mongodb/jstests/sharding/features2.js

// features2.js

s = new ShardingTest( "features2" , 2 , 1 , 1 );

// The counts and the tests for "on-num-shards" only works for previous assumptions in balancer 
// behavior and assumes migrations do not occur during count() commands.
s.stopBalancer()

s.adminCommand( { enablesharding : "test" } );
s.ensurePrimaryShard('test', 'shard0001');

a = s._connections[0].getDB( "test" );
b = s._connections[1].getDB( "test" );

db = s.getDB( "test" );

// ---- distinct ----

db.foo.save( { x : 1 } );
db.foo.save( { x : 2 } );
db.foo.save( { x : 3 } );
db.foo.ensureIndex( { x : 1 } );

assert.eq( "1,2,3" , db.foo.distinct( "x" ) , "distinct 1" );
assert( a.foo.distinct("x").length == 3 || b.foo.distinct("x").length == 3 , "distinct 2" );
assert( a.foo.distinct("x").length == 0 || b.foo.distinct("x").length == 0 , "distinct 3" );

assert.eq( 1 , s.onNumShards( "foo" ) , "A1" );

s.shardGo( "foo" , { x : 1 } , { x : 2 } , { x : 3 }, null, true /* waitForDelete */ );

assert.eq( 2 , s.onNumShards( "foo" ) , "A2" );

assert.eq( "1,2,3" , db.foo.distinct( "x" ) , "distinct 4" );

// ----- delete ---

assert.eq( 3 , db.foo.count() , "D1" );

db.foo.remove( { x : 3 } );
assert.eq( 2 , db.foo.count() , "D2" );

db.foo.save( { x : 3 } );
assert.eq( 3 , db.foo.count() , "D3" );

db.foo.remove( { x : { $gt : 2 } } );
assert.eq( 2 , db.foo.count() , "D4" );

db.foo.remove( { x : { $gt : -1 } } );
assert.eq( 0 , db.foo.count() , "D5" );

db.foo.save( { x : 1 } );
db.foo.save( { x : 2 } );
db.foo.save( { x : 3 } );
assert.eq( 3 , db.foo.count() , "D6" );
db.foo.remove( {} );
assert.eq( 0 , db.foo.count() , "D7" );

// --- _id key ---

db.foo2.save( { _id : new ObjectId() } );
db.foo2.save( { _id : new ObjectId() } );
db.foo2.save( { _id : new ObjectId() } );

assert.eq( 1 , s.onNumShards( "foo2" ) , "F1" );

printjson( db.foo2.getIndexes() );
s.adminCommand( { shardcollection : "test.foo2" , key : { _id : 1 } } );

assert.eq( 3 , db.foo2.count() , "F2" )
db.foo2.insert( {} );
assert.eq( 4 , db.foo2.count() , "F3" )

// --- map/reduce

db.mr.save( { x : 1 , tags : [ "a" , "b" ] } );
db.mr.save( { x : 2 , tags : [ "b" , "c" ] } );
db.mr.save( { x : 3 , tags : [ "c" , "a" ] } );
db.mr.save( { x : 4 , tags : [ "b" , "c" ] } );
db.mr.ensureIndex( { x : 1 } );

m = function(){
    this.tags.forEach(
        function(z){
            emit( z , { count : 1 } );
        }
    );
};

r = function( key , values ){
    var total = 0;
    for ( var i=0; i<values.length; i++ ){
        total += values[i].count;
    }
    return { count : total };
};

doMR = function( n ){
    print(n);
    
    // on-disk
    
    var res = db.mr.mapReduce( m , r , "smr1_out" );
    printjson( res );
    assert.eq( 4 , res.counts.input , "MR T0 " + n );

    var x = db[res.result];
    assert.eq( 3 , x.find().count() , "MR T1 " + n );
    
    var z = {};
    x.find().forEach( function(a){ z[a._id] = a.value.count; } );
    assert.eq( 3 , Object.keySet( z ).length , "MR T2 " + n );
    assert.eq( 2 , z.a , "MR T3 " + n );
    assert.eq( 3 , z.b , "MR T4 " + n );
    assert.eq( 3 , z.c , "MR T5 " + n );

    x.drop();

    // inline

    var res = db.mr.mapReduce( m , r , { out : { inline : 1 } } );
    printjson( res );
    assert.eq( 4 , res.counts.input , "MR T6 " + n );

    var z = {};
    res.find().forEach( function(a){ z[a._id] = a.value.count; } );
    printjson( z );
    assert.eq( 3 , Object.keySet( z ).length , "MR T7 " + n ) ;
    assert.eq( 2 , z.a , "MR T8 " + n );
    assert.eq( 3 , z.b , "MR T9 " + n );
    assert.eq( 3 , z.c , "MR TA " + n );

}

doMR( "before" );

assert.eq( 1 , s.onNumShards( "mr" ) , "E1" );
s.shardGo( "mr" , { x : 1 } , { x : 2 } , { x : 3 }, null, true /* waitForDelete */ );
assert.eq( 2 , s.onNumShards( "mr" ) , "E1" );

doMR( "after" );

s.adminCommand({split:'test.mr' , middle:{x:3}} );
s.adminCommand({split:'test.mr' , middle:{x:4}} );
s.adminCommand({movechunk:'test.mr', find:{x:3}, to: s.getServer('test').name } );

doMR( "after extra split" );

cmd = { mapreduce : "mr" , map : "emit( " , reduce : "fooz + " , out : "broken1" };

x = db.runCommand( cmd );
y = s._connections[0].getDB( "test" ).runCommand( cmd );

printjson( x )
printjson( y )

// count

db.countaa.save({"regex" : /foo/i})
db.countaa.save({"regex" : /foo/i})
db.countaa.save({"regex" : /foo/i})
assert.eq( 3 , db.countaa.count() , "counta1" );
assert.eq( 3 , db.countaa.find().itcount() , "counta1" );

x = null; y = null;
try {
    x = db.runCommand( "forceerror" )
}
catch ( e ){
    x = e;
}
try {
    y = s._connections[0].getDB( "test" ).runCommand( "forceerror" );
}
catch ( e ){
    y = e;
}

// As the forceerror command is written, it doesnt set a code in the reply.
// OP_COMMAND changes will add a code of 121 (CommandFailed) if a failing command
// does not set one, so this comparison fails as "undefined" != 121.
//
// TODO: Uncomment this line when OP_COMMAND is implemented in mongos (SERVER-18292)
// as then MongoS should set code 121 as well.
//
// assert.eq( x.code , y.code , "assert format" )
assert.eq( x.errmsg , y.errmsg , "assert format" )
assert.eq( x.ok , y.ok , "assert format" )

// isMaster and query-wrapped-command
isMaster = db.runCommand({isMaster:1});
assert( isMaster.ismaster );
assert.eq( 'isdbgrid', isMaster.msg );
delete isMaster.localTime;

im2 = db.runCommand({query: {isMaster:1}});
delete im2.localTime;
assert.eq( isMaster, im2 );

im2 = db.runCommand({$query: {isMaster:1}});
delete im2.localTime;
assert.eq( isMaster, im2 );

s.stop();