// Check that shard selection does not assert for certain unsatisfiable queries.
// SERVER-4554, SERVER-4914

s = new ShardingTest( 'shard7', 2, 0, 1 );

db = s.admin._mongo.getDB( 'test' );
c = db[ 'foo' ];
c.drop();

s.adminCommand( { enablesharding: '' + db } );
s.adminCommand( { shardcollection: '' + c, key: { a:1,b:1 } } );

// Check query operation with some satisfiable and unsatisfiable queries.

assert.eq( 0, c.find({a:1}).itcount() );
assert.eq( 0, c.find({a:1,b:1}).itcount() );
assert.eq( 0, c.find({a:{$gt:4,$lt:2}}).itcount() );
assert.eq( 0, c.find({a:1,b:{$gt:4,$lt:2}}).itcount() );
assert.eq( 0, c.find({a:{$gt:0,$lt:2},b:{$gt:4,$lt:2}}).itcount() );
assert.eq( 0, c.find({b:{$gt:4,$lt:2}}).itcount() );
assert.eq( 0, c.find({a:{$in:[]}}).itcount() );
assert.eq( 0, c.find({a:1,b:{$in:[]}}).itcount() );

assert.eq( 0, c.find({$or:[{a:{$gt:0,$lt:10}},{a:12}]}).itcount() );
assert.eq( 0, c.find({$or:[{a:{$gt:0,$lt:10}},{a:5}]}).itcount() );
assert.eq( 0, c.find({$or:[{a:1,b:{$gt:0,$lt:10}},{a:1,b:5}]}).itcount() );

// Check other operations that use getShardsForQuery.

unsatisfiable = {a:1,b:{$gt:4,$lt:2}};

assert.eq( 0, c.count(unsatisfiable) );
assert.eq( [], c.distinct('a',unsatisfiable) );

aggregate = c.aggregate( { $match:unsatisfiable } );
assert.eq( 0, aggregate.toArray().length );

c.save( {a:null,b:null} );
c.save( {a:1,b:1} );
c.remove( unsatisfiable );
assert( !db.getLastError() );
assert.eq( 2, c.count() );
c.update( unsatisfiable, {$set:{c:1}}, false, true );
assert( !db.getLastError() );
assert.eq( 2, c.count() );
assert.eq( 0, c.count( {c:1} ) );

c.ensureIndex( {loc:'2d'} );
c.save( {a:2,b:2,loc:[0,0]} );
near = db.runCommand( {geoNear:'foo', near:[0,0], query:unsatisfiable} );
assert.commandWorked( near );
assert.eq( 0, near.results.length );