/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see .
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kIndex
#include "mongo/platform/basic.h"
#include "mongo/db/index/expression_keys_private.h"
#include
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/simple_bsonobj_comparator.h"
#include "mongo/db/hasher.h"
#include "mongo/db/json.h"
#include "mongo/db/query/collation/collator_interface_mock.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/log.h"
using namespace mongo;
namespace {
const HashSeed kHashSeed = 0;
const int kHashVersion = 0;
std::string dumpKeyset(const BSONObjSet& objs) {
std::stringstream ss;
ss << "[ ";
for (BSONObjSet::iterator i = objs.begin(); i != objs.end(); ++i) {
ss << i->toString() << " ";
}
ss << "]";
return ss.str();
}
bool assertKeysetsEqual(const BSONObjSet& expectedKeys, const BSONObjSet& actualKeys) {
if (expectedKeys.size() != actualKeys.size()) {
log() << "Expected: " << dumpKeyset(expectedKeys) << ", "
<< "Actual: " << dumpKeyset(actualKeys);
return false;
}
if (!std::equal(expectedKeys.begin(),
expectedKeys.end(),
actualKeys.begin(),
SimpleBSONObjComparator::kInstance.makeEqualTo())) {
log() << "Expected: " << dumpKeyset(expectedKeys) << ", "
<< "Actual: " << dumpKeyset(actualKeys);
return false;
}
return true;
}
BSONObj makeHashKey(BSONElement elt) {
return BSON("" << BSONElementHasher::hash64(elt, kHashSeed));
}
TEST(HashKeyGeneratorTest, CollationAppliedBeforeHashing) {
BSONObj obj = fromjson("{a: 'string'}");
BSONObjSet actualKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
CollatorInterfaceMock collator(CollatorInterfaceMock::MockType::kReverseString);
ExpressionKeysPrivate::getHashKeys(
obj, "a", kHashSeed, kHashVersion, false, &collator, &actualKeys);
BSONObj backwardsObj = fromjson("{a: 'gnirts'}");
BSONObjSet expectedKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
expectedKeys.insert(makeHashKey(backwardsObj["a"]));
ASSERT(assertKeysetsEqual(expectedKeys, actualKeys));
}
TEST(HashKeyGeneratorTest, CollationDoesNotAffectNonStringFields) {
BSONObj obj = fromjson("{a: 5}");
BSONObjSet actualKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
CollatorInterfaceMock collator(CollatorInterfaceMock::MockType::kReverseString);
ExpressionKeysPrivate::getHashKeys(
obj, "a", kHashSeed, kHashVersion, false, &collator, &actualKeys);
BSONObjSet expectedKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
expectedKeys.insert(makeHashKey(obj["a"]));
ASSERT(assertKeysetsEqual(expectedKeys, actualKeys));
}
TEST(HashKeyGeneratorTest, CollatorAppliedBeforeHashingNestedObject) {
BSONObj obj = fromjson("{a: {b: 'string'}}");
BSONObj backwardsObj = fromjson("{a: {b: 'gnirts'}}");
BSONObjSet actualKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
CollatorInterfaceMock collator(CollatorInterfaceMock::MockType::kReverseString);
ExpressionKeysPrivate::getHashKeys(
obj, "a", kHashSeed, kHashVersion, false, &collator, &actualKeys);
BSONObjSet expectedKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
expectedKeys.insert(makeHashKey(backwardsObj["a"]));
ASSERT(assertKeysetsEqual(expectedKeys, actualKeys));
}
TEST(HashKeyGeneratorTest, NoCollation) {
BSONObj obj = fromjson("{a: 'string'}");
BSONObjSet actualKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
ExpressionKeysPrivate::getHashKeys(
obj, "a", kHashSeed, kHashVersion, false, nullptr, &actualKeys);
BSONObjSet expectedKeys = SimpleBSONObjComparator::kInstance.makeBSONObjSet();
expectedKeys.insert(makeHashKey(obj["a"]));
ASSERT(assertKeysetsEqual(expectedKeys, actualKeys));
}
} // namespace