// This test checks that w:"majority" works correctly on a lone mongod // set up a mongod and connect var mongod = MongoRunner.runMongod({}); // get db and collection, then perform a trivial insert db = mongod.getDB("test"); col = db.getCollection("single_server_majority"); col.drop(); // see if we can get a majority write on this single server assert.commandWorked(col.save({a: "test"}, {writeConcern: {w: 'majority'}})); MongoRunner.stopMongod(mongod);