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

tests/Paca.Tests/Mobile/MobileWanGatewayRoamingGateTests.cs

@@ -0,0 +1,121 @@
+using System;
+using System.Threading.Tasks;
+using Paca.Mobile.Core;
+using Paca.Server.Gateway;
+using Xunit;
+
+namespace Paca.Tests.Mobile;
+
+/// <summary>
+/// Gate 127 ~ 132: 3G/4G/5G WAN 게이트웨이 및 Wi-Fi ↔ 셀룰러 무중단 로밍 기계적 검증
+/// </summary>
+public class MobileWanGatewayRoamingGateTests
+{
+    [Fact]
+    public void Gate127_ConnectCode_Generation_And_Validation()
+    {
+        var code = PacaConnectCodeGenerator.GenerateCode();
+        Assert.NotNull(code);
+        Assert.StartsWith("PACA-", code);
+        Assert.True(PacaConnectCodeGenerator.IsValid(code));
+
+        Assert.False(PacaConnectCodeGenerator.IsValid("INVALID-CODE"));
+        Assert.False(PacaConnectCodeGenerator.IsValid(""));
+        Assert.False(PacaConnectCodeGenerator.IsValid(null));
+    }
+
+    [Fact]
+    public void Gate128_WanGatewayConfig_State_Management()
+    {
+        var gateway = new WanGatewayManager(deviceName: "Encep-Studio-PC", localPort: 52100);
+
+        // 기본 상태는 비활성
+        Assert.False(gateway.IsActive);
+        Assert.Equal(GatewayMode.Disabled, gateway.CurrentMode);
+
+        // 원격 릴레이/터널 활성화 시뮬레이션
+        gateway.EnableCloudTunnel("https://relay.paca.app/tunnel-9876", "PACA-884123");
+        Assert.True(gateway.IsActive);
+        Assert.Equal(GatewayMode.CloudTunnel, gateway.CurrentMode);
+        Assert.Equal("https://relay.paca.app/tunnel-9876", gateway.PublicEndpoint);
+        Assert.Equal("PACA-884123", gateway.ConnectCode);
+    }
+
+    [Fact]
+    public void Gate129_Upnp_Mapping_Profile_Creation()
+    {
+        var gateway = new WanGatewayManager(deviceName: "Encep-Studio-PC", localPort: 52100);
+        gateway.EnableDirectPortMapping(publicIp: "203.0.113.50", externalPort: 52100);
+
+        Assert.True(gateway.IsActive);
+        Assert.Equal(GatewayMode.DirectPortMapping, gateway.CurrentMode);
+        Assert.Equal("http://203.0.113.50:52100", gateway.PublicEndpoint);
+    }
+
+    [Fact]
+    public void Gate130_RoamingProfile_Serialization()
+    {
+        var profile = new RoamingDeviceProfile(
+            DeviceId: "device-uuid-1234",
+            DeviceName: "Encep-Desktop",
+            LanEndpoint: "http://192.168.0.15:52100",
+            WanEndpoint: "https://relay.paca.app/tunnel-9876",
+            AuthToken: "token-secret-abc",
+            ConnectCode: "PACA-884123"
+        );
+
+        Assert.Equal("http://192.168.0.15:52100", profile.GetEndpointFor(NetworkEnvironment.LocalWifi));
+        Assert.Equal("https://relay.paca.app/tunnel-9876", profile.GetEndpointFor(NetworkEnvironment.CellularWan));
+    }
+
+    [Fact]
+    public void Gate131_RoamingConnectionManager_Auto_Failover()
+    {
+        var profile = new RoamingDeviceProfile(
+            DeviceId: "device-uuid-1234",
+            DeviceName: "Encep-Desktop",
+            LanEndpoint: "http://192.168.0.15:52100",
+            WanEndpoint: "https://relay.paca.app/tunnel-9876",
+            AuthToken: "token-secret-abc",
+            ConnectCode: "PACA-884123"
+        );
+
+        var roaming = new RoamingConnectionManager(profile);
+
+        // 초기 Wi-Fi 상태 -> LAN 우선
+        roaming.UpdateNetworkState(NetworkEnvironment.LocalWifi);
+        Assert.Equal("http://192.168.0.15:52100", roaming.ActiveEndpoint);
+        Assert.False(roaming.IsRoamingOnCellular);
+
+        // LAN 연결 실패 또는 셀룰러 환경 진입 -> WAN 게이트웨이로 핫-페일오버
+        roaming.RecordConnectionFailure();
+        Assert.Equal("https://relay.paca.app/tunnel-9876", roaming.ActiveEndpoint);
+        Assert.True(roaming.IsRoamingOnCellular);
+
+        // Wi-Fi 재접속 및 헬스체크 복구 -> LAN 복귀
+        roaming.UpdateNetworkState(NetworkEnvironment.LocalWifi);
+        roaming.RecordConnectionSuccess();
+        Assert.Equal("http://192.168.0.15:52100", roaming.ActiveEndpoint);
+        Assert.False(roaming.IsRoamingOnCellular);
+    }
+
+    [Fact]
+    public void Gate132_RoamingConnectionManager_Fallback_When_Wan_Empty()
+    {
+        var profile = new RoamingDeviceProfile(
+            DeviceId: "dev-only-lan",
+            DeviceName: "Desktop-LAN",
+            LanEndpoint: "http://192.168.1.10:52100",
+            WanEndpoint: null, // WAN 미설정 상태
+            AuthToken: "tok",
+            ConnectCode: null
+        );
+
+        var roaming = new RoamingConnectionManager(profile);
+        roaming.UpdateNetworkState(NetworkEnvironment.CellularWan);
+
+        // WAN이 없으면 LAN 주소를 유지하되 오류 상태 경고 플래그
+        Assert.Equal("http://192.168.1.10:52100", roaming.ActiveEndpoint);
+        Assert.True(roaming.RequiresWanSetup);
+    }
+}