test big file

tests/integration_test_90_features.py

@@ -1,4 +1,6 @@
+import datetime
 import os
+import pathlib
 from pathlib import Path
 from typing import Any
 
@@ -68,3 +70,18 @@ def test_features_mars_cds_adaptor_format(
     _, actual_extension = os.path.splitext(result)
     assert actual_extension == expected_extension
     assert os.path.getsize(result)
+
+
+def test_features_upload_big_file(
+    api_anon_client: ApiClient, tmp_path: pathlib.Path
+) -> None:
+    # See: https://github.com/fsspec/s3fs/pull/910
+    target = str(tmp_path / "test.grib")
+    size = 1_048_576_000 + 1
+    api_anon_client.retrieve(
+        "test-adaptor-dummy",
+        size=size,
+        _timestamp=datetime.datetime.now().isoformat(),
+        target=target,
+    )
+    assert os.path.getsize(target) == size