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/MediaStreamingTransferGateTests.cs

@@ -0,0 +1,74 @@
+using System;
+using Paca.Mobile.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class MediaStreamingTransferGateTests
+{
+    [Fact]
+    public void Gate353_MediaStreamingTransfer_ParsesExplicitRange_Correctly()
+    {
+        var totalSize = 10_000L;
+        var rangeHeader = "bytes=1000-1999";
+
+        var range = MediaStreamingTransferEngine.ParseRangeHeader(rangeHeader, totalSize);
+
+        Assert.True(range.IsPartial);
+        Assert.Equal(1000L, range.Start);
+        Assert.Equal(1999L, range.End);
+        Assert.Equal(1000L, range.ContentLength);
+        Assert.Equal("bytes 1000-1999/10000", range.ContentRangeHeader);
+    }
+
+    [Fact]
+    public void Gate354_MediaStreamingTransfer_ParsesOpenEndedRange_ToEOF()
+    {
+        var totalSize = 5_000L;
+        var rangeHeader = "bytes=2000-";
+
+        var range = MediaStreamingTransferEngine.ParseRangeHeader(rangeHeader, totalSize);
+
+        Assert.True(range.IsPartial);
+        Assert.Equal(2000L, range.Start);
+        Assert.Equal(4999L, range.End);
+        Assert.Equal(3000L, range.ContentLength);
+        Assert.Equal("bytes 2000-4999/5000", range.ContentRangeHeader);
+    }
+
+    [Fact]
+    public void Gate355_MediaStreamingTransfer_ComputesProgressAndSpeed_Accurately()
+    {
+        // 50 MB transferred out of 100 MB in 5.0 seconds
+        var total = 100 * 1024 * 1024L;
+        var transferred = 50 * 1024 * 1024L;
+        var elapsed = 5.0;
+
+        var progress = MediaStreamingTransferEngine.ComputeProgress("stream-1", transferred, total, elapsed);
+
+        Assert.Equal("stream-1", progress.TransferId);
+        Assert.Equal(50.0, progress.ProgressPercent);
+        Assert.Equal(10 * 1024 * 1024.0, progress.TransferRateBytesPerSec); // 10 MB/s
+        Assert.Equal(10.0, progress.TransferRateMbPerSec);
+    }
+
+    [Fact]
+    public void Gate356_MediaStreamingTransfer_HandlesInvalidRange_WithFullFallback()
+    {
+        var totalSize = 2_000L;
+
+        // Invalid range exceeding total size
+        var invalidRange = "bytes=5000-6000";
+        var result = MediaStreamingTransferEngine.ParseRangeHeader(invalidRange, totalSize);
+
+        Assert.False(result.IsPartial);
+        Assert.Equal(0L, result.Start);
+        Assert.Equal(1999L, result.End);
+        Assert.Equal(2000L, result.ContentLength);
+
+        // Null or empty range
+        var nullResult = MediaStreamingTransferEngine.ParseRangeHeader(null, totalSize);
+        Assert.False(nullResult.IsPartial);
+        Assert.Equal(2000L, nullResult.ContentLength);
+    }
+}