlydir):
     # The bookmark 'safari' contains only 2 revisions
     # default contains 51 so here we ensure that erroneous changes
     # are not returned
     for change in nightlybuild.getChanges():
         assert change['revision'] < '2'
 
     nightlybuild.config.revision = 'default'
     for change in nightlybuild.getChanges():
         assert change['revision'] > '1'
 
 
 def test_missing_bookmark(config):
     config.revision = 'foo'
     config.type = 'type'
     try:
         createNightlies.NightlyBuild(config)
     except CalledProcessError as e:
         assert e.returncode == 255