e2e tests wip

tests/e2e/expected_download.py

@@ -0,0 +1,26 @@
+import hashlib
+import os.path
+from pathlib import Path
+from typing import Dict
+
+
+class ExpectedDownload:
+    """
+    To test ytdl-sub downloads work, we compare each downloaded file's md5 hash to an
+    expected md5 hash defined in this class
+    """
+
+    def __init__(self, expected_md5_file_hashes: Dict[Path, str]):
+        self.expected_md5_file_hashes = expected_md5_file_hashes
+
+    def assert_files_exist(self):
+        """
+        Assert each expected file exists and that its respective md5 hash matches.
+        """
+        for path, expected_md5_hash in self.expected_md5_file_hashes.items():
+            assert os.path.isfile(path), f"Expected {str(path)} to be a file but it is not"
+
+            with open(path, "rb") as file:
+                md5_hash = hashlib.md5(file.read()).hexdigest()
+
+            assert md5_hash == expected_md5_hash, f"MD5  hash for {str(path)} does not match"