feat(ads/seo/release): v1.2.0 with live Google Ads, isolated ad profile, ads.txt, and SEO/AEO/GEO optimization

tests/Paca.Tests/Core/NetworkLatencyJitterGateTests.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using Paca.Mobile.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class NetworkLatencyJitterGateTests
+{
+    [Fact]
+    public void Gate365_NetworkLatencyJitter_EvaluatesExcellentHealth_OnLowLatency()
+    {
+        var samples = new List<LatencySample>
+        {
+            new(15.0, true),
+            new(18.0, true),
+            new(16.0, true),
+            new(17.0, true),
+            new(15.0, true)
+        };
+
+        var report = NetworkLatencyJitterProber.AnalyzeSamples(samples);
+
+        Assert.Equal(NetworkHealthRating.Excellent, report.Rating);
+        Assert.InRange(report.AverageRttMs, 16.0, 16.5);
+        Assert.True(report.JitterMs < 5.0);
+        Assert.Equal(0.0, report.PacketLossPercent);
+        Assert.Contains("초고속", report.Recommendation);
+    }
+
+    [Fact]
+    public void Gate366_NetworkLatencyJitter_DetectsPacketLoss_AndDegradesRating()
+    {
+        var samples = new List<LatencySample>
+        {
+            new(30.0, true),
+            new(0.0, false), // Lost
+            new(35.0, true),
+            new(40.0, true),
+            new(0.0, false)  // Lost
+        };
+
+        // 2 out of 5 lost = 40% loss
+        var report = NetworkLatencyJitterProber.AnalyzeSamples(samples);
+
+        Assert.True(report.Rating == NetworkHealthRating.Degraded || report.Rating == NetworkHealthRating.Poor);
+        Assert.Equal(40.0, report.PacketLossPercent);
+        Assert.Contains("패킷 손실", report.Recommendation);
+    }
+
+    [Fact]
+    public void Gate367_NetworkLatencyJitter_EvaluatesPoor_OnHighJitterAndLatency()
+    {
+        var samples = new List<LatencySample>
+        {
+            new(450.0, true),
+            new(200.0, true),
+            new(550.0, true),
+            new(180.0, true)
+        };
+
+        var report = NetworkLatencyJitterProber.AnalyzeSamples(samples);
+
+        Assert.Equal(NetworkHealthRating.Poor, report.Rating);
+        Assert.True(report.AverageRttMs > 300.0);
+        Assert.True(report.JitterMs > 100.0);
+    }
+
+    [Fact]
+    public void Gate368_NetworkLatencyJitter_HandlesEmptyOrTotalLossGracefully()
+    {
+        var empty = NetworkLatencyJitterProber.AnalyzeSamples(new List<LatencySample>());
+        Assert.Equal(NetworkHealthRating.Poor, empty.Rating);
+        Assert.Equal(100.0, empty.PacketLossPercent);
+
+        var totalLoss = NetworkLatencyJitterProber.AnalyzeSamples(new List<LatencySample>
+        {
+            new(0.0, false),
+            new(0.0, false)
+        });
+        Assert.Equal(NetworkHealthRating.Poor, totalLoss.Rating);
+        Assert.Equal(100.0, totalLoss.PacketLossPercent);
+    }
+}