nginx-lambda-gateway: test framework

[shawnhankim]

As a Product Manager,

I want customers to use NGINX Lambda gateway to securely expose their services as API.

Because customers who are running their services on Serverless platform are increasing, as the customers don’t want to manage the application server infrastructure. AWS Lambda is popular choice for AWS users which helps customers to run their services developed in the different programming languages (Go, Node.JS, Python, Java). There are increasing asks from customers to protect the services hosted in AWS Lambda.

As a Backend Engineer,

I want to ensure that any change of reference implementation doesn't block the existing behavior based on unit-test and integration-test framework.

AC:

• Implement unit-test codes and framework
• Implement integration-test codes and framework
• Implement sand-box environment in Docker containers
• Guidelines (README.md)

Misc.

• Out of scope: end-to-end automation test