@After
 public void tearDown() throws Exception {
   mockBuyerContext = null;
   mockPurchaseBooksInterceptor = null;
   fixture = null;
   super.tearDown();
 }
 @Before
 public void setUp() throws Exception {
   mockBuyerContext = new BuyerContext();
   mockPurchaseBooksInterceptor = mock(PurchaseBooksInterceptor.class);
   CheckpointManager.setJAXBSessionCache(getJAXBSessionCache());
   CheckpointManager.addConfiguration("bookshop2-buyer-service-checks.xml");
   super.setUp();
 }