mongodb/jstests/geod.js

var t=db.geod;
t.drop() 
t.save( { loc: [0,0] } )
t.save( { loc: [0.5,0] } )
t.ensureIndex({loc:"2d"})
// do a few geoNears with different maxDistances.  The first iteration
// should match no points in the dataset.
dists = [.49, .51, 1.0]
for (idx in dists){
    b=db.runCommand({geoNear:"geod", near:[1,0], num:2, maxDistance:dists[idx]});
    assert.eq(b.errmsg, undefined, "A"+idx);
    l=b.results.length
    assert.eq(l, idx, "B"+idx)    
}