/**
   * Accuracy test for the method <code>deleteProjectMetadataKey(long projectMetadataKeyId,
   * long userId)</code>.<br>
   * The result should be correct.
   *
   * @throws Exception to JUnit.
   */
  @Test
  public void test_deleteProjectMetadataKey() throws Exception {
    instance.createProjectMetadataKey(projectMetadataKey, userId);

    instance.deleteProjectMetadataKey(projectMetadataKey.getId(), userId);

    assertNull(
        "'deleteProjectMetadataKey' should be correct.",
        em.find(DirectProjectMetadataKey.class, projectMetadataKey.getId()));
  }
 /**
  * Failure test for the method <code>deleteProjectMetadataKey(long projectMetadataKeyId,
  * long userId)</code> with requested entity is not found in db.<br>
  * <code>EntityNotFoundException</code> is expected.
  *
  * @throws Exception to JUnit.
  */
 @Test(expected = EntityNotFoundException.class)
 public void test_deleteProjectMetadataKey_EntityNotFoundError() throws Exception {
   instance.deleteProjectMetadataKey(Long.MAX_VALUE, userId);
 }