private static SchemaInfo schemaInfo(String schemaName) {
        var schema = new Schema.Builder(schemaName);
        schema.add(new RankProfile.Builder("default").build());
        return new SchemaInfo(List.of(schema.build()),  List.of());
    }
Tests the Fast searcher

@author bratseth
container-search/src/test/java/com/yahoo/prelude/fastsearch/IndexedBackendTestCase.java