Spinning up Cayenne in a unit test.

So I have a project which is running in Bootique, but the data model is
used in several different apps. To facilitate this, we created a jar file
that includes the generated classes, and the code and the
cayenne-project.xml file in one jar file.  The result of this is tests run
for this jar, don't have access to the bootique runtime, as they are part
of a jar that's going to be included in other apps.

We're using an older version of Bootique and so the version of Cayenne is
4.0.B2

The cayenne project, only has a datamap there is no datanode defined in the
xml.

So I'm trying to spin up a cayenne runtime, using this code.

runtime = ServerRuntime.builder()
        .addConfig("cayenne-CohortManager.xml")
        .addModule(binder -> {
            ServerModule.contributeProperties(binder)
                    .put("cayenne.jdbc.driver", "org.h2.Driver")
                    .put("cayenne.jdbc.url", "jdbc:h2:mem:CohortDB");
        })
        .build();


The problem is that later, when I try to commit changes, I get this error:

org.apache.cayenne.CayenneRuntimeException: [v.4.0.B2 Sep 26 2017
10:05:06] No DataNode configured for DataMap 'datamap' and no default
DataNode set

I'm successfully able to run other tests, because they never do a
commitobjects.


Any suggestions on how to resolve my problem.