tests/test_pipeline_ffmpeg_ops.py

@@ -35,6 +35,12 @@ def test_crossfade_loop_rejects_overlap_too_large():
         crossfade_loop_args("in.mp4", "loop.mp4", duration=4.0, overlap=2.0)
 
 
+def test_crossfade_loop_rejects_nonpositive_overlap():
+    import pytest
+    with pytest.raises(ValueError):
+        crossfade_loop_args("in.mp4", "loop.mp4", duration=8.0, overlap=0.0)
+
+
 def test_transcode_args_high_profile_even_dims_faststart():
     args = transcode_args("loop.mp4", "proxy.mp4", width=1920, height=1080,
                           crf=20, fps=30)