description: "Record max setVersion, even from primary without electionId"

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

phases: [

    # Primary A has electionId and setVersion, tells us about B.
    {
        responses: [
            ["a:27017", {
                ok: 1,
                helloOk: true,
                isWritablePrimary: true,
                hosts: ["a:27017", "b:27017"],
                setName: "rs",
                setVersion: 1,
                electionId: {"$oid": "000000000000000000000001"},
                minWireVersion: 0,
                maxWireVersion: 17
            }]
        ],

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

    # Reconfig, B reports as primary, B is missing the electionId but reports setVersion
    {
        responses: [
            ["b:27017", {
                ok: 1,
                helloOk: true,
                isWritablePrimary: true,
                hosts: ["a:27017", "b:27017"],
                setName: "rs",
                setVersion: 2,
                minWireVersion: 0,
                maxWireVersion: 17
            }]
        ],

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

    # A reports as primary, A has been reelection (electionId greater than our recorded maxElectionId).
    # A's setVersion is less than our maxSetVersion, but electionId takes precedence so B's primary claim is ignored
    {
        responses: [
            ["a:27017", {
                ok: 1,
                helloOk: true,
                isWritablePrimary: true,
                hosts: ["a:27017", "b:27017"],
                setName: "rs",
                setVersion: 1,
                electionId: {"$oid": "000000000000000000000002"},
                minWireVersion: 0,
                maxWireVersion: 17
            }]
        ],
        outcome: {
            servers: {
                "a:27017": {
                    type: "RSPrimary",
                    setName: "rs",
                    setVersion: 1,
                    electionId: {"$oid": "000000000000000000000002"}
                },
                "b:27017":{
                    type: "Unknown",
                    setName: ,
                    electionId:
                }
            },
            topologyType: "ReplicaSetWithPrimary",
            logicalSessionTimeoutMinutes: null,
            setName: "rs",
            maxSetVersion: 1,
            maxElectionId: {"$oid": "000000000000000000000002"},
        }
    }
]