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/VideoIntroOutroTrimmerGateTests.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using Paca.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class VideoIntroOutroTrimmerGateTests
+{
+    [Fact]
+    public void Gate373_VideoIntroOutroTrimmer_ParsesSilenceSpans_FromFfmpegStderr()
+    {
+        var stderr = @"
+[silencedetect @ 0000021c1c68f140] silence_start: 0
+[silencedetect @ 0000021c1c68f140] silence_end: 4.2 | silence_duration: 4.2
+[silencedetect @ 0000021c1c68f140] silence_start: 115.8
+[silencedetect @ 0000021c1c68f140] silence_end: 120.0 | silence_duration: 4.2
+";
+
+        var spans = VideoIntroOutroTrimmer.ParseSilenceSpans(stderr);
+
+        Assert.Equal(2, spans.Count);
+        Assert.Equal(0.0, spans[0].StartSec);
+        Assert.Equal(4.2, spans[0].EndSec);
+        Assert.Equal(4.2, spans[0].DurationSec);
+
+        Assert.Equal(115.8, spans[1].StartSec);
+        Assert.Equal(120.0, spans[1].EndSec);
+    }
+
+    [Fact]
+    public void Gate374_VideoIntroOutroTrimmer_CalculatesPlaybackTrimWindow()
+    {
+        var totalDuration = 180.0; // 3 minutes
+        var skipIntro = 10.0;     // Skip first 10s
+        var skipOutro = 20.0;     // Skip last 20s
+
+        var window = VideoIntroOutroTrimmer.CalculateTrimWindow(totalDuration, skipIntro, skipOutro);
+
+        Assert.Equal(10.0, window.StartSec);
+        Assert.Equal(160.0, window.EndSec);
+        Assert.Equal(150.0, window.DurationSec);
+    }
+
+    [Fact]
+    public void Gate375_VideoIntroOutroTrimmer_ClampsExcessiveSkips_ToMinimumOneSecond()
+    {
+        var totalDuration = 30.0;
+        var excessiveIntro = 25.0;
+        var excessiveOutro = 20.0; // sum = 45 > 30
+
+        var window = VideoIntroOutroTrimmer.CalculateTrimWindow(totalDuration, excessiveIntro, excessiveOutro);
+
+        // Should clamp so duration is at least 1.0s
+        Assert.True(window.DurationSec >= 1.0);
+        Assert.True(window.EndSec <= totalDuration);
+    }
+
+    [Fact]
+    public void Gate376_VideoIntroOutroTrimmer_BuildsLosslessTrimCommandLine()
+    {
+        var cmd = VideoIntroOutroTrimmer.BuildLosslessTrimCommandLine(
+            inputPath: "C:\\videos\\full.mp4",
+            outputPath: "C:\\videos\\trimmed.mp4",
+            startSec: 10.5,
+            durationSec: 150.0
+        );
+
+        Assert.Contains("-ss 10.50 -i \"C:\\videos\\full.mp4\"", cmd);
+        Assert.Contains("-t 150.00", cmd);
+        Assert.Contains("-c copy", cmd);
+        Assert.EndsWith("\"C:\\videos\\trimmed.mp4\" -y", cmd);
+    }
+}