Test p:add-xml-base where the scheme changes with p:add-attribute. This test is adapted from nw-add-xml-base-005.xml, but using p:add-attribute instead of p:set-attributes.
Test ab-add-xml-base-001.xml is expected to pass.
<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:identity>
<p:with-input href="../documents/doc-with-entities.xml"/>
</p:identity>
<p:add-attribute attribute-name="xml:base" attribute-value="https://tests.xproc.org/documents/book.xml"/>
<p:add-xml-base/>
</p:declare-step>
<s:schema xmlns="http://www.w3.org/1999/xhtml" xmlns:err="http://www.w3.org/ns/xproc-error" xmlns:s="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
<s:pattern>
<s:rule context="/">
<s:assert test="book">Root element is not 'book'.</s:assert>
<s:assert test="book/@xml:base = 'https://tests.xproc.org/documents/book.xml'">
>Document element base URI is incorrect</s:assert>
<s:assert test="empty(book/preface/@xml:base)">Preface should not have an xml:base attribute</s:assert>
<s:assert test="ends-with(book/chapter[@label='1']/@xml:base, '/documents/subdir/chap1.xml')">First chapter base URI doesn’t have the correct suffix</s:assert>
<s:assert test="ends-with(book/chapter[@label='2']/@xml:base, '/documents/chap2.xml')">Second chapter base URI doesn’t have the correct suffix</s:assert>
</s:rule>
</s:pattern>
</s:schema>
Created test for p:add-xml-base.