add layercake

layercake/tests/conftest.py

@@ -0,0 +1,7 @@
+import boto3
+import pytest
+
+
+@pytest.fixture()
+def dynamodb_client():
+    return boto3.client('dynamodb', endpoint_url='http://127.0.0.1:8000')

layercake/tests/test_dynamodb.py

@@ -0,0 +1,37 @@
+import pytest
+from botocore.exceptions import ClientError
+
+from layercake.dynamodb import DynamoDBPersistenceLayer, TransactItems
+
+
+def test_transact_write_items(dynamodb_client):
+    user_layer = DynamoDBPersistenceLayer('pytest', dynamodb_client)
+    transact = TransactItems(user_layer.table_name)
+    transact.put(
+        item={
+            'id': '5OxmMjL-ujoR5IMGegQz',
+            'sk': '0',
+        }
+    )
+    transact.put(
+        item={
+            'id': 'cpf',
+            'sk': '07879819908',
+        }
+    )
+    transact.put(
+        item={
+            'id': 'email',
+            'sk': 'sergio@somosbeta.com.br',
+        },
+        cond_expr='attribute_not_exists(sk)',
+    )
+    transact.put(
+        item={
+            'id': '5OxmMjL-ujoR5IMGegQz',
+            'sk': 'email:sergio@somosbeta.com.br',
+        },
+        cond_expr='attribute_not_exists(sk)',
+    )
+    with pytest.raises(ClientError):
+        user_layer.transact_write_items(transact)