mongo/jstests/sharding/read_does_not_create_namespaces.js

// This test ensures that just attempting to read from a non-existent database or collection won't
// cause entries to be created in the catalog.
(function() {

var shardingTest = new ShardingTest({ name: 'read_does_not_create_namespaces', shards: 1 });
var db = shardingTest.getDB('NonExistentDB');

assert.isnull(db.nonExistentColl.findOne({}));

// Neither the database nor the collection should have been created
assert.isnull(shardingTest.getDB('config').databases.findOne({ _id: 'NonExistentDB' }));
assert.eq(-1, shardingTest.shard0.getDBNames().indexOf('NonExistentDB'));

shardingTest.stop();

})();