Which solution will meet these requirements?
Create sample events based on the Lambda documentation. Create automated test scripts that use the cdk local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.
Install a unit testing framework that reproduces the Lambda execution environment. Create sample events based on the Lambda documentation. Invoke the handler function by using a unit testing framework. Check the response. Document how to run the unit testing framework for the other developers on the team. Update the CI/CD pipeline to run the unit testing framework.
Install the AWS Serverless Application Model (AWS SAM) CLI tool. Use the sam local generate-event command to generate sample events for the automated tests. Create automated test scripts that use the sam local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.
Create sample events based on the Lambda documentation. Create a Docker container from the Node.js base image to invoke the Lambda functions. Check the response. Document how to run the Docker container for the other developers on the team. Update the CI/CD pipeline to run the Docker container.
Explanations:
While this option suggests using thecdk local invokecommand, it does not fully replicate the Lambda execution environment or provide a robust testing framework, which is essential for simulating the Lambda environment effectively. It also lacks integration with event generation and might not provide a seamless experience for other developers.
This option proposes using a unit testing framework to invoke the Lambda function directly, but it does not simulate the Lambda execution environment closely enough. Unit testing frameworks typically do not provide the same context or environment that Lambda functions operate in, which can lead to discrepancies between local and deployed behavior.
This option effectively utilizes the AWS SAM CLI, which is specifically designed to simulate the AWS Lambda environment locally. Thesam local generate-eventcommand allows for the creation of realistic event inputs, andsam local invokeaccurately replicates the Lambda invocation process. This solution also supports integration into the CI/CD pipeline, making it easier for other developers to run the tests locally.
Although using Docker can simulate the execution environment to some extent, this option lacks the streamlined process provided by tools like AWS SAM CLI for generating events and invoking functions. Additionally, it would require more manual setup and may not be as user-friendly for developers who need to run tests locally.
I map out that the answer is:
Install the AWS Serverless Application Model (AWS SAM) CLI tool. Use the sam local generate-event command to generate sample events for the automated tests. Create automated test scripts that use the sam local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.