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/** @file
* @brief Tests of the query optimiser.
*/
/* Copyright (C) 2009 Lemur Consulting Ltd
* Copyright (C) 2019,2024 Olly Betts
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see
* <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "api_queryopt.h"
#include <xapian.h>
#include "testsuite.h"
#include "testutils.h"
#include "apitest.h"
#include <vector>
using namespace std;
class MyDontUsePostingSource : public Xapian::PostingSource {
public:
MyDontUsePostingSource() : Xapian::PostingSource() {}
PostingSource* clone() const override {
return new MyDontUsePostingSource();
}
void reset(const Xapian::Database&, Xapian::doccount) override { }
double get_weight() const override {
FAIL_TEST("MyDontUsePostingSource::get_weight() called");
}
// These bounds could be better, but that's not important here.
Xapian::doccount get_termfreq_min() const override {
FAIL_TEST("MyDontUsePostingSource::get_termfreq_min() called");
}
Xapian::doccount get_termfreq_est() const override {
FAIL_TEST("MyDontUsePostingSource::get_termfreq_est() called");
}
Xapian::doccount get_termfreq_max() const override {
FAIL_TEST("MyDontUsePostingSource::get_termfreq_max() called");
}
void next(double) override {
FAIL_TEST("MyDontUsePostingSource::next() called");
}
void skip_to(Xapian::docid, double) override {
FAIL_TEST("MyDontUsePostingSource::skip_to() called");
}
bool at_end() const override {
FAIL_TEST("MyDontUsePostingSource::at_end() called");
}
Xapian::docid get_docid() const override {
FAIL_TEST("MyDontUsePostingSource::get_docid() called");
}
string get_description() const override {
return "MyDontUsePostingSource";
}
};
/// Test that ANDMAYBE branches are ignored if their weight factor is 0.
DEFINE_TESTCASE(boolandmaybe1, backend && !remote) {
Xapian::Enquire enquire(get_database("etext"));
MyDontUsePostingSource src;
Xapian::Query query(Xapian::Query::OP_AND_MAYBE,
Xapian::Query::MatchAll,
Xapian::Query(&src));
enquire.set_query(0.0 * query);
enquire.get_mset(0, 10);
enquire.set_weighting_scheme(Xapian::BoolWeight());
enquire.set_query(query);
enquire.get_mset(0, 10);
}
/** Test that ANDMAYBE branches return same documents and lists of matching
* terms when their weight factor is 0.
*/
DEFINE_TESTCASE(boolandmaybe2, backend) {
Xapian::Query query(Xapian::Query::OP_AND_MAYBE,
Xapian::Query("last"), Xapian::Query("day"));
Xapian::MSet mset1, mset2, mset3;
Xapian::Database db(get_database("etext"));
Xapian::Enquire enquire1(db), enquire2(db), enquire3(db);
enquire1.set_query(0 * query);
mset1 = enquire1.get_mset(0, 1000);
enquire2.set_query(query);
enquire2.set_weighting_scheme(Xapian::BoolWeight());
mset2 = enquire2.get_mset(0, 1000);
enquire3.set_query(query);
mset3 = enquire3.get_mset(0, 1000);
TEST_EQUAL(mset1.size(), mset2.size());
TEST_EQUAL(mset1.size(), mset3.size());
vector<Xapian::docid> docids;
for (Xapian::doccount i = 0; i != mset3.size(); ++i) {
docids.push_back(*mset3[i]);
}
sort(docids.begin(), docids.end());
for (Xapian::doccount i = 0; i != mset1.size(); ++i) {
TEST_EQUAL(*mset1[i], *mset2[i]);
TEST_EQUAL(*mset1[i], docids[i]);
}
for (Xapian::docid did : docids) {
Xapian::TermIterator ti1(enquire1.get_matching_terms_begin(did));
Xapian::TermIterator ti2(enquire2.get_matching_terms_begin(did));
Xapian::TermIterator ti3(enquire3.get_matching_terms_begin(did));
while (ti1 != enquire1.get_matching_terms_end(did)) {
TEST(ti2 != enquire2.get_matching_terms_end(did));
TEST(ti3 != enquire3.get_matching_terms_end(did));
TEST_EQUAL(*ti1, *ti2);
TEST_EQUAL(*ti2, *ti3);
++ti1;
++ti2;
++ti3;
}
TEST(ti2 == enquire2.get_matching_terms_end(did));
TEST(ti3 == enquire3.get_matching_terms_end(did));
}
}
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