Rewrites assertions.

git-svn-id: http://svn.redmine.org/redmine/trunk@13776 e93f8b46-1217-0410-a6f0-8f06a7374b81
Make sure that themes are reloaded after test.

git-svn-id: http://svn.redmine.org/redmine/trunk@13777 e93f8b46-1217-0410-a6f0-8f06a7374b81