Here is a B-unit source template, showing most of the sections of a B-unit file.
<?xml version="1.0" encoding="UTF-8"?>
<abu:bpelUnit xmlns:abu="http://schemas.active-endpoints.com
/activebpelunit/2008/10/activebpelunit.xsd"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<abu:trace>on</abu:trace>
<abu:engineProperties>
<abu:documentation>Controls engine configuration
options, including process logging.
</abu:documentation>
<abu:engineProperty path="Logging"
value="urn:ae:execution"/>
</abu:engineProperties>
<abu:bpels>
<abu:documentation>Controls deployment of the BPEL
process to the test engine.</abu:documentation>
<abu:bpel location="../bpel
/loanProcessHumanCompleted.bpel"/>
</abu:bpels>
<abu:wsdls>
<abu:documentation>Controls deployment of the WSDL files
to the test engine.</abu:documentation>
<abu:wsdl location="../wsdl/loanProcess.wsdl"/>
</abu:wsdls>
<abu:schemas>
<abu:documentation>Controls deployment of the XML Schema
files to the test engine.</abu:documentation>
<abu:schema location="../schema/loanRequest.xsd"/>
</abu:schemas>
<abu:resources>
<abu:documentation>Controls deployment of resource
mappings to the test engine.</abu:documentation>
<abu:resource location="../xsl-renderings/
loan_taskdetail.xsl" locationHint=
"project:/humantaskcompleted/xsl-renderings/
loan_taskdetail.xsl"
type="http://www.w3.org/1999/XSL/Transform"/>
<abu:resource location="../xsl-renderings/
loan_param2commands.xsl" locationHint=
"project:/humantaskcompleted/xsl-renderings/
loan_param2commands.xsl"
type="http://www.w3.org/1999/XSL/Transform"/>
</abu:resources>
<abu:invokes>
<abu:documentation>Defines the simulated output and
assertions to perform on invoke activities
</abu:documentation>
<abu:invoke count="1" name="NotifyCRMOfExpiration">
<abu:invokeIteration index="0"/>
</abu:invoke>
</abu:invokes>
<abu:commands>
<abu:documentation>Sends messages to the B-unit
test engine
to execute the test logic.</abu:documentation>
<abu:sendMessage async="true"
operation="request" partnerLink="LoanProcess">
</abu:sendMessage>
<!-- Tells the test to wait before making final assertions -->
<abu:waitUntil xmlns:
ns="http://docs.active-endpoints.com/sample/bpel
/loanprocess/2008/02/loanProcessHumanCompleted.bpel"
processName="ns:loanProcessHumanCompleted"
timeout="5000"/>
</abu:commands>
</abu:bpelUnit>