// Build up an artifactMap
        project.addArtifact(new Artifact("g0", "a0", "v0", "e0", "c0"));
        project.addArtifact(new Artifact("g1", "a1", "v1", "e1", "c1"));
        project.addArtifact(new Artifact("g2", "a2", "v2", "e2", "c2"));
    }

    /**
     * <p>testValueExtraction.</p>
     *
     * @throws Exception if any.
     */
    @Test
    void testValueExtraction() throws Exception {