To test a deployed Lambda, you can run the following command:

$ aws lambda invoke --invocation-type Event 
  --function-name lambda-dynamo-data-api-sam  --region eu-west-1 
  --payload file://../../sample_data/request-api-gateway-get-valid.json  outputfile.tmp 

To automate it, we can put the following code into a shell script, serverless-microservice-data-api/bash/apigateway-lambda-dynamodb/invoke-lambda.sh:

#!/bin/sh
. ./common-variables.sh
rm outputfile.tmp
status_code=$(aws lambda invoke --invocation-type RequestResponse 
    --function-name ${template}-sam --region ${region} 
    --payload file://../../sample_data/request-api-gateway-get-valid.json 
    outputfile.tmp --profile ${profile})
echo "$status_code"
if echo "$status_code" | grep -q "200";
then
    cat outputfile.tmp
    if grep -q error outputfile.tmp;
    then
        echo "
error in response"
        exit 1
    else
        echo "
pass"
        exit 0
    fi
else
    echo "
error status not 200"
    exit 1
fi 

We invoke the Lambda, but also check the response given in the outputfile.tmp file using the grep command. We return an exit code of 1 if an error is detected, and 0 otherwise. This allows you to chain logic when involved by other tools or by CI/CD steps.