/// <summary>
/// Assert that the cluster has elected the correct leader
/// out of all nodes in the cluster. First
/// member in the cluster ring is expected leader.
///
/// Note that this can only be used for a cluster with all members
/// in Up status, i.e. use `awaitMembersUp` before using this method.
/// The reason for that is that the cluster leader is preferably a
/// member with status Up or Leaving and that information can't
/// be determined from the `RoleName`.
/// </summary>
public void AssertLeaderIn(ImmutableList <RoleName> nodesInCluster)
{
if (!nodesInCluster.Contains(Myself))
{
return;
}
_assertions.AssertTrue(nodesInCluster.Count != 0, "nodesInCluster must not be empty");
var expectedLeader = RoleOfLeader(nodesInCluster);
var leader = ClusterView.Leader;
var isLeader = leader == ClusterView.SelfAddress;
_assertions.AssertTrue(isLeader == IsNode(expectedLeader), "expected leader {0}, got leader {1}, members{2}", expectedLeader, leader, ClusterView.Members);
_assertions.AssertTrue(ClusterView.Status == MemberStatus.Up ||
ClusterView.Status == MemberStatus.Leaving,
"Expected cluster view status Up or Leaving but got {0}", ClusterView.Status);
}
