description: "Unexpected mongos"

uri: "mongodb://b/?replicaSet=rs"

phases: [

    {
        responses: [

                ["b:27017", {

                    ok: 1,
                    helloOk: true,
                    isWritablePrimary: true,
                    msg: "isdbgrid",
                    minWireVersion: 0,
                    maxWireVersion: 6
                }]
        ],

        outcome: {

            servers: {},
            topologyType: "ReplicaSetNoPrimary",
            logicalSessionTimeoutMinutes: null,
            setName: "rs"
        }
    }
]