### Question:
DateCheckpointType implements CheckpointType { @Override public String buildFilter(Object fieldValue, Map<String, String> context) { return new SimpleDateFormat(getDatePattern(context)).format(fieldValue); }  @Override String buildFilter(Object fieldValue, Map<String, String> context); @Override String buildDefaultFilter(Map<String, String> context); @Override Boolean isValidCurrentCheckpoint(Object currentCheckpoint, Map<String, String> context); @Override Object parseFilter(Object o, Map<String, String> context);  }### Answer:
@Test public void testBuildFilter() throws Exception { String filter = dateCheckpointType.buildFilter(fieldValue, context); Assert.assertNotNull(filter); }