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// btreetests.cpp : Btree unit tests
//
/**
* Copyright (C) 2008 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/>.
*/
#include "../db/btree.h"
#include "../db/db.h"
#include "dbtests.h"
namespace BtreeTests {
class Base {
public:
Base() {
setClient( ns() );
BSONObjBuilder builder;
builder.append( "ns", ns() );
builder.append( "name", "testIndex" );
BSONObj bobj = builder.done();
idx_.info =
theDataFileMgr.insert( ns(), bobj.objdata(), bobj.objsize() );
idx_.head = BtreeBucket::addHead( idx_ );
}
~Base() {
// FIXME cleanup all btree buckets.
theDataFileMgr.deleteRecord( ns(), idx_.info.rec(), idx_.info );
ASSERT( theDataFileMgr.findAll( ns() )->eof() );
}
protected:
BtreeBucket* bt() const {
return idx_.head.btree();
}
DiskLoc dl() const {
return idx_.head;
}
IndexDetails& id() {
return idx_;
}
static const char* ns() {
return "unittests.btreetests";
}
// dummy, valid record loc
static DiskLoc recordLoc() {
return DiskLoc( 0, 2 );
}
void checkValid( int nKeys ) const {
ASSERT( bt() );
ASSERT( bt()->isHead() );
bt()->assertValid( order(), true );
ASSERT_EQUALS( nKeys, bt()->fullValidate( dl(), order() ) );
}
void insert( BSONObj &key ) {
bt()->bt_insert( dl(), recordLoc(), key, order(), true, id(), true );
}
void unindex( BSONObj &key ) {
bt()->unindex( dl(), id(), key, recordLoc() );
}
static BSONObj simpleKey( char c, int n = 1 ) {
BSONObjBuilder builder;
string val( n, c );
builder.append( "a", val );
return builder.obj();
}
void locate( BSONObj &key, int expectedPos,
bool expectedFound, const DiskLoc &expectedLocation,
int direction = 1 ) {
int pos;
bool found;
DiskLoc location =
bt()->locate( id(), dl(), key, order(), pos, found, recordLoc(), direction );
ASSERT_EQUALS( expectedFound, found );
ASSERT( location == expectedLocation );
ASSERT_EQUALS( expectedPos, pos );
}
BSONObj order() const {
return idx_.keyPattern();
}
private:
dblock lk_;
IndexDetails idx_;
};
class Create : public Base {
public:
void run() {
checkValid( 0 );
}
};
class SimpleInsertDelete : public Base {
public:
void run() {
BSONObj key = simpleKey( 'z' );
insert( key );
checkValid( 1 );
locate( key, 0, true, dl() );
unindex( key );
checkValid( 0 );
locate( key, 0, false, DiskLoc() );
}
};
class SplitUnevenBucketBase : public Base {
public:
virtual ~SplitUnevenBucketBase() {}
void run() {
for ( int i = 0; i < 10; ++i ) {
BSONObj shortKey = simpleKey( shortToken( i ), 1 );
insert( shortKey );
BSONObj longKey = simpleKey( longToken( i ), 800 );
insert( longKey );
}
checkValid( 20 );
}
protected:
virtual char shortToken( int i ) const = 0;
virtual char longToken( int i ) const = 0;
static char leftToken( int i ) {
return 'a' + i;
}
static char rightToken( int i ) {
return 'z' - i;
}
};
class SplitRightHeavyBucket : public SplitUnevenBucketBase {
private:
virtual char shortToken( int i ) const {
return leftToken( i );
}
virtual char longToken( int i ) const {
return rightToken( i );
}
};
class SplitLeftHeavyBucket : public SplitUnevenBucketBase {
private:
virtual char shortToken( int i ) const {
return rightToken( i );
}
virtual char longToken( int i ) const {
return leftToken( i );
}
};
class MissingLocate : public Base {
public:
void run() {
for ( int i = 0; i < 3; ++i ) {
BSONObj k = simpleKey( 'b' + 2 * i );
insert( k );
}
locate( 1, 'a', 'b', dl() );
locate( 1, 'c', 'd', dl() );
locate( 1, 'e', 'f', dl() );
locate( 1, 'g', 'g' + 1, DiskLoc() ); // of course, 'h' isn't in the index.
// old behavior
// locate( -1, 'a', 'b', dl() );
// locate( -1, 'c', 'd', dl() );
// locate( -1, 'e', 'f', dl() );
// locate( -1, 'g', 'f', dl() );
locate( -1, 'a', 'a' - 1, DiskLoc() ); // of course, 'a' - 1 isn't in the index
locate( -1, 'c', 'b', dl() );
locate( -1, 'e', 'd', dl() );
locate( -1, 'g', 'f', dl() );
}
private:
void locate( int direction, char token, char expectedMatch,
DiskLoc expectedLocation ) {
BSONObj k = simpleKey( token );
int expectedPos = ( expectedMatch - 'b' ) / 2;
Base::locate( k, expectedPos, false, expectedLocation, direction );
}
};
class MissingLocateMultiBucket : public Base {
public:
void run() {
for ( int i = 0; i < 10; ++i ) {
BSONObj k = key( 'b' + 2 * i );
insert( k );
}
BSONObj straddle = key( 'i' );
locate( straddle, 0, false, dl(), 1 );
straddle = key( 'k' );
locate( straddle, 0, false, dl(), -1 );
}
private:
BSONObj key( char c ) {
return simpleKey( c, 800 );
}
};
class All : public UnitTest::Suite {
public:
All() {
add< Create >();
add< SimpleInsertDelete >();
add< SplitRightHeavyBucket >();
add< SplitLeftHeavyBucket >();
add< MissingLocate >();
add< MissingLocateMultiBucket >();
}
};
}
UnitTest::TestPtr btreeTests() {
return UnitTest::createSuite< BtreeTests::All >();
}
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