public List<String> searcherNames(Collection<Searcher> searchers) {
        List<String> names = new ArrayList<>();

        for (Searcher searcher: searchers) {
            names.add(searcher.getId().stringValue());
        }

        Collections.sort(names);
        return names;
    }
Tests basic search chain functionality - creation, inheritance and ordering

@author bratseth
container-search/src/test/java/com/yahoo/search/searchchain/test/SearchChainTestCase.java