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4021124 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | from typing import Any, Dict, Optional
import pytest
from aws_lambda_powertools.shared.dynamodb_deserializer import TypeDeserializer
class DeserialiserModel:
def __init__(self, data: dict):
self._data = data
self._deserializer = TypeDeserializer()
def _deserialize_dynamodb_dict(self) -> Optional[Dict[str, Any]]:
if self._data is None:
return None
return {k: self._deserializer.deserialize(v) for k, v in self._data.items()}
@property
def data(self) -> Optional[Dict[str, Any]]:
"""The primary key attribute(s) for the DynamoDB item that was modified."""
return self._deserialize_dynamodb_dict()
def test_deserializer():
model = DeserialiserModel(
{
"Id": {"S": "Id-123"},
"Name": {"S": "John Doe"},
"ZipCode": {"N": "12345"},
"Things": {"L": [{"N": "0"}, {"N": "1"}, {"N": "2"}, {"N": "3"}]},
"MoreThings": {"M": {"a": {"S": "foo"}, "b": {"S": "bar"}}},
},
)
assert model.data.get("Id") == "Id-123"
assert model.data.get("Name") == "John Doe"
assert model.data.get("ZipCode") == 12345
assert model.data.get("Things") == [0, 1, 2, 3]
assert model.data.get("MoreThings") == {"a": "foo", "b": "bar"}
def test_deserializer_error():
model = DeserialiserModel(
{
"Id": {"X": None},
},
)
with pytest.raises(TypeError):
model.data.get("Id")
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