Test http://www.w3.org/2001/DOM-Test-Suite/level3/core/nodesetuserdata06

<test name='nodesetuserdata06' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-3 dom3.xsd'>
     <metadata>
          <title>nodesetuserdata06</title>
          <creator>IBM</creator>
          <description> Invoke setUserData on a new Comment to set its UserData to an Entity node twice using the same key. Verify if the UserData object that was by the second setUserData is the same as original Entity. </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#Node3-setUserData'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='docType' type='DocumentType'/>
     <var name='entities' type='NamedNodeMap'/>
     <var name='entity' type='Entity'/>
     <var name='comment' type='Comment'/>
     <var name='userData' type='DOMUserData'/>
     <var name='returned' type='DOMUserData'/>
     <var name='retUserData' type='DOMUserData'/>
     <var name='success' type='boolean'/>
     <var name='nullHandler' type='UserDataHandler' isNull='true'/>
     <load var='doc' href='hc_staff' willBeModified='true'/>
     <doctype var='docType' obj='doc'/>
     <entities var='entities' obj='docType'/>
     <getNamedItem var='entity' obj='entities' name='"delta"'/>
     <createComment var='comment' obj='doc' data='"COMMENT_NODE"'/>
     <setUserData obj='comment' var='retUserData' key='"Key1"' data='entity' handler='nullHandler'/>
     <setUserData var='returned' obj='comment' key='"Key1"' data='entity' handler='nullHandler'/>
     <isEqualNode var='success' obj='returned' arg='entity'/>
     <assertTrue actual='success' id='nodesetuserdata06'/>
</test>

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