Test http://www.w3.org/2001/DOM-Test-Suite/level1/core/nodeparentnodenull

<test name='nodeparentnodenull' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-1 dom1.xsd'>
     <metadata>
          <title>nodeParentNodeNull</title>
          <creator>NIST</creator>
          <description> The "getParentNode()" method invoked on a node that has just been created and not yet added to the tree is null. Create a new "employee" Element node using the "createElement(name)" method from the Document interface. Since this new node has not yet been added to the tree, the "getParentNode()" method will return null. </description>
          <contributor>Mary Brady</contributor>
          <date qualifier='created'>2001-08-17</date>
          <subject resource='http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/level-one-core#ID-1060184317'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='createdNode' type='Element'/>
     <var name='parentNode' type='Node'/>
     <load var='doc' href='staff' willBeModified='false'/>
     <createElement obj='doc' tagName='"employee"' var='createdNode'/>
     <parentNode interface='Node' obj='createdNode' var='parentNode'/>
     <assertNull actual='parentNode' id='parentNode'/>
</test>

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