This project contains tests for AWS Lambda functions written in C++. It leverages the AWS SDK for C++ and the AWS Lambda C++ runtime to create, invoke, and verify the behavior of Lambda functions. The project uses the Google Test framework for defining and running the tests.

.
├── gtest/                  
├── resources/
│   ├── CMakeLists.txt
│   └── lambda_function.cpp
├── CMakeLists.txt
├── main.cpp
├── runtime_tests.cpp
├── version_tests.cpp
├── Dockerfile  
├── .dockerignore 
└── README.md

• AWS SDK for C++
• Google Test Framework
• Docker

The project includes a set of unit tests for AWS Lambda functions written in C++. These tests use the AWS SDK for C++ and the Google Test framework to create, invoke, and validate the behavior of the Lambda functions. The main components of the tests are:

• LambdaRuntimeTest Structure: A test fixture that sets up and tears down Lambda functions for testing. It includes methods to create and delete Lambda functions and retrieve IAM role ARNs.
• Test Cases:
  • echo_success: Tests that the function returns the input payload as a successful JSON response.
  • echo_unicode: Tests that the function correctly handles and returns Unicode text.
  • echo_failure: Tests that the function returns an "Unhandled" error.
  • binary_response: Tests that the function returns a binary response of the expected length.
  • crash: Tests that the function throws a runtime error and generates a stack trace.

Each test case ensures the Lambda functions behave as expected under different scenarios, such as success, failure, and error handling. The tests are run in a Docker container to provide a consistent environment.

The following environment variables need to be set for the Docker image in order to create, update, and delete Lambda functions on your AWS account:

• AWS_REGION: AWS region (default: YOUR_AWS_REGION).
• AWS_ACCESS_KEY_ID: AWS access key ID.
• AWS_SECRET_ACCESS_KEY: AWS secret access key.
• LAMBDA_TEST_ROLE: IAM role for the Lambda function (default: YOUR_IAM_ROLE_NAME).
• LAMBDA_PACKAGE_NAME: Name of the Lambda package (default: lambda-test-fun).

docker build -t lambda-test-fun .
docker run --rm -it lambda-test-fun