fix(parser): set default value for etag field

Author: heitorlessa

aws_lambda_powertools/utilities/parser/models/s3.py

@@ -61,7 +61,7 @@ class S3Message(BaseModel):
 class S3EventNotificationObjectModel(BaseModel):
     key: str
     size: Optional[NonNegativeFloat] = None
-    etag: Optional[str]
+    etag: str = Field(default="")
     version_id: str = Field(None, alias="version-id")
     sequencer: Optional[str] = None
 

tests/unit/parser/test_s3_notification.py

@@ -53,7 +53,7 @@ def test_s3_eventbridge_notification_object_deleted_event():
     assert model.detail.bucket.name == raw_event["detail"]["bucket"]["name"]
     assert model.detail.object.key == raw_event["detail"]["object"]["key"]
     assert model.detail.object.size == raw_event["detail"]["object"].get("size")
-    assert model.detail.object.etag == raw_event["detail"]["object"].get("etag")
+    assert model.detail.object.etag == raw_event["detail"]["object"].get("etag", "")
     assert model.detail.object.sequencer == raw_event["detail"]["object"]["sequencer"]
     assert model.detail.request_id == raw_event["detail"]["request-id"]
     assert model.detail.requester == raw_event["detail"]["requester"]