@Test
    void testArtifact() throws Exception {
        ArtifactRepository remoteRepository = remoteRepository();

        ArtifactRepository localRepository = localRepository();

        Artifact a = createArtifact("a", "0.0.1-SNAPSHOT");
        File file = new File(localRepository.getBasedir(), localRepository.pathOf(a));
        file.delete();
        a.setFile(file);

        File touchFile = updateCheckManager.getTouchfile(a);