From de6236b9ea322f6f961e99b7555c087e51986aca Mon Sep 17 00:00:00 2001
From: Kevin Hahn <kevin_hahn@sil.org>
Date: Mon, 2 Sep 2024 16:28:49 +0700
Subject: [PATCH] add HybridDateTimeTests.cs

---
 .../Core/HybridDateTimeTests.cs               | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 src/SIL.Harmony.Tests/Core/HybridDateTimeTests.cs

diff --git a/src/SIL.Harmony.Tests/Core/HybridDateTimeTests.cs b/src/SIL.Harmony.Tests/Core/HybridDateTimeTests.cs
new file mode 100644
index 0000000..9c5a16a
--- /dev/null
+++ b/src/SIL.Harmony.Tests/Core/HybridDateTimeTests.cs
@@ -0,0 +1,77 @@
+using SIL.Harmony.Core;
+
+namespace SIL.Harmony.Tests.Core;
+
+public class HybridDateTimeTests
+{
+    [Fact]
+    public void Equals_TrueWhenTheSame()
+    {
+        var dateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+        var otherDateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+
+        (dateTime == otherDateTime).Should().BeTrue();
+    }
+    
+    [Fact]
+    public void Equals_FalseWhenDifferentDateTime()
+    {
+        var dateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+        var otherDateTime = new HybridDateTime(new DateTimeOffset(2001, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+
+        (dateTime != otherDateTime).Should().BeTrue();
+    }
+    
+    [Fact]
+    public void Equals_FalseWhenDifferentCounter()
+    {
+        var dateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+        var otherDateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 1);
+
+        dateTime.Should().NotBe(otherDateTime);
+    }
+
+    [Fact]
+    public void Constructor_ThrowsArgumentOutOfRangeExceptionWhenCounterIsNegative()
+    {
+        Action action = () => new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), -1);
+        action.Should().Throw<ArgumentOutOfRangeException>();
+    }
+
+    [Fact]
+    public void CompareTo_ReturnsOneWhenOtherIsNull()
+    {
+        var dateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+        dateTime.CompareTo(null).Should().Be(1);
+    }
+
+    [Fact]
+    public void CompareTo_ReturnsNegativeOneWhenThisIsLessThanOther()
+    {
+        var dateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+        var otherDateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 2, 0, 0, 0, TimeSpan.Zero), 0);
+
+        var result = dateTime.CompareTo(otherDateTime);
+        result.Should().BeLessThan(0);
+    }
+
+    [Fact]
+    public void CompareTo_ReturnsZeroWhenThisIsEqualToOther()
+    {
+        var dateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+        var otherDateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+
+        var result = dateTime.CompareTo(otherDateTime);
+        result.Should().Be(0);
+    }
+
+    [Fact]
+    public void CompareTo_ReturnsOneWhenThisIsGreaterThanOther()
+    {
+        var dateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 2, 0, 0, 0, TimeSpan.Zero), 0);
+        var otherDateTime = new HybridDateTime(new DateTimeOffset(2000, 1, 1, 0, 0, 0, TimeSpan.Zero), 0);
+
+        var result = dateTime.CompareTo(otherDateTime);
+        result.Should().Be(1);
+    }
+}
\ No newline at end of file