description: When in equilibrium selection is evenly distributed (replica set)
topology_description:
  type: ReplicaSetWithPrimary
  servers:
    - address: a:27017
      avg_rtt_ms: 35
      type: RSPrimary
    - address: b:27017
      avg_rtt_ms: 35
      type: RSSecondary
    - address: c:27017
      avg_rtt_ms: 35
      type: RSSecondary
mocked_topology_state:
  - address: a:27017
    operation_count: 6
  - address: b:27017
    operation_count: 6
  - address: c:27017
    operation_count: 6
iterations: 2000
outcome:
  tolerance: 0.05
  expected_frequencies:
    a:27017: 0.33
    b:27017: 0.33
    c:27017: 0.33