Tests that Tesseract OCR works
Test tesseract-001.xml is expected to pass.
<p:declare-step xmlns:cx="http://xmlcalabash.com/ns/extensions" xmlns:p="http://www.w3.org/ns/xproc" name="main" version="3.0">
<p:import href="https://xmlcalabash.com/ext/library/pdf-steps.xpl"/>
<p:import href="https://xmlcalabash.com/ext/library/tesseract.xpl"/>
<p:output port="result"/>
<cx:pdf-to-images dpi="300">
<p:with-input port="source" href="../documents/example.pdf"/>
</cx:pdf-to-images>
<cx:tesseract language="eng" output-format="text" debug-output="/dev/null"/>
<p:wrap-sequence wrapper="text"/>
</p:declare-step>
<s:schema xmlns:s="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
<s:pattern>
<s:rule context="/">
<s:assert test="text">Wrong document element></s:assert>
</s:rule>
</s:pattern>
<s:pattern>
<s:rule context="/text">
<s:assert test="empty(*)">Unexpected elements</s:assert>
<s:assert test="contains(., 'This is a sample PDF document.')">Expected text missing</s:assert>
</s:rule>
</s:pattern>
</s:schema>
Created test.