added test for delete file

tests/test_delete_file.py

@@ -0,0 +1,27 @@
+from typing import Any
+from uuid import uuid4
+
+import pytest
+from httpx import AsyncClient
+from smolvault.models import FileUploadDTO
+
+
+@pytest.mark.asyncio()
+@pytest.mark.usefixtures("_test_bucket")
+async def test_delete_file(client: AsyncClient, camera_img: bytes) -> None:
+    # first upload the file
+    filename = f"{uuid4().hex[:6]}-camera.png"
+    expected_obj = FileUploadDTO(name=filename, size=len(camera_img), content=camera_img, tags="camera,photo")
+    expected = expected_obj.model_dump(exclude={"content", "upload_timestamp", "tags"})
+    response = await client.post(
+        "/file/upload", files={"file": (filename, camera_img, "image/png")}, data={"tags": "camera,photo"}
+    )
+    actual: dict[str, Any] = response.json()
+    actual.pop("upload_timestamp")
+    assert response.status_code == 201
+    assert actual == expected
+
+    # now delete the file
+    response = await client.delete(f"/file/{filename}")
+    assert response.status_code == 200
+    assert response.json() == {"message": "File deleted successfully", "record": expected}  # TODO: Fix this assertion