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/SubtitleBurnInEngineGateTests.cs

@@ -0,0 +1,68 @@
+using System;
+using Paca.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class SubtitleBurnInEngineGateTests
+{
+    [Fact]
+    public void Gate357_SubtitleBurnInEngine_BuildsForceStyleString_Correctly()
+    {
+        var style = new SubtitleBurnInStyle
+        {
+            FontName = "Arial",
+            FontSize = 24,
+            PrimaryColor = "&H00FFFFFF",
+            OutlineColor = "&H00000000",
+            OutlineWidth = 2,
+            MarginV = 40,
+            Alignment = 2 // Bottom center
+        };
+
+        var forceStyle = SubtitleBurnInEngine.BuildForceStyleString(style);
+
+        Assert.Contains("FontName=Arial", forceStyle);
+        Assert.Contains("FontSize=24", forceStyle);
+        Assert.Contains("PrimaryColour=&H00FFFFFF", forceStyle);
+        Assert.Contains("Outline=2", forceStyle);
+        Assert.Contains("MarginV=40", forceStyle);
+        Assert.Contains("Alignment=2", forceStyle);
+    }
+
+    [Fact]
+    public void Gate358_SubtitleBurnInEngine_EscapesWindowsPath_ForFfmpegFilter()
+    {
+        var winPath = "C:\\subtitles\\video_track.srt";
+        var escaped = SubtitleBurnInEngine.EscapeSubtitlePathForFfmpeg(winPath);
+
+        // In ffmpeg filtergraph, colon must be escaped as '\:' and backslashes replaced with forward slashes
+        Assert.Equal("C\\:/subtitles/video_track.srt", escaped);
+    }
+
+    [Fact]
+    public void Gate359_SubtitleBurnInEngine_ProvidesDefaultReadableStyle()
+    {
+        var def = SubtitleBurnInStyle.Default;
+
+        Assert.Equal(22, def.FontSize);
+        Assert.Equal(2, def.Alignment); // Bottom center
+        Assert.True(def.OutlineWidth >= 2);
+    }
+
+    [Fact]
+    public void Gate360_SubtitleBurnInEngine_BuildsFullCommandLine_WithAudioCopy()
+    {
+        var cmd = SubtitleBurnInEngine.BuildBurnInCommandLine(
+            inputVideoPath: "C:\\videos\\clip.mp4",
+            subtitlePath: "C:\\videos\\clip.srt",
+            outputVideoPath: "C:\\videos\\clip_subbed.mp4"
+        );
+
+        Assert.Contains("-i \"C:\\videos\\clip.mp4\"", cmd);
+        Assert.Contains("-vf \"subtitles='C\\:/videos/clip.srt'", cmd);
+        Assert.Contains("force_style=", cmd);
+        Assert.Contains("-c:v libx264 -crf 20 -c:a copy", cmd);
+        Assert.EndsWith("\"C:\\videos\\clip_subbed.mp4\" -y", cmd);
+    }
+}