public void ShouldDownRemoteOldestWhenOldestAndAlone()
{
var oldest = TestUtils.CreateMembers(MemberStatus.Up).First();
var rest = TestUtils.CreateMembers(MemberStatus.Up)
.Take(4)
.ToImmutableSortedSet();
var members = rest.Add(oldest);
var unreachable = ImmutableHashSet <Member> .Empty.Add(oldest);
var state = new CurrentClusterState().Copy(members, unreachable);
var strategy = new KeepOldestDowningStrategy(downIfAlone: true);
var victims = strategy.GetVictims(state);
victims.ToImmutableHashSet().SetEquals(ImmutableHashSet <Member> .Empty.Add(oldest))
.Should().BeTrue("When downIfAlone=true, we should down the oldest member if its clustered by itself");
}
public void ShouldDownSelfWhenNotInOldestPartition()
{
var oldest = TestUtils.CreateMembers(MemberStatus.Up).First();
var members = TestUtils.CreateMembers(MemberStatus.Up)
.Take(4)
.ToImmutableSortedSet()
.Add(oldest);
var unreachable = ImmutableHashSet <Member> .Empty.Add(oldest);
var state = new CurrentClusterState().Copy(members, unreachable);
var strategy = new KeepOldestDowningStrategy();
var victims = strategy.GetVictims(state);
victims.ToImmutableHashSet().SetEquals(members)
.Should().BeTrue("When we don't have the oldest node, down ourselves");
}
public void ShouldDownUnreachablesInOldestPartition()
{
var oldest = TestUtils.CreateMembers(MemberStatus.Up)
.Take(3)
.ToImmutableSortedSet();
var newest = TestUtils.CreateMembers(MemberStatus.Up)
.Take(2)
.ToImmutableSortedSet();
var members = oldest.Union(newest);
var unreachable = newest.ToImmutableHashSet();
var state = new CurrentClusterState().Copy(members, unreachable);
var strategy = new KeepOldestDowningStrategy();
var victims = strategy.GetVictims(state);
victims.ToImmutableHashSet().SetEquals(unreachable)
.Should().BeTrue("When we have the oldest node, the unreachable nodes should be downed");
}
public void ShouldDownUnreachableWhenNoOldest()
{
var oldest = TestUtils.CreateMembers(MemberStatus.Up)
.Take(3)
.ToImmutableSortedSet();
var members = TestUtils.CreateMembers(MemberStatus.Up)
.Take(5)
.ToImmutableSortedSet();
var unreachable = members.Take(2).ToImmutableHashSet();
var state = new CurrentClusterState().Copy(members, unreachable);
//There will be no oldest when constrained to this role
var strategy = new KeepOldestDowningStrategy(role: "SomeRole");
var victims = strategy.GetVictims(state);
victims.ToImmutableHashSet().SetEquals(unreachable)
.Should().BeTrue("When there isn't an oldest node, the unreachable nodes should be downed");
}