public Item assertParsed(String parsed, String toParse, String filter, Query.Type mode, Language language) {
        return assertParsed(parsed, toParse, filter, mode, language, linguistics);
    }
Asserts that the canonical representation of the second string when parsed
is the first string

@return the produced root
container-search/src/test/java/com/yahoo/prelude/query/parser/test/ParsingTester.java