* @throws Exception
*/
@Test
public void fileCloneFilter() throws Exception {
FileHistogramFilter filter = new FileHistogramFilter();
RevFilter clone = filter.clone();
assertNotNull(clone);
assertNotSame(filter, clone);
assertTrue(clone instanceof FileHistogramFilter);
FileHistogramFilter clonedFilter = (FileHistogramFilter) clone;
assertNotNull(clonedFilter.getHistogram());