@Test
public void testGetSerializer() {

  // Test that a valid serializer class is returned when its present
  assertNotNull("A valid class must be returned for default Writable SerDe",
      factory.getSerializer(Writable.class));
  // Test that a null is returned when none can be found.
  assertNull("A null should be returned if there are no serializers found.",
      factory.getSerializer(TestSerializationFactory.class));
}