stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.HybridLogicalClock.Tests/HybridLogicalClockTests.Constructor.cs

@@ -0,0 +1,60 @@
+// <copyright file="HybridLogicalClockTests.Constructor.cs" company="StellaOps">
+// Copyright (c) StellaOps. Licensed under BUSL-1.1.
+// </copyright>
+using FluentAssertions;
+using Xunit;
+
+namespace StellaOps.HybridLogicalClock.Tests;
+
+public sealed partial class HybridLogicalClockTests
+{
+    [Fact]
+    public void Constructor_NullTimeProvider_ThrowsArgumentNullException()
+    {
+        var act = () => new HybridLogicalClock(null!, TestNodeId, new InMemoryHlcStateStore(), _nullLogger);
+
+        act.Should().Throw<ArgumentNullException>()
+            .WithParameterName("timeProvider");
+    }
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void Constructor_InvalidNodeId_ThrowsArgumentException(string? nodeId)
+    {
+        var act = () => new HybridLogicalClock(
+            CreateTimeProvider(),
+            nodeId!,
+            new InMemoryHlcStateStore(),
+            _nullLogger);
+
+        act.Should().Throw<ArgumentException>();
+    }
+
+    [Fact]
+    public void Constructor_NullStateStore_ThrowsArgumentNullException()
+    {
+        var act = () => new HybridLogicalClock(
+            CreateTimeProvider(),
+            TestNodeId,
+            null!,
+            _nullLogger);
+
+        act.Should().Throw<ArgumentNullException>()
+            .WithParameterName("stateStore");
+    }
+
+    [Fact]
+    public void Constructor_NullLogger_ThrowsArgumentNullException()
+    {
+        var act = () => new HybridLogicalClock(
+            CreateTimeProvider(),
+            TestNodeId,
+            new InMemoryHlcStateStore(),
+            null!);
+
+        act.Should().Throw<ArgumentNullException>()
+            .WithParameterName("logger");
+    }
+}