// Set up a sharding test.                                                                                                             
s = new ShardingTest( "aggregation", 2, 0, 2 );
s.adminCommand( { enablesharding:"test" } );
s.adminCommand( { shardcollection:"test.data", key:{ _id:1 } } );
s.stopBalancer()

d = s.getDB( "test" );
d.data.save( { dollar:false } );

// Currently the shard will get $cond:[ '$dollar', '$1.00', '$.99' ] and treat the second and third arguments as field paths.
result = d.data.aggregate( { $project:{ _id:0, cost:{ $cond:[ '$dollar', { $const:'$1.00' }, { $const:'$.99' } ] } } } );

printjson( result );
assert.eq( [ { cost:'$.99' } ], result.result );

s.stop();