assertNull(builder.build().getModelVersion());

        model = Model.newBuilder().modelVersion("5.0.0").build();
        builder = Model.newBuilder(model);
        modelMerger.mergeModel_ModelVersion(builder, model, parent, false, null);
        assertEquals("5.0.0", builder.build().getModelVersion());
    }

    // ArtifactId is neither inherited nor injected
    @Test