test: Detect truncated download in get_previous_releases.py

test/get_previous_releases.py

@@ -122,7 +122,7 @@ def download_from_url(url, archive):
         if response.status != 200:
             raise RuntimeError(f"HTTP request failed with status code: {response.status}")
 
-        total_size = int(response.getheader('Content-Length', 0))
+        total_size = int(response.getheader("Content-Length"))
         progress_bytes = 0
 
         with open(archive, 'wb') as file:
@@ -134,6 +134,9 @@ def download_from_url(url, archive):
                 progress_bytes += len(chunk)
                 progress_hook(progress_bytes, total_size)
 
+        if progress_bytes < total_size:
+            raise RuntimeError(f"Download incomplete: expected {total_size} bytes, got {progress_bytes} bytes")
+
     print('\n', flush=True, end="") # Flush to avoid error output on the same line.