moto

Uses Python decorators like @mock_aws to easily wrap test functions, minimizing code changes as shown in the README example with S3.

Maintains the state of AWS resources such as S3 buckets and DynamoDB tables across mocked calls, enabling realistic test scenarios like object storage.

Supports a broad range of AWS services including EC2, S3, and Lambda, with many API operations covered, as indicated by the implementation coverage document.

Allows tests to run without internet access or AWS credentials, eliminating costs and enabling reliable CI/CD pipeline execution, as emphasized in the description.