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test: cover HlsSegmenter's live mode combined with MpegTs format #119

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Merged
cloud-hai-vo merged 1 commit into from
Oct 17, 2026
Merged

test: cover HlsSegmenter's live mode combined with MpegTs format #119

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26 changes: 26 additions & 0 deletions src/EggEncoder.UnitTests/Streaming/Hls/HlsSegmenterTest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -329,6 +329,32 @@ public void MpegTsFormat_EndToEnd_RealAacStreamingEncoder_Should_ProduceWellForm
}
}

[Fact]
public void LiveMode_Combined_With_MpegTsFormat_Should_PruneSegments_AndOmitExtXMap()
{
var sink = new InMemoryStreamingSink();
var segmenter = new HlsSegmenter(1, SampleRate, targetDurationSeconds: 1, sink, liveWindowSize: 2, SegmentFormat.MpegTs);

for (var i = 0; i < 44 * 4; i++) // 4 segments cut -- 2 must age out of the window
{
segmenter.AddFrame(Frame(SamplesPerFrame, i));
}

sink.InitSegment.Should().BeNull("MPEG-TS carries PAT/PMT inside every segment, even in live mode");
sink.MediaSegments.Should().HaveCount(2, "the live window must still be enforced under the MpegTs segment format");
sink.MediaSegments.Keys.Should().BeEquivalentTo(new long[] { 3, 4 });

var playlistText = Encoding.UTF8.GetString(sink.Playlist!);
playlistText.Should().NotContain("#EXT-X-MAP");
playlistText.Should().Contain("segment_3.ts");
playlistText.Should().Contain("segment_4.ts");

foreach (var segmentBytes in sink.MediaSegments.Values)
{
segmentBytes[0].Should().Be(0x47, "every retained segment must still be a well-formed TS file");
}
}

private static EncodedAudioFrame Frame(int sampleCount, long frameIndex) =>
new(new byte[] { 0xAA, 0xBB, 0xCC }, sampleCount, frameIndex);

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