/**
  * Try to delete an app data value with a key that doesn't exist.
  *
  * @throws Exception when an error is encountered.
  */
 @Test
 public void testRemoveDataKeyThatDoesntExist() throws Exception {
   AppData appDataTestInstance = jpaAppDataMapper.findById(testAppDataId);
   jpaAppDataMapper.deleteAppDataValueByKey(appDataTestInstance.getId(), "nonexistent");
   jpaAppDataMapper.flush();
   getEntityManager().clear();
   AppData appDataTestInstanceRemoved = jpaAppDataMapper.findById(testAppDataId);
   assertFalse(
       "Data was not removed", appDataTestInstanceRemoved.getValues().containsKey("nonexistent"));
 }
 /**
  * Try to delete an app data value with a key that is attempting to use SQL Injection since keys
  * can be entered by users.
  *
  * @throws Exception when an error is encountered.
  */
 @Test
 public void testRemoveDataKeyThatIsBad() throws Exception {
   AppData appDataTestInstance = jpaAppDataMapper.findById(testAppDataId);
   jpaAppDataMapper.deleteAppDataValueByKey(appDataTestInstance.getId(), "viewcount' OR 1=1");
   jpaAppDataMapper.flush();
   getEntityManager().clear();
   AppData appDataTestInstanceRemoved = jpaAppDataMapper.findById(testAppDataId);
   assertTrue(
       "Data was removed with a bad key",
       appDataTestInstanceRemoved.getValues().containsKey("viewcount"));
 }