@Test
  public void testAddSerializerForTransientPersistentCombo() throws Exception {
    DefaultSerializationProviderConfiguration config =
        new DefaultSerializationProviderConfiguration();
    config.addSerializerFor(Long.class, ComboSerializer.class);

    assertSame(ComboSerializer.class, config.getPersistentSerializers().get(Long.class));
    assertSame(ComboSerializer.class, config.getTransientSerializers().get(Long.class));
  }
  @Test
  public void testAddSerializerForPersistent() throws Exception {
    DefaultSerializationProviderConfiguration config =
        new DefaultSerializationProviderConfiguration();
    config.addSerializerFor(Long.class, PersistentSerializer.class);

    assertTrue(config.getTransientSerializers().isEmpty());
    assertSame(PersistentSerializer.class, config.getPersistentSerializers().get(Long.class));
  }