Test http://www.w3.org/2001/DOM-Test-Suite/level3/core/nodecomparedocumentposition13

<test name='nodecomparedocumentposition13' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-3 dom3.xsd'>
     <metadata>
          <title>nodecomparedocumentposition13</title>
          <creator>IBM</creator>
          <description> Using compareDocumentPosition check if the Document node contains and precedes the new Comment node, and if the Comment node is contained and follows the Document node. </description>
          <contributor>Jenny Hsu</contributor>
          <date qualifier='created'>2003-02-20</date>
          <subject resource='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core#Node3-compareDocumentPosition'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='comment' type='Comment'/>
     <var name='elem' type='Element'/>
     <var name='elemList' type='NodeList'/>
     <var name='documentPosition' type='int'/>
     <var name='commentPosition' type='int'/>
     <var name='appendedChild' type='Node'/>
     <load var='doc' href='hc_staff' willBeModified='true'/>
     <createComment var='comment' obj='doc' data='"Another Comment"'/>
     <getElementsByTagName var='elemList' obj='doc' tagname='"p"' interface='Document'/>
     <item var='elem' obj='elemList' index='3' interface='NodeList'/>
     <appendChild obj='elem' var='appendedChild' newChild='comment'/>
     <compareDocumentPosition var='documentPosition' obj='doc' other='comment'/>
     <assertEquals actual='documentPosition' expected='20' id='nodecomparedocumentpositionIsContainedFollowing13' ignoreCase='false'/>
     <compareDocumentPosition var='commentPosition' obj='comment' other='doc'/>
     <assertEquals actual='commentPosition' expected='10' id='nodecomparedocumentpositionContainsPRECEDING13' ignoreCase='false'/>
</test>

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