Tests XS0043 is raised because @port is not allowed on p:with-input.
Test ab-with-input-070.xml is expected to fail with error code err:XS0043.
<p:declare-step xmlns:err="http://www.w3.org/ns/xproc-error" xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
   <p:output port="result">
   <p:choose>
      <p:when test="true()">
         <p:with-input port="source">
            <doc/>
         </p:with-input>
         <p:identity/>
      </p:when>
   </p:choose>
</p:declare-step>
Replace <true/> with <p:identity/>.
Test anonymous input ports etc. are treated right.