Add tests to test_optional_file_list.py

fastapi · tiangolo · Dec 2, 2025 · Nov 5, 2025 · Nov 5, 2025 · Nov 5, 2025
commit e9ceae29a5c86e75afca96f8a458b7080c6c40a9
diff --git a/tests/test_optional_file_list.py b/tests/test_optional_file_list.py
@@ -0,0 +1,30 @@
+from typing import List, Optional
+
+from fastapi import FastAPI, File
+from fastapi.testclient import TestClient
+
+app = FastAPI()
+
+
+@app.post("/files")
+async def upload_files(files: Optional[List[bytes]] = File(None)):
+    if files is None:
+        return {"files_count": 0}
+    return {"files_count": len(files), "sizes": [len(f) for f in files]}
+
+
+def test_optional_bytes_list():
+    client = TestClient(app)
+    response = client.post(
+        "/files",
+        files=[("files", b"content1"), ("files", b"content2")],
+    )
+    assert response.status_code == 200
+    assert response.json() == {"files_count": 2, "sizes": [8, 8]}
+
+
+def test_optional_bytes_list_no_files():
+    client = TestClient(app)
+    response = client.post("/files")
+    assert response.status_code == 200
+    assert response.json() == {"files_count": 0}