Test http://www.w3.org/2001/DOM-Test-Suite/level3/core/noderemovechild13

<test name='noderemovechild13' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-3 dom3.xsd'>
     <metadata>
          <title>noderemovechild13</title>
          <creator>IBM</creator>
          <description> Using removeChild on a new EntityReference node attempt to remove the first child of this node and verify if a NO_MODIFICATION_ALLOWED_ERR is thrown. </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-1734834066'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='txt' type='Text'/>
     <var name='eRef' type='EntityReference'/>
     <var name='removed' type='Node'/>
     <load var='doc' href='hc_staff' willBeModified='true'/>
     <createEntityReference var='eRef' obj='doc' name='"alpha"'/>
     <firstChild obj='eRef' var='txt' interface='Node'/>
     <assertNotNull actual='txt' id='txtNotNull'/>
     <assertDOMException id='throw_NO_MODIFICATION_ALLOWED_ERR'>
          <NO_MODIFICATION_ALLOWED_ERR>
               <removeChild obj='eRef' var='removed' oldChild='txt'/>
          </NO_MODIFICATION_ALLOWED_ERR>
     </assertDOMException>
</test>

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