improved test

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9229 5f5364db-9458-4db8-a492-e30667be6df6
fix for children collection

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9230 5f5364db-9458-4db8-a492-e30667be6df6