(function() {
    'use strict';
    var checkCollectionExists = function(coll) {
        var collArray = coll.getDB().runCommand("listCollections").cursor.firstBatch;
        var colls = collArray.filter(function(spec) { return spec.name === coll.getName(); });
        assert.eq(1, colls.length, tojson(collArray));
    }

    var st = new ShardingTest({shards: 2});
    var mongos = st.s;
    var configDb = st.s.getDB("config");
    var shard0 = st.shard0.shardName;
    var shard1 = st.shard1.shardName;
    var coll = mongos.getCollection('test.list_collections');

    assert.commandWorked(mongos.adminCommand({ enableSharding: coll.getDB() + ""}));
    assert.commandWorked(
        mongos.adminCommand({ shardCollection: coll + "", key: { "x" : 1 }}));

    jsTestLog("insert a single document into mycoll");
    assert.writeOK(coll.insert({ "x" : 1 }));
    checkCollectionExists(coll);

    jsTestLog("check that primary shard is " + shard0 + " then moving primary to " + shard1);
    assert.eq(1, configDb.databases.count({ "_id" : coll.getDB().getName(), "primary" : shard0 }));
    assert.commandWorked(mongos.adminCommand({ movePrimary: coll.getDB().getName(), to: shard1}));
    checkCollectionExists(coll);

    st.stop();
})();