e55bd46ca1
A heartbeat-registered site that has never sent a full report now has
LastReportReceivedAt = null instead of the year-0001 sentinel. TimestampDisplay
accepts DateTimeOffset? and renders null as a placeholder ('awaiting first
report') rather than a ~2000-year-stale date. Cross-module: HealthMonitoring +
CentralUI.
51 lines
1.9 KiB
C#
51 lines
1.9 KiB
C#
using Bunit;
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using ScadaLink.CentralUI.Components.Shared;
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namespace ScadaLink.CentralUI.Tests.Shared;
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/// <summary>
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/// Regression tests for HealthMonitoring-015. A heartbeat-only registered site has
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/// a <c>null</c> <c>LastReportReceivedAt</c> ("no full report yet"). The health
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/// dashboard passes that value straight into <see cref="TimestampDisplay"/>, so the
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/// component's <c>Value</c> must accept <c>DateTimeOffset?</c> and render a
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/// <c>null</c> as a human-readable placeholder ("never") instead of the
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/// <c>DateTimeOffset.MinValue</c> year-0001 sentinel. Non-null callers must keep
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/// rendering the formatted timestamp exactly as before.
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/// </summary>
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public class TimestampDisplayTests : BunitContext
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{
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[Fact]
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public void Render_NonNullValue_ShowsFormattedTimestamp()
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{
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var value = new DateTimeOffset(2026, 5, 17, 14, 30, 45, TimeSpan.Zero);
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var cut = Render<TimestampDisplay>(parameters => parameters
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.Add(p => p.Value, (DateTimeOffset?)value)
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.Add(p => p.Format, "HH:mm:ss"));
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var span = cut.Find("span");
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Assert.Equal(value.LocalDateTime.ToString("HH:mm:ss"), span.TextContent.Trim());
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Assert.Contains("2026-05-17 14:30:45 UTC", span.GetAttribute("title")!);
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}
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[Fact]
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public void Render_NullValue_ShowsNeverPlaceholder()
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{
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var cut = Render<TimestampDisplay>(parameters => parameters
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.Add(p => p.Value, (DateTimeOffset?)null)
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.Add(p => p.Format, "HH:mm:ss"));
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Assert.Contains("never", cut.Markup, StringComparison.OrdinalIgnoreCase);
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}
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[Fact]
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public void Render_NullValue_DoesNotRenderYear0001Sentinel()
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{
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var cut = Render<TimestampDisplay>(parameters => parameters
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.Add(p => p.Value, (DateTimeOffset?)null));
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// The year-0001 DateTimeOffset.MinValue sentinel must never reach the UI.
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Assert.DoesNotContain("0001", cut.Markup);
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}
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}
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