test(core/browser/platform): 26 extreme RED/GREEN TDD cycles and full regression hardening (3,235 PASS)

tests/Paca.Tests/Server/ServerResilienceExtremeRedTests.cs

@@ -0,0 +1,152 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using Paca.Core.Platform;
+using Paca.Server;
+using Paca.Server.Discovery;
+using Xunit;
+
+namespace Paca.Tests.Server;
+
+public class ServerResilienceExtremeRedTests
+{
+    // ==========================================
+    // 1. PositionStore
+    // ==========================================
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void PositionStore_Get_NullOrEmptyId_ReturnsZero(string? id)
+    {
+        var tempDir = Path.Combine(Path.GetTempPath(), "paca_test_pos_" + Guid.NewGuid().ToString("N"));
+        try
+        {
+            var store = new PositionStore(tempDir);
+            var pos = store.Get(id!);
+            Assert.Equal(0, pos);
+        }
+        finally
+        {
+            if (Directory.Exists(tempDir)) Directory.Delete(tempDir, true);
+        }
+    }
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void PositionStore_Set_NullOrWhitespaceId_DoesNotThrowAndDoesNotPersist(string? id)
+    {
+        var tempDir = Path.Combine(Path.GetTempPath(), "paca_test_pos_" + Guid.NewGuid().ToString("N"));
+        try
+        {
+            var store = new PositionStore(tempDir);
+            var ex = Record.Exception(() => store.Set(id!, 42.5));
+            Assert.Null(ex);
+            Assert.Equal(0, store.Get(id!));
+        }
+        finally
+        {
+            if (Directory.Exists(tempDir)) Directory.Delete(tempDir, true);
+        }
+    }
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void PositionStore_Constructor_NullOrEmptyFolder_DoesNotCrash(string? folder)
+    {
+        var ex = Record.Exception(() =>
+        {
+            var store = new PositionStore(folder!);
+            var testKey = "test-key-" + Guid.NewGuid().ToString("N");
+            Assert.Equal(0, store.Get(testKey));
+            store.Set(testKey, 15.0);
+            Assert.Equal(15.0, store.Get(testKey));
+        });
+        Assert.Null(ex);
+    }
+
+    // ==========================================
+    // 2. Thumbnailer
+    // ==========================================
+
+    [Theory]
+    [InlineData(null, "C:\\media\\test.mp4")]
+    [InlineData("ffmpeg.exe", null)]
+    [InlineData("", "C:\\media\\test.mp4")]
+    [InlineData("ffmpeg.exe", "   ")]
+    public async Task Thumbnailer_GetThumbnailAsync_NullOrEmptyInputs_ReturnsNull(string? ffmpeg, string? media)
+    {
+        var thumb = new Thumbnailer(DesktopProcessRunner.Default);
+        var res = await thumb.GetThumbnailAsync(ffmpeg!, media!);
+        Assert.Null(res);
+    }
+
+    [Theory]
+    [InlineData(null, "C:\\media\\test.mp4")]
+    [InlineData("ffmpeg.exe", null)]
+    [InlineData("", "C:\\media\\test.mp4")]
+    [InlineData("ffmpeg.exe", "   ")]
+    public async Task Thumbnailer_GetResolutionAsync_NullOrEmptyInputs_ReturnsNull(string? ffmpeg, string? media)
+    {
+        var thumb = new Thumbnailer(DesktopProcessRunner.Default);
+        var res = await thumb.GetResolutionAsync(ffmpeg!, media!);
+        Assert.Null(res);
+    }
+
+    // ==========================================
+    // 3. MediaLibrary
+    // ==========================================
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void MediaLibrary_List_NullOrEmptyFolder_ReturnsEmpty(string? folder)
+    {
+        var list = MediaLibrary.List(folder!);
+        Assert.NotNull(list);
+        Assert.Empty(list);
+    }
+
+    [Theory]
+    [InlineData(null, "some-id")]
+    [InlineData("C:\\Media", null)]
+    [InlineData("", "some-id")]
+    [InlineData("C:\\Media", "   ")]
+    public void MediaLibrary_Find_NullOrEmptyParameters_ReturnsNull(string? folder, string? id)
+    {
+        var item = MediaLibrary.Find(folder!, id!);
+        Assert.Null(item);
+    }
+
+    // ==========================================
+    // 4. LanBeaconResponder
+    // ==========================================
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    [InlineData("GARBAGE_PAYLOAD")]
+    [InlineData("{ \"invalid\": true }")]
+    public void LanBeaconResponder_ProcessIncomingPayload_NullOrGarbagePayload_ReturnsNull(string? payload)
+    {
+        var responder = new LanBeaconResponder("PACA-TEST", 52100);
+        var response = responder.ProcessIncomingPayload(payload!, "192.168.1.50");
+        Assert.Null(response);
+    }
+
+    [Fact]
+    public void LanBeaconResponder_BuildPongMessage_NullIp_UsesDefaultIp()
+    {
+        var responder = new LanBeaconResponder("PACA-TEST", 52100);
+        var pong = responder.BuildPongMessage(null);
+        Assert.NotNull(pong);
+        Assert.Contains("0.0.0.0", pong.Endpoint);
+    }
+}