Tests DRP is context node for TVT in a p:try step (catch pipeline)
Test ab-drp-context-004.xml is expected to pass.
<p:declare-step xmlns:c="http://www.w3.org/ns/xproc-step" xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
   <p:output port="result">
   <p:identity>
      <p:with-input>
         <doc>
            <value>5</value>
         </doc>
      </p:with-input>
   </p:identity>
   <p:try>
      <p:error code="error">
         <p:with-input>
            <ERROR>failure</ERROR>
         </p:with-input>
      </p:error>
      <p:catch>
         <p:identity>
            <p:with-input>
               <result>{/c:errors/c:error/ERROR/text()}</result>
            </p:with-input>
         </p:identity>
      </p:catch>
   </p:try>
</p:declare-step>
<s:schema xmlns="http://www.w3.org/1999/xhtml" xmlns:s="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
   <s:pattern>
      <s:rule context="/">
         <s:assert test="/result">Document root is not named 'result'.</s:assert>
         <s:assert test="count(*) = 1">Document does not have exactly one child element.</s:assert>
         <s:assert test="/result/text() = 'failure'">Element 'result' has the wrong content.</s:assert>
      </s:rule>
   </s:pattern>
</s:schema>
Added attribute 'queryBinding' to schematron's schema.
Fixed XPath expression in TVT.
Updated to reflect that the input to ‘p:error’ is passed through.
Updated to reflect that the ‘error’ port is now the DRP in p:catch.
Created new test