/** @throws java.lang.Exception */
  @BeforeClass
  public static void setUp() throws Exception {
    db = ProofDatabase.load("/Users/ChrisSalij/Code/eclipse/FourthYearProject/resources/database");
    proof = db.getProof("((a∧a)≡a)");

    Expression n =
        Reader.parseExpression(
            "((a"
                + Characters.LOGICAL_CONJUNCTION
                + "b)"
                + Characters.LOGICAL_CONJUNCTION
                + "(c"
                + Characters.LOGICAL_CONJUNCTION
                + "d))");
    masterTree = new UndoTree(null, proof, n, null);
    masterTree = masterTree.addChild(proof, n, "");
    masterTree = masterTree.addChild(proof, n, "");
    masterTree = masterTree.addChild(proof, n, "");
    masterTree = masterTree.addChild(proof, n, "");
    masterTree = masterTree.addChild(proof, n, "");
    masterTree.save(new File(treeLoc));
  }