feat(parameter): add dynamodb_endpoint_url for local_testing (#376)

* Dynamodb endpoint_url for local testing

* Add endpoint_url parameter on docstring

* docs: fix typo and project name

Signed-off-by: heitorlessa <[email protected]>

* feat: use a tab snippet to standout

Signed-off-by: heitorlessa <[email protected]>

* fix: endpoint_url parameter syntax

Signed-off-by: heitorlessa <[email protected]>

* docs: include example url in docstring

Co-authored-by: heitorlessa <[email protected]>

Author: rtrive

Diff for: aws_lambda_powertools/utilities/parameters/dynamodb.py

@@ -26,6 +26,8 @@ class DynamoDBProvider(BaseProvider):
         Name of the DynamoDB table sort key (defaults to 'sk'), used only for get_multiple
     value_attr: str, optional
         Attribute that contains the values in the DynamoDB table (defaults to 'value')
+    endpoint_url: str, optional
+        Complete url to reference local DynamoDB instance, e.g. http://localhost:8080
     config: botocore.config.Config, optional
         Botocore configuration to pass during client initialization
 
@@ -150,14 +152,15 @@ def __init__(
         key_attr: str = "id",
         sort_attr: str = "sk",
         value_attr: str = "value",
+        endpoint_url: Optional[str] = None,
         config: Optional[Config] = None,
     ):
         """
         Initialize the DynamoDB client
         """
 
         config = config or Config()
-        self.table = boto3.resource("dynamodb", config=config).Table(table_name)
+        self.table = boto3.resource("dynamodb", endpoint_url=endpoint_url, config=config).Table(table_name)
 
         self.key_attr = key_attr
         self.sort_attr = sort_attr

Diff for: docs/utilities/parameters.md

@@ -196,6 +196,17 @@ The AWS Systems Manager Parameter Store provider supports two additional argumen
 
 The DynamoDB Provider does not have any high-level functions, as it needs to know the name of the DynamoDB table containing the parameters.
 
+**Local testing with DynamoDB Local**
+
+You can initialize the DynamoDB provider pointing to [DynamoDB Local](https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DynamoDBLocal.html) using **`endpoint_url`** parameter:
+
+=== "dynamodb_local.py"
+	```python hl_lines="3"
+	from aws_lambda_powertools.utilities import parameters
+
+	dynamodb_provider = parameters.DynamoDBProvider(table_name="my-table", endpoint_url="http://localhost:8000")
+	```
+
 **DynamoDB table structure for single parameters**
 
 For single parameters, you must use `id` as the [partition key](https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.html#HowItWorks.CoreComponents.PrimaryKey) for that table.