Test http://www.w3.org/2001/DOM-Test-Suite/level3/core/nodereplacechild17

<test name='nodereplacechild17' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-3 dom3.xsd'>
     <metadata>
          <title>nodereplacechild17</title>
          <creator>IBM</creator>
          <description> Using replaceChild on a DocumentFragment node attempt to replace a Comment node with a ProcessingInstruction and vice versa verify the data of the replaced nodes. </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-785887307'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='docFrag' type='DocumentFragment'/>
     <var name='pi' type='ProcessingInstruction'/>
     <var name='cmt' type='Comment'/>
     <var name='replacedCmt' type='Comment'/>
     <var name='replacedPi' type='ProcessingInstruction'/>
     <var name='data' type='DOMString'/>
     <var name='target' type='DOMString'/>
     <var name='appendedChild' type='Node'/>
     <load var='doc' href='hc_staff' willBeModified='true'/>
     <createDocumentFragment var='docFrag' obj='doc'/>
     <createComment var='cmt' obj='doc' data='"Comment"'/>
     <createProcessingInstruction var='pi' obj='doc' target='"target"' data='"Comment"'/>
     <appendChild obj='docFrag' var='appendedChild' newChild='pi'/>
     <appendChild obj='docFrag' var='appendedChild' newChild='cmt'/>
     <replaceChild var='replacedCmt' obj='docFrag' oldChild='cmt' newChild='pi'/>
     <data var='data' obj='replacedCmt' interface='CharacterData'/>
     <assertEquals actual='data' expected='"Comment"' id='nodereplacechild17_1' ignoreCase='false'/>
     <replaceChild var='replacedPi' obj='docFrag' oldChild='pi' newChild='cmt'/>
     <target var='target' obj='replacedPi' interface='ProcessingInstruction'/>
     <assertEquals actual='target' expected='"target"' id='nodereplacechild17_2' ignoreCase='false'/>
</test>

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