assertEquals(
                createSet(new Object[] {a.artifact, b.artifact, c.artifact, d.artifact}),
                res.getArtifacts(),
                "Check artifact list");

        ArtifactFilter filter = new ExclusionSetFilter(new String[] {"b"});
        res = collect(a, filter);
        assertEquals(createSet(new Object[] {a.artifact, c.artifact}), res.getArtifacts(), "Check artifact list");