// 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.writeOK(col.save({ a: "test" }, { writeConcern: { w: 'majority' }}));