anchor.diff:  +
   ```
   {
  -    "id": "9wi991", 
  -    "createdDate": 1482999187
  +    "id": "roqra5", 
  +    "createdDate": 1483575542
   }
   ```
   +
  
positive.code: --statement-id apigateway-test-getall-2 \
  --action lambda:InvokeFunction \
  --principal apigateway.amazonaws.com \
  --source-arn "arn:aws:execute-api:us-west-1:598307997273:lb2qgujjif/test/GET/books"
  ```
  +
  . *Test method*
  +
  ```
  aws apigateway test-invoke-method \
  --rest-api-id lb2qgujjif \
  --resource-id vrpkod \
  --http-method GET
  ```
  +
  
negative.code: +
  ```
  aws apigateway test-invoke-method \
  --rest-api-id 3fsnu7i9k5 \
  --resource-id ds9qul \
  --http-method POST \
  --path-with-query-string "" \
  --body "{\"id\": \"6\", \"bookname\": \"test book\", \"isbn\": \"123\", \"cost\": \"1.23\"}"
  ```
  +
  to see the response
  