### Question:
LowerCaseFilterFactory implements TokenFilterFactory { public TokenFilter createTokenFilter(TokenStream tokenStream, Properties properties) throws IOException { return new LowerCaseFilter(tokenStream); }  TokenFilter createTokenFilter(TokenStream tokenStream, Properties properties); void preloadResources(Properties properties);  }### Answer:
@Test public void testCreateTokenFilter() throws IOException { LowerCaseFilter lowercaseFilter = (LowerCaseFilter) lowercaseFilterFactory.createTokenFilter(tokenStream, null); assertNotNull(lowercaseFilter); }