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A micro library that provides the AWS Lambda Context class for type checking and testing.
.. code-block::
pip install aws-lambda-context
Import the LambdaContext on your handler file and type hint the lambda function with it:
.. code-block:: python
from aws_lambda_context import LambdaContext
def my_lambda_handler(event: Any, context: LambdaContext) -> None:
...
The type hint should enables type checking with mypy_ and editor auto-completion
The class is also useful as a mock during tests:
.. code-block:: python
from aws_lambda_context import (
LambdaClientContext,
LambdaClientContextMobileClient,
LambdaCognitoIdentity,
LambdaContext
)
def test_handler():
lambda_cognito_identity = LambdaCognitoIdentity()
lambda_cognito_identity.cognito_identity_id = 'cognito_identity_id'
lambda_cognito_identity.cognito_identity_pool_id = 'cognito_identity_pool_id'
lambda_client_context_mobile_client = LambdaClientContextMobileClient()
lambda_client_context_mobile_client.installation_id = 'installation_id'
lambda_client_context_mobile_client.app_title = 'app_title'
lambda_client_context_mobile_client.app_version_name = 'app_version_name'
lambda_client_context_mobile_client.app_version_code = 'app_version_code'
lambda_client_context_mobile_client.app_package_name = 'app_package_name'
lambda_client_context = LambdaClientContext()
lambda_client_context.client = lambda_client_context_mobile_client
lambda_client_context.custom = {'custom': True}
lambda_client_context.env = {'env': 'test'}
lambda_context = LambdaContext()
lambda_context.function_name = 'function_name'
lambda_context.function_version = 'function_version'
lambda_context.invoked_function_arn = 'invoked_function_arn'
lambda_context.memory_limit_in_mb = 'memory_limit_in_mb'
lambda_context.aws_request_id = 'aws_request_id'
lambda_context.log_group_name = 'log_group_name'
lambda_context.log_stream_name = 'log_stream_name'
lambda_context.identity = lambda_cognito_identity
lambda_context.client_context = lambda_client_context
assert handler({}, lambda_context) == 'something'
.. _mypy: http://mypy-lang.org/
FAQs
AWS Lambda Context class for type checking and testing
We found that aws-lambda-context demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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