DataModelSource result = retriever.createSource(definition, exporter, EMPTY);
try {
DataModelReflection ref;
ref = result.next();
assertThat(ref, is(not(nullValue())));
assertThat(definition.toObject(ref), is(new Text("Hello, world!")));
ref = result.next();
assertThat(ref, is(not(nullValue())));
assertThat(definition.toObject(ref), is(new Text("This is a test.")));