@Test
public void wrongCommitWillNotBeGuessed() {

    // The instance name format is critical there.
    Smell instance = new Smell("MIM", "d.e.f", sameCommit.newFile);
    Commit commit = new Commit("anyothercommit", 1);
    SmellDuplicationChecker checker = getDuplicationChecker();
    Smell original = checker.original(instance, commit, parent);
    assertNull(original);
}