GroupMod:
  GroupModMissing:
    message:
      header:
        version: 4
        type: OFPT_GROUP_MOD
        length: 8
        xid: 0
    expectation: false
    description: GroupMod missing fields
  GroupMod:
    message:
      header:
        version: 4
        type: OFPT_GROUP_MOD
        length: 8
        xid: 0
      command: OFPGC_ADD
      type: OFPGT_ALL
      group_id: 0
    expectation: true
    description: GroupMod message
  GroupModBucket:
    message:
      header:
        version: 4
        type: OFPT_GROUP_MOD
        length: 8
        xid: 0
      command: OFPGC_ADD
      type: OFPGT_ALL
      group_id: 0
      buckets:
        - len: 0
          weight: 0
          watch_port: 0
          watch_group: 0
          actions:
            type: OFPAT_OUTPUT
            len: 0
    expectation: true
    description: GroupMod message with bucket