p:filter 012 (NW)

Tests p:filter that returns a constant.

Test is expected to pass.

The pipeline

<p:declare-step xmlns:p="http://www.w3.org/ns/xproc"
                xmlns:t="http://xproc.org/ns/testsuite/3.0"
                xmlns:xs="http://www.w3.org/2001/XMLSchema" version="3.0">
   <p:output port="result"/>
   <p:option name="select" as="xs:string?"
             select="'chapter'"/>
   <p:variable name="eq" select="'='"/>
   <p:identity>
      <p:with-input>
         <book>
            <chapter>Hello, world.</chapter>
            <appendix>Goodbye, world.</appendix>
         </book>
      </p:with-input>
   </p:identity>
   <p:filter select="count(/book/*[local-name(.) {$eq} '{$select}'])"/>
   <p:cast-content-type content-type="application/xml"/>
</p:declare-step>

Result

<number xmlns="http://www.w3.org/2005/xpath-functions"
        xmlns:t="http://xproc.org/ns/testsuite/3.0">1</number>

Schematron checks

<s:schema xmlns="http://www.w3.org/1999/xhtml"
          xmlns:s="http://purl.oclc.org/dsdl/schematron" xmlns:t="http://xproc.org/ns/testsuite/3.0"
          queryBinding="xslt2">
   <s:ns prefix="fn"
         uri="http://www.w3.org/2005/xpath-functions"/>
   <s:pattern>
      <s:rule context="/">
         <s:assert test="fn:number">The result root is not a number.</s:assert>
         <s:assert test="string(.) = '1'">The result is not 1.</s:assert>
      </s:rule>
   </s:pattern>
</s:schema>

Revision history

24 Dec 2024, Norm Tovey-Walsh: Proposed test.