Tests @depends on p:group must not form a cycle.
Test ab-depends-017.xml is expected to fail with error code err:XS0001
.
<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:group depends="second">
<p:identity>
<p:with-input>
<doc1/>
</p:with-input>
</p:identity>
</p:group>
<p:identity name="second"/>
</p:declare-step>
Added new tests for [p:] depends.