Joseph Doherty
78 lines
3.3 KiB
C#
78 lines
3.3 KiB
C#
using Akka.Cluster;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Diagnostics.HealthChecks;
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using ZB.MOM.WW.Health.Akka;
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namespace ZB.MOM.WW.Health.Akka.Tests;
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/// <summary>
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/// Table-driven tests for the pure status-mapping function inside <see cref="AkkaClusterStatusPolicy"/>.
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/// The two presets (<see cref="AkkaClusterStatusPolicy.Default"/> and
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/// <see cref="AkkaClusterStatusPolicy.OtOpcUaCompat"/>) are the convergence targets for ScadaBridge
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/// and OtOpcUa respectively; every <see cref="MemberStatus"/> is exercised so a drift in either
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/// preset fails loudly. Also covers the startup-safety null-guard on <see cref="AkkaClusterHealthCheck"/>.
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/// </summary>
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public sealed class AkkaClusterStatusPolicyTests
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{
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public static IEnumerable<object[]> DefaultCases() => new[]
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{
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new object[] { MemberStatus.Up, HealthStatus.Healthy },
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new object[] { MemberStatus.Joining, HealthStatus.Healthy },
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new object[] { MemberStatus.Leaving, HealthStatus.Degraded },
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new object[] { MemberStatus.Exiting, HealthStatus.Degraded },
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new object[] { MemberStatus.WeaklyUp, HealthStatus.Unhealthy },
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new object[] { MemberStatus.Down, HealthStatus.Unhealthy },
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new object[] { MemberStatus.Removed, HealthStatus.Unhealthy },
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new object[] { (MemberStatus)99, HealthStatus.Unhealthy }, // unknown / future status
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};
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[Theory]
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[MemberData(nameof(DefaultCases))]
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public void Default_MapsEveryStatus(MemberStatus status, HealthStatus expected)
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{
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Assert.Equal(expected, AkkaClusterStatusPolicy.Default.Evaluate(status));
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}
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public static IEnumerable<object[]> OtOpcUaCompatCases() => new[]
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{
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new object[] { MemberStatus.Up, HealthStatus.Healthy },
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new object[] { MemberStatus.Joining, HealthStatus.Degraded },
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new object[] { MemberStatus.Leaving, HealthStatus.Degraded },
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new object[] { MemberStatus.Exiting, HealthStatus.Degraded },
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new object[] { MemberStatus.WeaklyUp, HealthStatus.Degraded },
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new object[] { MemberStatus.Down, HealthStatus.Degraded },
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new object[] { MemberStatus.Removed, HealthStatus.Degraded },
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new object[] { (MemberStatus)99, HealthStatus.Degraded }, // unknown / future status
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};
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[Theory]
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[MemberData(nameof(OtOpcUaCompatCases))]
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public void OtOpcUaCompat_OnlyUpIsHealthy(MemberStatus status, HealthStatus expected)
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{
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Assert.Equal(expected, AkkaClusterStatusPolicy.OtOpcUaCompat.Evaluate(status));
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}
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[Fact]
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public void CustomPolicy_UsesSuppliedFunc()
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{
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var policy = new AkkaClusterStatusPolicy(_ => HealthStatus.Unhealthy);
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Assert.Equal(HealthStatus.Unhealthy, policy.Evaluate(MemberStatus.Up));
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}
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[Fact]
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public async Task HealthCheck_NoActorSystem_ReturnsDegraded()
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{
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var provider = new ServiceCollection().BuildServiceProvider();
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var check = new AkkaClusterHealthCheck(provider, AkkaClusterStatusPolicy.Default);
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var result = await check.CheckHealthAsync(NewContext(check));
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Assert.Equal(HealthStatus.Degraded, result.Status);
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}
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private static HealthCheckContext NewContext(IHealthCheck check) => new()
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{
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Registration = new HealthCheckRegistration("akka-cluster", check, HealthStatus.Unhealthy, tags: null),
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};
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}
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