/**
 * This tests the basic cases for implicit database creation in a sharded cluster.
 */
(function() {
"use strict";

var st = new ShardingTest({ shards: 2 });
var configDB = st.s.getDB('config');

assert.eq(null, configDB.databases.findOne());

var testDB = st.s.getDB('test');

// Test that reads will not result into a new config.databases entry.
assert.eq(null, testDB.user.findOne());
assert.eq(null, configDB.databases.findOne({ _id: 'test' }));

assert.writeOK(testDB.user.insert({ x: 1 }));

var testDBDoc = configDB.databases.findOne();
assert.eq('test', testDBDoc._id, tojson(testDBDoc));

// Test that inserting to another collection in the same database will not modify the existing
// config.databases entry.
assert.writeOK(testDB.bar.insert({ y: 1 }));
assert.eq(testDBDoc, configDB.databases.findOne());

st.s.adminCommand({ enableSharding: 'foo' });
var fooDBDoc = configDB.databases.findOne({ _id: 'foo' });

assert.neq(null, fooDBDoc);
assert(fooDBDoc.partitioned);

var newShardConn = MongoRunner.runMongod({});
var unshardedDB = newShardConn.getDB('unshardedDB');

unshardedDB.user.insert({ z: 1 });

assert.commandWorked(st.s.adminCommand({ addShard: newShardConn.name }));

assert.neq(null, configDB.databases.findOne({ _id: 'unshardedDB' }));

MongoRunner.stopMongod(newShardConn.port);
st.stop();

})();