Joseph Doherty
348ffaec1c
OnSnapshotChanged used to re-project every cluster group and re-render the whole page for each driver publish, per open tab. It now only marks a CoalescingDirtyFlag; the 5 s tick rebuilds when the flag is set or the config load changed (or evicted) anything. Refs #745 Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
54 lines
1.6 KiB
C#
54 lines
1.6 KiB
C#
using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.AdminUI.Hosts;
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namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests.Hosts;
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/// <summary>
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/// R04 P4: a driver health publish only marks <c>/hosts</c> dirty; the page's 5 s tick rebuilds and
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/// renders at most once, however many publishes arrived.
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/// </summary>
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[Trait("Category", "Unit")]
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public sealed class HostsRenderCoalescingTests
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{
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[Fact]
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public void Many_marks_coalesce_into_one_consume()
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{
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var flag = new CoalescingDirtyFlag();
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for (var i = 0; i < 200; i++) flag.Mark();
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flag.TryConsume().ShouldBeTrue();
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flag.TryConsume().ShouldBeFalse();
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}
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[Fact]
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public void A_fresh_flag_is_clean_and_a_mark_after_consume_is_seen()
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{
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var flag = new CoalescingDirtyFlag();
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flag.TryConsume().ShouldBeFalse();
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// Positive control: the flag is not stuck clean.
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flag.Mark();
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flag.TryConsume().ShouldBeTrue();
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}
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[Fact]
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public void Concurrent_marks_are_never_lost()
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{
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var flag = new CoalescingDirtyFlag();
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Parallel.For(0, 1000, _ => flag.Mark());
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flag.TryConsume().ShouldBeTrue();
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}
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/// <summary>Source pin (no bUnit): the snapshot handler must not render or rebuild.</summary>
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[Fact]
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public void Snapshot_handler_only_marks_and_the_tick_consumes()
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{
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var src = AdminUiSource.Read("Components", "Pages", "Hosts.razor");
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src.ShouldContain("private void OnSnapshotChanged(DriverHealthChanged _) => _driversDirty.Mark();");
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src.ShouldContain("if (_driversDirty.TryConsume() | configChanged) RebuildDriverGroups();");
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}
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}
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