@Test
  public void getPurchasesTest() {

    List<PurchaseEntity> list = purchasePersistence.findAll(null, null);

    Assert.assertEquals(data.size(), list.size());
    for (PurchaseEntity newEntity : list) {
      boolean found = false;
      for (PurchaseEntity entity : data) {
        if (newEntity.getId().equals(entity.getId())) {
          found = true;
        }
      }
      Assert.assertTrue(found);
    }
  }