ranker_test

static void
gen_uniqterms_gt_doclen_db(Xapian::WritableDatabase& db, const string&)
{
    Xapian::Document doc;
    Xapian::TermGenerator termgenerator;
    termgenerator.set_document(doc);
    termgenerator.set_stemmer(Xapian::Stem("en"));
    termgenerator.index_text("What is AI (Artificial Intelligence) - "
                 "Definition from WhatIs", 1, "S");
    termgenerator.index_text("AI (pronounced AYE-EYE) or artificial "
                 "intelligence is the simulation of human "
                 "intelligence processes by machines, especially "
                 "computer systems. These processes include "
                 "learning (the acquisition of information and "
                 "rules for using the information), reasoning "
                 "(using the rules to reach approximate or "
                 "definite conclusions), and self-correction. "
                 "Particular applications of AI include expert "
                 "systems, speech recognition and machine vision.",
                 1, "XD");
    termgenerator.index_text("What is AI (Artificial Intelligence) - "
                 "Definition from WhatIs");
    termgenerator.increase_termpos();
    termgenerator.index_text("AI (pronounced AYE-EYE) or artificial "
                 "intelligence is the simulation of human "
                 "intelligence processes by machines, especially "
                 "computer systems. These processes include "
                 "learning (the acquisition of information and "
                 "rules for using the information), reasoning "
                 "(using the rules to reach approximate or "
                 "definite conclusions), and self-correction. "
                 "Particular applications of AI include expert "
                 "systems, speech recognition and machine vision");
    db.add_document(doc);
    doc.clear_terms();
    termgenerator.index_text("Artificial Intelligence-Wikipedia", 1, "S");
    termgenerator.index_text("Artificial intelligence (AI) is intelligence "
                 "exhibited by machines. In computer science, the "
                 "field of AI research defines itself as the study "
                 "of intelligent agents: any device that perceives "
                 "its environment and takes actions that maximize "
                 "its chance of success at some goal. "
                 "Colloquially, the term artificial intelligence "
                 "is applied when a machine mimics cognitive "
                 "functions that humans associate with other human "
                 "minds, such as learning and problem solving.", 1,
                 "XD");
    termgenerator.index_text("Artificial Intelligence-Wikipedia");
    termgenerator.increase_termpos();
    termgenerator.index_text("Artificial intelligence (AI) is intelligence "
                 "exhibited by machines. In computer science, the "
                 "field of AI research defines itself as the study "
                 "of intelligent agents: any device that perceives "
                 "its environment and takes actions that maximize "
                 "its chance of success at some goal. "
                 "Colloquially, the term artificial intelligence "
                 "is applied when a machine mimics cognitive "
                 "functions that humans associate with other human "
                 "minds, such as learning and problem solving.");
    db.add_document(doc);
}

DEFINE_TESTCASE(ranker1, generated) {
    Xapian::Ranker *ranker = new Xapian::ListNETRanker();
    Xapian::Database db = get_database("apitest_ranker1",
                       gen_uniqterms_gt_doclen_db);
    Xapian::Enquire enquire(db);
    enquire.set_query(Xapian::Query("artificial"));
    Xapian::MSet mymset = enquire.get_mset(0, 10);
    string query ="20001 'artificial'";
    string qrel = "20001 Q0 1 1\n20001 Q0 2 2";
    std::ofstream myfile;
    myfile.open("query.txt");
    myfile << query;
    myfile.close();
    myfile.open("qrel.txt");
    myfile << qrel;
    myfile.close();
    Xapian::prepare_training_file(get_database_path("apitest_ranker1").c_str(),
                  "query.txt","qrel.txt",10);
    //ranker->set_database_path(get_database_path("apitest_ranker"));
    //ranker->set_query(Xapian::Query("and"));

    delete ranker;

    return true;
}