### Question:
LanguageQueryFilter implements QueryFilter { @Override public List filterResults(List results) { return results; }  @Override String filterStatement(String statement, String language); @Override List filterResults(List results);  }### Answer:
@Test public void filterResults() { List<String> items = Arrays.asList("one", "two"); List<String> result = this.filter.filterResults(items); assertSame(items, result); }