description: "New primary with greater setVersion and electionId"

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

phases: [

    # Primary A is discovered and tells us about B.
    {
        responses: [
            ["a:27017", {
                ok: 1,
                ismaster: true,
                hosts: ["a:27017", "b:27017"],
                setName: "rs",
                setVersion: 1,
                electionId: {"$oid": "000000000000000000000001"}
            }]
        ],

        outcome: {
            servers: {
                "a:27017": {
                    type: "RSPrimary",
                    setName: "rs",
                    setVersion: 1,
                    electionId: {"$oid": "000000000000000000000001"}
                },
                "b:27017": {
                    type: "Unknown",
                    setName: ,
                    electionId:
                }
            },
            topologyType: "ReplicaSetWithPrimary",
            setName: "rs",
        }
    },

    # B is elected.
    {
        responses: [
            ["b:27017", {
                ok: 1,
                ismaster: true,
                hosts: ["a:27017", "b:27017"],
                setName: "rs",
                setVersion: 1,
                electionId: {"$oid": "000000000000000000000002"}
            }]
        ],

        outcome: {
            servers: {
                "a:27017": {
                    type: "Unknown",
                    setName: ,
                    electionId:
                },
                "b:27017": {
                    type: "RSPrimary",
                    setName: "rs",
                    setVersion: 1,
                    electionId: {"$oid": "000000000000000000000002"}
                }
            },
            topologyType: "ReplicaSetWithPrimary",
            setName: "rs",
        }
    },

    # A still claims to be primary but it's ignored.
    {
        responses: [
            ["a:27017", {
                ok: 1,
                ismaster: true,
                hosts: ["a:27017", "b:27017"],
                setName: "rs",
                setVersion: 1,
                electionId: {"$oid": "000000000000000000000001"}
            }]
        ],
        outcome: {
            servers: {
                "a:27017": {
                    type: "Unknown",
                    setName: ,
                    electionId:
                },
                "b:27017": {
                    type: "RSPrimary",
                    setName: "rs",
                    setVersion: 1,
                    electionId: {"$oid": "000000000000000000000002"}
                }
            },
            topologyType: "ReplicaSetWithPrimary",
            setName: "rs",
        }
    }
]