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/MediaBitrateEstimatorGateTests.cs

@@ -0,0 +1,55 @@
+using System;
+using Paca.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class MediaBitrateEstimatorGateTests
+{
+    [Fact]
+    public void Gate425_MediaBitrateEstimator_CalculatesTargetBitrates_Accurately()
+    {
+        // 100s, 25MB target, 128k audio, 3% container overhead
+        long targetBytes = 25L * 1024 * 1024;
+        var result = MediaBitrateEstimator.CalculateBitrate(100.0, targetBytes, audioBitrateKbps: 128, overheadPercent: 3.0);
+
+        Assert.True(result.IsPossible);
+        Assert.InRange(result.VideoBitrateKbps, 1850, 1950);
+        Assert.Equal(128, result.AudioBitrateKbps);
+    }
+
+    [Fact]
+    public void Gate426_MediaBitrateEstimator_HandlesImpossibleConstraint_Gracefully()
+    {
+        // 1000s, 1MB target (impossible with 128k audio)
+        long targetBytes = 1L * 1024 * 1024;
+        var result = MediaBitrateEstimator.CalculateBitrate(1000.0, targetBytes, audioBitrateKbps: 128);
+
+        Assert.False(result.IsPossible);
+        Assert.True(result.VideoBitrateKbps <= 64); // Fallback minimum
+    }
+
+    [Fact]
+    public void Gate427_MediaBitrateEstimator_ProvidesPlatformPresets()
+    {
+        Assert.Equal(25L * 1024 * 1024, MediaBitrateEstimator.GetPlatformLimitBytes(TargetPlatformLimit.DiscordFree));
+        Assert.Equal(16L * 1024 * 1024, MediaBitrateEstimator.GetPlatformLimitBytes(TargetPlatformLimit.WhatsAppVideo));
+        Assert.Equal(20L * 1024 * 1024, MediaBitrateEstimator.GetPlatformLimitBytes(TargetPlatformLimit.EmailAttachment));
+    }
+
+    [Fact]
+    public void Gate428_MediaBitrateEstimator_BuildsTwoPassFfmpegCommands()
+    {
+        var plan = new BitrateEstimationResult(true, 1800, 128, 25L * 1024 * 1024);
+        var (pass1, pass2) = MediaBitrateEstimator.BuildTwoPassCommands("in.mp4", "out.mp4", plan);
+
+        Assert.Contains("-b:v 1800k", pass1);
+        Assert.Contains("-pass 1", pass1);
+        Assert.Contains("-an", pass1);
+
+        Assert.Contains("-b:v 1800k", pass2);
+        Assert.Contains("-pass 2", pass2);
+        Assert.Contains("-b:a 128k", pass2);
+        Assert.Contains("\"out.mp4\"", pass2);
+    }
+}