public void testIncludeFilter() throws Exception {
PluginFilterRetriever fb = new PluginFilterRetriever();
PluginFilter bean = fb.getPluginFilter("one, two", " three , four ");
assertTrue(bean instanceof IncludingPluginFilter);
IncludingPluginFilter filter = (IncludingPluginFilter)bean;
Set suppliedNames = filter.getSuppliedNames();
assertEquals(2, suppliedNames.size());
assertTrue(suppliedNames.contains("two"));
}