Joseph Doherty
b1946194d6
Code review at HEAD 7286d320. Cluster-001 (SeedFromCurrentState reads from one
snapshot), Cluster-003 (HoconLoader double-dispose), Cluster-004 (stale akka.conf
header), Cluster-005 (ServiceLevelCalculator tests added to Cluster.Tests). Cluster-002
deferred (no production caller).
92 lines
3.6 KiB
C#
92 lines
3.6 KiB
C#
using Akka.Cluster;
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using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.Cluster.Redundancy;
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namespace ZB.MOM.WW.OtOpcUa.Cluster.Tests;
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/// <summary>
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/// Unit tests for <see cref="ServiceLevelCalculator"/> — the pure ServiceLevel tiering logic.
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/// Moved from ControlPlane.Tests to Cluster.Tests because the type lives in Core.Cluster.
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/// See code-reviews/Cluster/findings.md Cluster-005.
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/// </summary>
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public sealed class ServiceLevelCalculatorTests
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{
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/// <summary>Non-Up member statuses produce ServiceLevel 0 regardless of other inputs.</summary>
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[Theory]
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[InlineData(MemberStatus.Down)]
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[InlineData(MemberStatus.Removed)]
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[InlineData(MemberStatus.Exiting)]
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[InlineData(MemberStatus.Leaving)]
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public void NotUp_returns_zero(MemberStatus status)
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{
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var sl = ServiceLevelCalculator.Compute(new(status,
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DbReachable: true, OpcUaProbeOk: true, Stale: false, IsDriverRoleLeader: true));
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sl.ShouldBe((byte)0);
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}
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/// <summary>Up + DB reachable + probe ok + not stale + not leader = tier 240 (healthy follower).</summary>
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[Fact]
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public void Fully_healthy_non_leader_returns_240()
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{
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var sl = ServiceLevelCalculator.Compute(new(MemberStatus.Up,
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DbReachable: true, OpcUaProbeOk: true, Stale: false, IsDriverRoleLeader: false));
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sl.ShouldBe((byte)240);
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}
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/// <summary>Up + DB reachable + probe ok + not stale + is leader = tier 250 (healthy leader, +10 bonus).</summary>
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[Fact]
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public void Fully_healthy_role_leader_returns_250()
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{
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var sl = ServiceLevelCalculator.Compute(new(MemberStatus.Up,
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DbReachable: true, OpcUaProbeOk: true, Stale: false, IsDriverRoleLeader: true));
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sl.ShouldBe((byte)250);
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}
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/// <summary>DB reachable but data stale = tier 200 (stale).</summary>
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[Fact]
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public void Db_reachable_but_stale_returns_200()
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{
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var sl = ServiceLevelCalculator.Compute(new(MemberStatus.Up,
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DbReachable: true, OpcUaProbeOk: true, Stale: true, IsDriverRoleLeader: false));
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sl.ShouldBe((byte)200);
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}
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/// <summary>DB unreachable AND stale = tier 100 (critically degraded).</summary>
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[Fact]
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public void Db_unreachable_and_stale_returns_100()
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{
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var sl = ServiceLevelCalculator.Compute(new(MemberStatus.Up,
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DbReachable: false, OpcUaProbeOk: false, Stale: true, IsDriverRoleLeader: false));
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sl.ShouldBe((byte)100);
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}
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/// <summary>OPC UA probe failed while not stale falls through to the catch-all 0.</summary>
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[Fact]
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public void Opcua_probe_fail_when_not_stale_returns_zero()
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{
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var sl = ServiceLevelCalculator.Compute(new(MemberStatus.Up,
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DbReachable: true, OpcUaProbeOk: false, Stale: false, IsDriverRoleLeader: false));
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sl.ShouldBe((byte)0);
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}
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/// <summary>Joining is treated identically to Up for grading (node is joining the cluster).</summary>
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[Fact]
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public void Joining_member_is_treated_like_Up()
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{
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var sl = ServiceLevelCalculator.Compute(new(MemberStatus.Joining,
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DbReachable: true, OpcUaProbeOk: true, Stale: false, IsDriverRoleLeader: false));
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sl.ShouldBe((byte)240);
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}
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/// <summary>Leader bonus is clamped to 255 even if a hypothetical basis would overflow.</summary>
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[Fact]
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public void Result_is_clamped_to_255()
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{
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// basis 240 + 10 = 250, already within byte range; confirms Clamp is in path
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var sl = ServiceLevelCalculator.Compute(new(MemberStatus.Up,
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DbReachable: true, OpcUaProbeOk: true, Stale: false, IsDriverRoleLeader: true));
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((int)sl).ShouldBeLessThanOrEqualTo(255);
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}
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}
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