Joseph Doherty
39 lines
1.8 KiB
C#
39 lines
1.8 KiB
C#
using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.Commons.Messages.Redundancy;
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using ZB.MOM.WW.OtOpcUa.Runtime.Drivers;
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namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Drivers;
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/// <summary>
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/// archreview 03/S4 — the single Primary data-plane gate decision. A KNOWN role wins outright; an
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/// UNKNOWN role (no snapshot yet, or the snapshot never mentioned this node) is resolved by cluster
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/// membership: a single-driver cluster stays default-ALLOW (boot-window / single-node posture), a
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/// multi-driver cluster is default-DENY (a real Primary peer exists — don't touch the shared field
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/// device until the snapshot proves this node is Primary).
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/// </summary>
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public sealed class PrimaryGatePolicyTests
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{
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[Theory]
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// Primary → always service, regardless of member count.
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[InlineData(RedundancyRole.Primary, 0, true)]
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[InlineData(RedundancyRole.Primary, 1, true)]
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[InlineData(RedundancyRole.Primary, 2, true)]
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// Secondary / Detached → never service, regardless of member count.
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[InlineData(RedundancyRole.Secondary, 0, false)]
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[InlineData(RedundancyRole.Secondary, 2, false)]
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[InlineData(RedundancyRole.Detached, 0, false)]
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[InlineData(RedundancyRole.Detached, 2, false)]
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public void Known_role_wins_regardless_of_member_count(RedundancyRole role, int members, bool expected)
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=> PrimaryGatePolicy.ShouldServiceAsPrimary(role, members).ShouldBe(expected);
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[Theory]
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// Unknown role: allow only when no driver peer exists (count <= 1).
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[InlineData(0, true)]
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[InlineData(1, true)]
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[InlineData(2, false)]
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[InlineData(3, false)]
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public void Unknown_role_resolves_by_membership(int members, bool expected)
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=> PrimaryGatePolicy.ShouldServiceAsPrimary(null, members).ShouldBe(expected);
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}
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