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

tests/Paca.Tests/Browser/ChromeDownloadShelfSecurityTests.cs

@@ -0,0 +1,99 @@
+using System.Linq;
+using Paca.Browser.Downloads;
+using Xunit;
+
+namespace Paca.Tests.Browser;
+
+public class ChromeDownloadShelfSecurityTests
+{
+    [Fact]
+    public void AutoOpenFilePolicy_Strictly_Blocks_Dangerous_Executable_Extensions()
+    {
+        var policy = new ChromeAutoOpenFilePolicy();
+
+        // Must reject common executable and script types
+        string[] dangerous = { ".exe", ".bat", ".cmd", ".ps1", ".vbs", ".js", ".msi", ".scr", ".jar", ".pif", ".cpl", ".hta" };
+        foreach (var ext in dangerous)
+        {
+            bool setSuccess = policy.SetAutoOpen(ext, true);
+            Assert.False(setSuccess);
+            Assert.False(policy.IsAutoOpenEnabled(ext));
+            Assert.False(policy.CanAutoOpen($"payload{ext}"));
+            Assert.False(policy.CanAutoOpen($"PAYLOAD{ext.ToUpperInvariant()}"));
+        }
+    }
+
+    [Fact]
+    public void AutoOpenFilePolicy_Allows_Safe_Extensions_And_Toggles_State()
+    {
+        var policy = new ChromeAutoOpenFilePolicy();
+
+        Assert.False(policy.CanAutoOpen("document.pdf"));
+
+        bool setPdf = policy.SetAutoOpen(".pdf", true);
+        Assert.True(setPdf);
+        Assert.True(policy.IsAutoOpenEnabled(".pdf"));
+        Assert.True(policy.CanAutoOpen("document.pdf"));
+        Assert.True(policy.CanAutoOpen("REPORT.PDF"));
+
+        // Disable
+        policy.SetAutoOpen("pdf", false);
+        Assert.False(policy.IsAutoOpenEnabled(".pdf"));
+        Assert.False(policy.CanAutoOpen("document.pdf"));
+    }
+
+    [Fact]
+    public void DownloadShelfCoordinator_Tracks_Items_And_Enforces_Capacity()
+    {
+        var coordinator = new ChromeDownloadShelfCoordinator(maxItems: 3);
+        Assert.Empty(coordinator.Items);
+        Assert.False(coordinator.IsVisible);
+
+        var it1 = coordinator.AddOrUpdate("1", "video1.mp4", 1000);
+        var it2 = coordinator.AddOrUpdate("2", "video2.mp4", 2000);
+        var it3 = coordinator.AddOrUpdate("3", "video3.mp4", 3000);
+
+        Assert.Equal(3, coordinator.Items.Count);
+        Assert.True(coordinator.IsVisible);
+
+        // Adding 4th item evicts oldest (it1)
+        var it4 = coordinator.AddOrUpdate("4", "video4.mp4", 4000);
+        Assert.Equal(3, coordinator.Items.Count);
+        Assert.DoesNotContain(coordinator.Items, x => x.Id == "1");
+        Assert.Contains(coordinator.Items, x => x.Id == "4");
+
+        // Update progress
+        coordinator.UpdateProgress("4", bytesReceived: 2000, speedBytesPerSec: 500000, isComplete: false);
+        var item4 = coordinator.Items.First(x => x.Id == "4");
+        Assert.Equal(2000, item4.BytesReceived);
+        Assert.Equal(50, item4.Percent);
+        Assert.False(item4.IsComplete);
+
+        // Mark complete
+        coordinator.UpdateProgress("4", bytesReceived: 4000, speedBytesPerSec: 0, isComplete: true, filePath: @"C:\downloads\video4.mp4");
+        item4 = coordinator.Items.First(x => x.Id == "4");
+        Assert.Equal(100, item4.Percent);
+        Assert.True(item4.IsComplete);
+        Assert.Equal(@"C:\downloads\video4.mp4", item4.FilePath);
+    }
+
+    [Fact]
+    public void DownloadShelfCoordinator_Dismiss_And_Clear()
+    {
+        var coordinator = new ChromeDownloadShelfCoordinator();
+        coordinator.AddOrUpdate("1", "doc.pdf", 500);
+        coordinator.AddOrUpdate("2", "music.mp3", 1500);
+
+        Assert.Equal(2, coordinator.Items.Count);
+        Assert.True(coordinator.IsVisible);
+
+        coordinator.DismissItem("1");
+        Assert.Single(coordinator.Items);
+        Assert.Equal("2", coordinator.Items[0].Id);
+        Assert.True(coordinator.IsVisible);
+
+        coordinator.DismissAll();
+        Assert.Empty(coordinator.Items);
+        Assert.False(coordinator.IsVisible);
+    }
+}