Developers using SAM CLI to author their serverless application with Lambda functions can now create and use Lambda test events to test their function code. Test events are JSON objects that mock the structure of requests emitted by AWS services to invoke a Lambda function and return an execution result, serving to validate a successful operation or to identify errors. Previously, Lambda test events were only available in the Lambda console. With this launch, developers using SAM CLI can create and access a test event from their AWS account and share it with other team members.
Source:: Amazon AWS