mongo/jstests/core/sort2.js

// test sorting, mainly a test ver simple with no index

t = db.sort2;

t.drop();
t.save({x:1, y:{a:5,b:4}});
t.save({x:1, y:{a:7,b:3}});
t.save({x:1, y:{a:2,b:3}});
t.save({x:1, y:{a:9,b:3}});
for( var pass = 0; pass < 2; pass++ ) {
    var res = t.find().sort({'y.a':1}).toArray();
    assert( res[0].y.a == 2 );
    assert( res[1].y.a == 5 );
    assert( res.length == 4 );
    t.ensureIndex({"y.a":1});
}
assert(t.validate().valid);

t.drop();
t.insert({ x: 1 })
t.insert({ x: 5000000000 })
t.insert({ x: NaN });
t.insert({ x: Infinity });
t.insert({ x: -Infinity });
var good = [NaN, -Infinity, 1, 5000000000, Infinity];
for (var pass = 0; pass < 2; pass++) {
    var res = t.find({}, { _id: 0 }).sort({ x: 1 }).toArray();
    for (var i = 0; i < good.length; i++) {
        assert(good[i].toString() == res[i].x.toString());
    }
    t.ensureIndex({ x : 1 });
}