mongodb/jstests/geo_box1.js

t = db.geo_box1;
t.drop();

num = 0;
for ( x=0; x<=20; x++ ){
    for ( y=0; y<=20; y++ ){
        o = { _id : num++ , loc : [ x , y ] } 
        t.save( o )
    }
}

t.ensureIndex( { loc : "2d" } );

searches = [
    [ [ 1 , 2 ] , [ 4 , 5 ] ] ,
    [ [ 1 , 1 ] , [ 2 , 2 ] ] ,
    [ [ 0 , 2 ] , [ 4 , 5 ] ] ,
    [ [ 1 , 1 ] , [ 2 , 8 ] ] ,
];


for ( i=0; i<searches.length; i++ ){
    b = searches[i];
    //printjson( b );
    
    q = { loc : { $within : { $box : b } } }
    numWanetd = ( 1 + b[1][0] - b[0][0] ) * ( 1 + b[1][1] - b[0][1] );
    assert.eq( numWanetd  , t.find(q).itcount() , "itcount: " + q );
    printjson( t.find(q).explain() )
}