add unit tests

2026-08-06 13:47:49 -05:00
parent 903a87f947
commit 9a1664bdbb
4 changed files with 228 additions and 0 deletions
@@ -0,0 +1,111 @@
+using SafelyYou;
+
+namespace SafelyYouTests;
+
+public class DeviceHeartBeatHistoryTests
+{
+    private static readonly DateTimeOffset T0 = new(2024, 1, 1, 12, 0, 0, TimeSpan.Zero);
+    private static readonly DateTimeOffset T1 = T0.AddMinutes(1);
+    private static readonly DateTimeOffset T2 = T0.AddMinutes(2);
+
+    [Test]
+    public void Add_FirstHeartbeat_SetsFirstLastAndCount()
+    {
+        var history = new DeviceHeartBeatHistory();
+
+        var result = history.Add(T0);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(result, Is.EqualTo(DeviceHeartBeatHistory.AddResult.Added));
+            Assert.That(history.NumberOfHeartBeats, Is.EqualTo(1));
+            Assert.That(history.FirstHeartBeat, Is.EqualTo(T0));
+            Assert.That(history.LastHeartBeat, Is.EqualTo(T0));
+        });
+    }
+
+    [Test]
+    public void Add_LaterHeartbeat_UpdatesLastAndIncrementsCount()
+    {
+        var history = new DeviceHeartBeatHistory();
+        history.Add(T0);
+
+        var result = history.Add(T1);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(result, Is.EqualTo(DeviceHeartBeatHistory.AddResult.Added));
+            Assert.That(history.NumberOfHeartBeats, Is.EqualTo(2));
+            Assert.That(history.FirstHeartBeat, Is.EqualTo(T0));
+            Assert.That(history.LastHeartBeat, Is.EqualTo(T1));
+        });
+    }
+
+    [Test]
+    public void Add_SameTimestampAsLast_IsAccepted()
+    {
+        var history = new DeviceHeartBeatHistory();
+        history.Add(T0);
+
+        var result = history.Add(T0);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(result, Is.EqualTo(DeviceHeartBeatHistory.AddResult.Added));
+            Assert.That(history.NumberOfHeartBeats, Is.EqualTo(2));
+            Assert.That(history.FirstHeartBeat, Is.EqualTo(T0));
+            Assert.That(history.LastHeartBeat, Is.EqualTo(T0));
+        });
+    }
+
+    [Test]
+    public void Add_EarlierThanLast_ReturnsOutOfSequenceAndDoesNotMutate()
+    {
+        var history = new DeviceHeartBeatHistory();
+        history.Add(T1);
+
+        var result = history.Add(T0);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(result, Is.EqualTo(DeviceHeartBeatHistory.AddResult.OutOfSequence));
+            Assert.That(history.NumberOfHeartBeats, Is.EqualTo(1));
+            Assert.That(history.FirstHeartBeat, Is.EqualTo(T1));
+            Assert.That(history.LastHeartBeat, Is.EqualTo(T1));
+        });
+    }
+
+    [Test]
+    public void Add_MultipleInOrder_KeepsFirstAndAdvancesLast()
+    {
+        var history = new DeviceHeartBeatHistory();
+
+        Assert.That(history.Add(T0), Is.EqualTo(DeviceHeartBeatHistory.AddResult.Added));
+        Assert.That(history.Add(T1), Is.EqualTo(DeviceHeartBeatHistory.AddResult.Added));
+        Assert.That(history.Add(T2), Is.EqualTo(DeviceHeartBeatHistory.AddResult.Added));
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(history.NumberOfHeartBeats, Is.EqualTo(3));
+            Assert.That(history.FirstHeartBeat, Is.EqualTo(T0));
+            Assert.That(history.LastHeartBeat, Is.EqualTo(T2));
+        });
+    }
+
+    [Test]
+    public void Add_WithGap_StillCountsHeartbeat()
+    {
+        var history = new DeviceHeartBeatHistory();
+        history.Add(T0);
+
+        var muchLater = T0.AddHours(1);
+        var result = history.Add(muchLater);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(result, Is.EqualTo(DeviceHeartBeatHistory.AddResult.Added));
+            Assert.That(history.NumberOfHeartBeats, Is.EqualTo(2));
+            Assert.That(history.LastHeartBeat, Is.EqualTo(muchLater));
+        });
+    }
+}