Create tests/test_upload_flow.py

tests/test_upload_flow.py

@@ -0,0 +1,16 @@
+import os
+import tempfile
+from streamlit_app import compress_video, file_sha256
+
+def test_file_hash(tmp_path):
+    f = tmp_path / "a.txt"
+    f.write_bytes(b"hello")
+    assert file_sha256(str(f)) is not None
+
+def test_compress_no_crash(tmp_path):
+    # create a tiny fake mp4 or reuse a small file — here we just ensure function runs without raising
+    src = tmp_path / "in.mp4"
+    src.write_bytes(b"\x00\x00\x00")
+    out = str(tmp_path / "out.mp4")
+    res = compress_video(str(src), out)
+    assert isinstance(res, str)