TransformationDescription desc = getDescriptionForModelAToModelB();
desc.padField("idA", "idB", "4", "0", "Start");
desc.padField("testA", "testB", "7", "!", "End");
installTransformation(desc);
ModelA model = new ModelA();
model.setIdA("1");
model.setTestA("works?");
ModelB result = transformModelAToModelB(model);
assertThat(result.getIdB(), is("0001"));
assertThat(result.getTestB(), is("works?!"));
}