// SERVER-6184 Support mixing nested and dotted fields with common prefixes

c = db.c;
c.drop();

c.save( { a:'missing', b:{ c:'bar', a: 'baz', z:'not there' } } );

function test(projection) {
    res = c.aggregate({$project: projection})
    assert.eq(res.toArray()[0], {b: {c: 'bar', a: 'baz'}});
}

test({_id:0, b: {a:1}, 'b.c': 1})
test({_id:0, 'b.c': 1, b: {a:1}})

// Synthetic fields should be in the order they appear in the $project

one = {$add:[1]}
res = c.aggregate({$project: {_id:0, 'A.Z':one, A:{Y:one, A:one}, 'A.B': one}})
assert.eq(res.toArray()[0], {A: {Z:1, Y:1, A:1, B:1}});