t = db.geo6;
t.drop();

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

assert.eq(0, t.find().itcount(), "pre0");
assert.eq(0, t.find({loc: {$near: [50, 50]}}).itcount(), "pre1");

t.insert({_id: 1, loc: [1, 1]});
t.insert({_id: 2, loc: [1, 2]});
t.insert({_id: 3});

assert.eq(3, t.find().itcount(), "A1");
assert.eq(2, t.find().hint({loc: "2d"}).itcount(), "A2");
assert.eq(2, t.find({loc: {$near: [50, 50]}}).itcount(), "A3");

t.find({loc: {$near: [50, 50]}}).sort({_id: 1}).forEach(printjson);
assert.eq(1, t.find({loc: {$near: [50, 50]}}).sort({_id: 1}).next()._id, "B1");
assert.eq(2, t.find({loc: {$near: [50, 50]}}).sort({_id: -1}).next()._id, "B1");

t.insert({_id: 4, loc: []});
assert.eq(4, t.find().itcount(), "C1");