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/**
* Copyright (C) 2012 10gen 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 <http://www.gnu.org/licenses/>.
*
* 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.
*/
#include "mongo/client/dbclientcursor.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/dbdirectclient.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/operation_context_impl.h"
#include "mongo/db/write_concern_options.h"
#include "mongo/dbtests/dbtests.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
/**
* Unit tests related to DBHelpers
*/
static const char * const ns = "unittests.removetests";
// TODO: Normalize with test framework
/** Simple test for Helpers::RemoveRange. */
class RemoveRange {
public:
RemoveRange() :
_min( 4 ), _max( 8 )
{
}
void run() {
OperationContextImpl txn;
DBDirectClient client(&txn);
for ( int i = 0; i < 10; ++i ) {
client.insert( ns, BSON( "_id" << i ) );
}
{
// Remove _id range [_min, _max).
ScopedTransaction transaction(&txn, MODE_IX);
Lock::DBLock lk(txn.lockState(), nsToDatabaseSubstring(ns), MODE_X);
Client::Context ctx(&txn, ns );
KeyRange range( ns,
BSON( "_id" << _min ),
BSON( "_id" << _max ),
BSON( "_id" << 1 ) );
mongo::WriteConcernOptions dummyWriteConcern;
Helpers::removeRange(&txn, range, false, dummyWriteConcern);
}
// Check that the expected documents remain.
ASSERT_EQUALS( expected(), docs(&txn) );
}
private:
BSONArray expected() const {
BSONArrayBuilder bab;
for ( int i = 0; i < _min; ++i ) {
bab << BSON( "_id" << i );
}
for ( int i = _max; i < 10; ++i ) {
bab << BSON( "_id" << i );
}
return bab.arr();
}
BSONArray docs(OperationContext* txn) const {
DBDirectClient client(txn);
auto_ptr<DBClientCursor> cursor = client.query( ns,
Query().hint( BSON( "_id" << 1 ) ) );
BSONArrayBuilder bab;
while ( cursor->more() ) {
bab << cursor->next();
}
return bab.arr();
}
int _min;
int _max;
};
class All: public Suite {
public:
All() :
Suite( "remove" )
{
}
void setupTests() {
add<RemoveRange>();
}
} myall;
//
// Tests getting disk locs for an index range
//
TEST(DBHelperTests, FindDiskLocs) {
OperationContextImpl txn;
DBDirectClient client(&txn);
// Some unique tag we can use to make sure we're pulling back the right data
OID tag = OID::gen();
client.remove( ns, BSONObj() );
int numDocsInserted = 10;
for ( int i = 0; i < numDocsInserted; ++i ) {
client.insert( ns, BSON( "_id" << i << "tag" << tag ) );
}
long long maxSizeBytes = 1024 * 1024 * 1024;
set<DiskLoc> locs;
long long numDocsFound;
long long estSizeBytes;
{
// search _id range (0, 10)
Lock::DBRead lk(txn.lockState(), ns);
KeyRange range( ns,
BSON( "_id" << 0 ),
BSON( "_id" << numDocsInserted ),
BSON( "_id" << 1 ) );
Status result = Helpers::getLocsInRange( &txn,
range,
maxSizeBytes,
&locs,
&numDocsFound,
&estSizeBytes );
ASSERT_EQUALS( result, Status::OK() );
ASSERT_EQUALS( numDocsFound, numDocsInserted );
ASSERT_NOT_EQUALS( estSizeBytes, 0 );
ASSERT_LESS_THAN( estSizeBytes, maxSizeBytes );
Database* db = dbHolder().get( &txn, nsToDatabase(range.ns) );
const Collection* collection = db->getCollection(&txn, ns);
// Make sure all the disklocs actually correspond to the right info
for ( set<DiskLoc>::const_iterator it = locs.begin(); it != locs.end(); ++it ) {
const BSONObj obj = collection->docFor(&txn, *it);
ASSERT_EQUALS(obj["tag"].OID(), tag);
}
}
}
//
// Tests index not found error getting disk locs
//
TEST(DBHelperTests, FindDiskLocsNoIndex) {
OperationContextImpl txn;
DBDirectClient client(&txn);
client.remove( ns, BSONObj() );
client.insert( ns, BSON( "_id" << OID::gen() ) );
long long maxSizeBytes = 1024 * 1024 * 1024;
set<DiskLoc> locs;
long long numDocsFound;
long long estSizeBytes;
{
Lock::DBRead lk(txn.lockState(), ns);
// search invalid index range
KeyRange range( ns,
BSON( "badIndex" << 0 ),
BSON( "badIndex" << 10 ),
BSON( "badIndex" << 1 ) );
Status result = Helpers::getLocsInRange( &txn,
range,
maxSizeBytes,
&locs,
&numDocsFound,
&estSizeBytes );
// Make sure we get the right error code
ASSERT_EQUALS( result.code(), ErrorCodes::IndexNotFound );
ASSERT_EQUALS( static_cast<long long>( locs.size() ), 0 );
ASSERT_EQUALS( numDocsFound, 0 );
ASSERT_EQUALS( estSizeBytes, 0 );
}
}
//
// Tests chunk too big error getting disk locs
//
TEST(DBHelperTests, FindDiskLocsTooBig) {
OperationContextImpl txn;
DBDirectClient client(&txn);
client.remove( ns, BSONObj() );
int numDocsInserted = 10;
for ( int i = 0; i < numDocsInserted; ++i ) {
client.insert( ns, BSON( "_id" << i ) );
}
// Very small max size
long long maxSizeBytes = 10;
set<DiskLoc> locs;
long long numDocsFound;
long long estSizeBytes;
{
Lock::DBRead lk(txn.lockState(), ns);
KeyRange range( ns,
BSON( "_id" << 0 ),
BSON( "_id" << numDocsInserted ),
BSON( "_id" << 1 ) );
Status result = Helpers::getLocsInRange( &txn,
range,
maxSizeBytes,
&locs,
&numDocsFound,
&estSizeBytes );
// Make sure we get the right error code and our count and size estimates are valid
ASSERT_EQUALS( result.code(), ErrorCodes::InvalidLength );
ASSERT_EQUALS( numDocsFound, numDocsInserted );
ASSERT_GREATER_THAN( estSizeBytes, maxSizeBytes );
}
}
} // namespace RemoveTests
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