Tests: xUnit project with HAR fixtures (50 tests); fix relative delivery/HLS URLs resolving to file:// on Linux

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Jellyfin.Plugin.Floatplane.Tests/HlsRewriterTests.cs

@@ -0,0 +1,97 @@
+using System;
+using System.Linq;
+using Jellyfin.Plugin.Floatplane.Playback;
+using Xunit;
+
+namespace Jellyfin.Plugin.Floatplane.Tests;
+
+public class HlsRewriterTests
+{
+    private static readonly Uri PlaylistUrl = new("https://cdn-vod-drm2.floatplane.com/Videos/dcm2jUIg1J/1080.mp4/chunk.m3u8?token=X");
+
+    [Fact]
+    public void Media_playlist_key_is_proxied_and_segments_made_absolute()
+    {
+        var original = Fixture.Text("chunk.m3u8");
+        string? seenKey = null;
+
+        var rewritten = HlsRewriter.Rewrite(
+            original,
+            PlaylistUrl,
+            key =>
+            {
+                seenKey = key;
+                return "http://jellyfin/Floatplane/Stream/dcm2jUIg1J/Key?u=abc&t=sig";
+            });
+
+        var lines = rewritten.Split('\n', StringSplitOptions.RemoveEmptyEntries);
+
+        Assert.Equal("https://www.floatplane.com/api/video/watchKey?token=eyJwYXRoIjoiL1ZpZGVvcy9kY20yalVJZzFKLzEwODAubXA0IiwidGltZXN0YW1wIjoxNzkyODg2NDAwMDAwfQ", seenKey);
+        Assert.Contains("#EXT-X-KEY:METHOD=AES-128,URI=\"http://jellyfin/Floatplane/Stream/dcm2jUIg1J/Key?u=abc&t=sig\"", lines);
+        Assert.DoesNotContain(lines, l => l.Contains("watchKey", StringComparison.Ordinal));
+
+        var segments = lines.Where(l => !l.StartsWith('#')).ToList();
+        Assert.Equal(6, segments.Count);
+        for (var i = 0; i < segments.Count; i++)
+        {
+            Assert.StartsWith("https://cdn-vod-drm2.floatplane.com/Videos/dcm2jUIg1J/1080.mp4/", segments[i]);
+            Assert.EndsWith($".ts?token=SEGTOKEN{i + 1}", segments[i]);
+        }
+
+        Assert.Equal(6, lines.Count(l => l.StartsWith("#EXTINF:", StringComparison.Ordinal)));
+        Assert.Equal("#EXTM3U", lines[0]);
+        Assert.Equal("#EXT-X-ENDLIST", lines[^1]);
+        Assert.Contains("#EXT-X-TARGETDURATION:12", lines);
+        Assert.EndsWith("\n", rewritten);
+    }
+
+    [Fact]
+    public void Segment_mapper_is_applied_when_given()
+    {
+        var rewritten = HlsRewriter.Rewrite(
+            Fixture.Text("chunk.m3u8"),
+            PlaylistUrl,
+            key => "KEY",
+            mapSegmentUri: seg => "http://proxy/seg?u=" + Uri.EscapeDataString(seg));
+
+        var segments = rewritten.Split('\n', StringSplitOptions.RemoveEmptyEntries).Where(l => !l.StartsWith('#')).ToList();
+        Assert.Equal(6, segments.Count);
+        Assert.All(segments, s => Assert.StartsWith("http://proxy/seg?u=https%3A%2F%2Fcdn-vod-drm2.floatplane.com", s));
+    }
+
+    [Fact]
+    public void Master_playlist_variants_are_mapped_through_playlist_mapper()
+    {
+        const string master = "#EXTM3U\n#EXT-X-STREAM-INF:BANDWIDTH=1800000,RESOLUTION=1920x1080\n1080.mp4/chunk.m3u8?token=A\n#EXT-X-STREAM-INF:BANDWIDTH=900000,RESOLUTION=1280x720\nhttps://other.cdn/720/chunk.m3u8?token=B\n";
+        var masterUrl = new Uri("https://cdn-vod-drm2.floatplane.com/Videos/dcm2jUIg1J/master.m3u8?token=M");
+
+        var rewritten = HlsRewriter.Rewrite(
+            master,
+            masterUrl,
+            key => "KEY",
+            playlistUri => "http://proxy/pl?u=" + playlistUri);
+
+        var lines = rewritten.Split('\n', StringSplitOptions.RemoveEmptyEntries);
+        Assert.Equal("http://proxy/pl?u=https://cdn-vod-drm2.floatplane.com/Videos/dcm2jUIg1J/1080.mp4/chunk.m3u8?token=A", lines[2]);
+        Assert.Equal("http://proxy/pl?u=https://other.cdn/720/chunk.m3u8?token=B", lines[4]);
+        Assert.Equal("#EXT-X-STREAM-INF:BANDWIDTH=1800000,RESOLUTION=1920x1080", lines[1]);
+    }
+
+    [Fact]
+    public void Master_playlist_without_mapper_keeps_absolute_urls()
+    {
+        const string master = "#EXTM3U\n#EXT-X-STREAM-INF:BANDWIDTH=1\nsub/chunk.m3u8\n";
+
+        var rewritten = HlsRewriter.Rewrite(master, new Uri("https://cdn.example/dir/master.m3u8"), key => "KEY");
+
+        Assert.Contains("https://cdn.example/dir/sub/chunk.m3u8", rewritten);
+    }
+
+    [Fact]
+    public void Absolute_resolves_relative_and_keeps_absolute()
+    {
+        Assert.Equal("https://cdn.example/a/b.ts", HlsRewriter.Absolute(new Uri("https://cdn.example/a/p.m3u8?x=1"), "b.ts"));
+        Assert.Equal("https://cdn.example/b.ts", HlsRewriter.Absolute(new Uri("https://cdn.example/a/p.m3u8"), "/b.ts"));
+        Assert.Equal("https://other/b.ts", HlsRewriter.Absolute(new Uri("https://cdn.example/a/p.m3u8"), "https://other/b.ts"));
+    }
+}