EventLoader unable to correctly deserialize posted json body data for APIGateway events

[bakerhaasis]

Using aws-lambda-java-tests v 1.1.1 and attempting to write a unit test for my lambda function handler (integrated with API Gateway).

Here is a snippet from my junit test - attempting to load a test event to pass to the handler function:

APIGatewayV2HTTPEvent event = EventLoader.loadApiGatewayHttpEvent("events/broken.json");

//proceed to pass the event to the function handler

The contents of the file 'broken.json' are as follows :

{
  "version": "2.0",
  "headers": {
    "content-type":"application/json"
  },
  "requestContext": {
    "accountId": "123456789012",
    "apiId": "api-id"
    }
  ,
  "body": {
  	"firstName":"John",
  	"lastName":"Doe",
  	"nickName":"Jonny D"
  },
  "isBase64Encoded": false
}

All the documentation and examples I've found only use a string as the body, but this is a fairly common use case (an HTTP API accepting json data into a POST for updating information). From above, the body has a simple json object structure representing a person. Because the APIGatewayV2HTTPEvent defines the body as a string, the EventLoader fails with the following exception:

java.io.UncheckedIOException: com.amazonaws.lambda.thirdparty.com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.lang.String` out of START_OBJECT token
 at [Source: (BufferedInputStream); line: 11, column: 11] (through reference chain: com.amazonaws.services.lambda.runtime.events.APIGatewayV2HTTPEvent["body"])

What am I missing here? Is this a deficiency in the EventLoader class, or am I attempting to test this behavior in the wrong way?

[msailes]

When you use API Gateway and Lambda now, does the body come as base64 encoded?

[bakerhaasis]

If you mean whether it is base64 encoded when I call through the API Gateway to the deployed version in AWS, no - I am logging the event from within the lambda and it shows isBase64Encoded: false
As a side note, the lambda works fine deployed to AWS - it is able to parse the input without problem. However, the EventLoader has problems in my unit test code when trying to replicate the event.