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path: root/jstests/validate_cmd_ns.js
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/**
 * Tests that query against the $cmd namespace will error out when the request has
 * a number to return value other than 1 or -1. Note that users cannot have
 * collections named $cmd since $ is an illegal character.
 */

// Note: _exec gives you the raw response from the server.
var res = db.$cmd.find({ whatsmyuri: 1 })._exec().next();
assert(res.$err != null);
assert(res.$err.indexOf('bad numberToReturn') > -1);

res = db.$cmd.find({ whatsmyuri: 1 }).limit(0)._exec().next();
assert(res.$err != null);
assert(res.$err.indexOf('bad numberToReturn') > -1);

res = db.$cmd.find({ whatsmyuri: 1 }).limit(-2)._exec().next();
assert(res.$err != null);
assert(res.$err.indexOf('bad numberToReturn') > -1);

var res = db.$cmd.find({ whatsmyuri: 1 }).limit(1).next();
assert(res.ok);

res = db.$cmd.find({ whatsmyuri: 1 }).limit(-1).next();
assert(res.ok);