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 +1,89 @@
+using SafelyYou;
+
+namespace SafelyYouTests;
+
+public class HeartBeatHistoriesUptimeTests
+{
+    private static readonly DeviceId Device = new("device-1");
+    private static readonly DateTimeOffset T0 = new(2024, 1, 1, 12, 0, 0, TimeSpan.Zero);
+
+    [Test]
+    public void Uptime_UnknownDevice_ReturnsZero()
+    {
+        var histories = new HeartBeatHistories();
+
+        Assert.That(histories.Uptime(Device), Is.EqualTo(0));
+    }
+
+    [Test]
+    public void Uptime_SingleHeartbeat_ReturnsZero()
+    {
+        var histories = new HeartBeatHistories();
+        histories.Add(Device, T0);
+
+        // first == last => TotalMinutes is 0, guarded to return 0
+        Assert.That(histories.Uptime(Device), Is.EqualTo(0));
+    }
+
+    [Test]
+    public void Uptime_TwoHeartbeatsOneMinuteApart_ReturnsTwoHundred()
+    {
+        var histories = new HeartBeatHistories();
+        histories.Add(Device, T0);
+        histories.Add(Device, T0.AddMinutes(1));
+
+        // (2 beats / 1 minute) * 100
+        Assert.That(histories.Uptime(Device), Is.EqualTo(200).Within(0.001));
+    }
+
+    [Test]
+    public void Uptime_TwoHeartbeatsOverTwoMinutes_ReturnsOneHundred()
+    {
+        var histories = new HeartBeatHistories();
+        histories.Add(Device, T0);
+        histories.Add(Device, T0.AddMinutes(2));
+
+        // (2 beats / 2 minutes) * 100
+        Assert.That(histories.Uptime(Device), Is.EqualTo(100).Within(0.001));
+    }
+
+    [Test]
+    public void Uptime_ThreeHeartbeatsOverTwoMinutes_ReturnsOneHundredFifty()
+    {
+        var histories = new HeartBeatHistories();
+        histories.Add(Device, T0);
+        histories.Add(Device, T0.AddMinutes(1));
+        histories.Add(Device, T0.AddMinutes(2));
+
+        // (3 beats / 2 minutes) * 100
+        Assert.That(histories.Uptime(Device), Is.EqualTo(150).Within(0.001));
+    }
+
+    [Test]
+    public void Uptime_IsPerDevice()
+    {
+        var other = new DeviceId("device-2");
+        var histories = new HeartBeatHistories();
+        histories.Add(Device, T0);
+        histories.Add(Device, T0.AddMinutes(1));
+        histories.Add(other, T0);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(histories.Uptime(Device), Is.EqualTo(200).Within(0.001));
+            Assert.That(histories.Uptime(other), Is.EqualTo(0));
+        });
+    }
+
+    [Test]
+    public void Uptime_OutOfSequenceHeartbeat_DoesNotAffectCalculation()
+    {
+        var histories = new HeartBeatHistories();
+        histories.Add(Device, T0.AddMinutes(1));
+        histories.Add(Device, T0); // rejected
+        histories.Add(Device, T0.AddMinutes(3));
+
+        // still 2 beats over 2 minutes
+        Assert.That(histories.Uptime(Device), Is.EqualTo(100).Within(0.001));
+    }
+}