update tests

Signed-off-by: gabriel miranda <gabrielmfern@outlook.com>

Author: gabrielmfern

tests/attachments_async_test.py

@@ -56,6 +56,8 @@ async def test_sent_email_attachments_list_async(self) -> None:
                         "content_type": "image/png",
                         "content_disposition": "inline",
                         "size": 1024,
+                        "download_url": "https://cdn.resend.com/emails/test/attachments/test-id",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     }
                 ],
             }

tests/attachments_test.py

@@ -86,13 +86,17 @@ def test_receiving_list_attachments(self) -> None:
                         "content_disposition": "inline",
                         "content_id": "img001",
                         "size": 1024,
+                        "download_url": "https://inbound-cdn.resend.com/test/attachments/2a0c9ce0?signature=sig-123",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     },
                     {
                         "id": "3b1d0df1-4223-5839-a87f-58eecd27b429",
                         "filename": "document.pdf",
                         "content_type": "application/pdf",
                         "content_disposition": "attachment",
                         "size": 2048,
+                        "download_url": "https://inbound-cdn.resend.com/test/attachments/3b1d0df1?signature=sig-456",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     },
                 ],
             }
@@ -110,6 +114,8 @@ def test_receiving_list_attachments(self) -> None:
         assert attachments["data"][0]["id"] == "2a0c9ce0-3112-4728-976e-47ddcd16a318"
         assert attachments["data"][0]["filename"] == "avatar.png"
         assert attachments["data"][0]["size"] == 1024
+        assert "https://inbound-cdn.resend.com" in attachments["data"][0]["download_url"]
+        assert attachments["data"][0]["expires_at"] == "2025-10-17T14:29:41.521Z"
         assert attachments["data"][1]["id"] == "3b1d0df1-4223-5839-a87f-58eecd27b429"
         assert attachments["data"][1]["filename"] == "document.pdf"
 
@@ -125,6 +131,8 @@ def test_receiving_list_attachments_with_pagination(self) -> None:
                         "content_type": "image/png",
                         "content_disposition": "inline",
                         "size": 1024,
+                        "download_url": "https://inbound-cdn.resend.com/test/attachments/2a0c9ce0?signature=sig-123",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     },
                 ],
             }

tests/emails_test.py

@@ -280,6 +280,7 @@ def test_receiving_get(self) -> None:
                         "content_type": "application/pdf",
                         "content_id": "cid_123",
                         "content_disposition": "attachment",
+                        "size": 4096,
                     }
                 ],
             }
@@ -332,6 +333,61 @@ def test_receiving_get_with_no_attachments(self) -> None:
         assert email["reply_to"] is None
         assert len(email["attachments"]) == 0
 
+    def test_receiving_get_with_nullable_attachment_fields(self) -> None:
+        # Inbound MIME parts (S/MIME signatures, calendar invites) can return
+        # null for filename, content_id, and content_disposition.
+        # See: https://linear.app/resend/issue/DEV-934
+        self.set_mock_json(
+            {
+                "object": "inbound",
+                "id": "67d9bcdb-5a02-42d7-8da9-0d6feea18cff",
+                "to": ["received@example.com"],
+                "from": "sender@example.com",
+                "created_at": "2023-04-07T23:13:52.669661+00:00",
+                "subject": "Signed inbound email",
+                "html": None,
+                "text": "hello world",
+                "bcc": None,
+                "cc": None,
+                "reply_to": None,
+                "headers": {},
+                "message_id": "<msg@example.com>",
+                "attachments": [
+                    {
+                        "id": "f5e32216-3017-4118-97d5-5c84d991bf98",
+                        "filename": "smime.p7s",
+                        "content_type": "application/pkcs7-signature",
+                        "content_id": None,
+                        "content_disposition": "attachment",
+                        "size": 1361,
+                    },
+                    {
+                        "id": "68136802-3577-4911-a7d2-b303e61261ac",
+                        "filename": None,
+                        "content_type": "text/calendar",
+                        "content_id": None,
+                        "content_disposition": None,
+                        "size": 1152,
+                    },
+                ],
+            }
+        )
+
+        email: resend.ReceivedEmail = resend.Emails.Receiving.get(
+            email_id="67d9bcdb-5a02-42d7-8da9-0d6feea18cff",
+        )
+        assert len(email["attachments"]) == 2
+
+        smime = email["attachments"][0]
+        assert smime["filename"] == "smime.p7s"
+        assert smime["content_disposition"] == "attachment"
+        assert smime["content_id"] is None
+
+        calendar = email["attachments"][1]
+        assert calendar["filename"] is None
+        assert calendar["content_disposition"] is None
+        assert calendar["content_id"] is None
+
     def test_should_receiving_get_raise_exception_when_no_content(self) -> None:
         self.set_mock_json(None)
         with self.assertRaises(NoContentError):

tests/receiving_async_test.py

@@ -117,13 +117,17 @@ async def test_receiving_attachments_list_async(self) -> None:
                         "content_disposition": "inline",
                         "content_id": "img001",
                         "size": 1024,
+                        "download_url": "https://inbound-cdn.resend.com/test/attachments/2a0c9ce0?signature=sig-123",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     },
                     {
                         "id": "3b1d0df1-4223-5839-a87f-58eecd27b429",
                         "filename": "document.pdf",
                         "content_type": "application/pdf",
                         "content_disposition": "attachment",
                         "size": 2048,
+                        "download_url": "https://inbound-cdn.resend.com/test/attachments/3b1d0df1?signature=sig-456",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     },
                 ],
             }

tests/response_test.py

@@ -18,6 +18,8 @@ def test_list_response_supports_dict_access(self) -> None:
                         "content_type": "image/png",
                         "content_disposition": "inline",
                         "size": 1024,
+                        "download_url": "https://cdn.resend.com/att-1",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     },
                 ],
             }
@@ -28,6 +30,7 @@ def test_list_response_supports_dict_access(self) -> None:
         assert attachments["has_more"] is False
         assert len(attachments["data"]) == 1
         assert attachments["data"][0]["id"] == "att-1"
+        assert attachments["data"][0]["download_url"] == "https://cdn.resend.com/att-1"
 
     def test_list_response_supports_attribute_access(self) -> None:
         self.set_mock_json(
@@ -41,6 +44,8 @@ def test_list_response_supports_attribute_access(self) -> None:
                         "content_type": "image/png",
                         "content_disposition": "inline",
                         "size": 1024,
+                        "download_url": "https://cdn.resend.com/att-1",
+                        "expires_at": "2025-10-17T14:29:41.521Z",
                     },
                 ],
             }