Test http://www.w3.org/2001/DOM-Test-Suite/level3/core/nodeinsertbefore21

<test name='nodeinsertbefore21' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-3 dom3.xsd'>
     <metadata>
          <title>nodeinsertbefore21</title>
          <creator>IBM</creator>
          <description> Using insertBefore on an Element node attempt to insert the parent Element node, before an EntityReference or Text child and verify if a HIERARCHY_REQUEST_ERR is raised. </description>
          <contributor>Neil Delima</contributor>
          <date qualifier='created'>2002-06-10</date>
          <subject resource='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core#ID-952280727'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='element' type='Element'/>
     <var name='refNode' type='Node'/>
     <var name='newNode' type='Element'/>
     <var name='childList' type='NodeList'/>
     <var name='inserted' type='Node'/>
     <load var='doc' href='hc_staff' willBeModified='true'/>
     <getElementsByTagName var='childList' obj='doc' tagname='"var"' interface='Document'/>
     <item var='element' obj='childList' index='2' interface='NodeList'/>
     <firstChild var='refNode' obj='element' interface='Node'/>
     <parentNode var='newNode' obj='element' interface='Node'/>
     <assertDOMException id='throw_HIERARCHY_REQUEST_ERR'>
          <HIERARCHY_REQUEST_ERR>
               <insertBefore obj='element' var='inserted' refChild='refNode' newChild='newNode'/>
          </HIERARCHY_REQUEST_ERR>
     </assertDOMException>
</test>

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