2018. június 2., szombat

Testing AWS Lambda function which uses S3 using Mocha and Sinon

I've been seeking through the interwebz to find a good tutorial on testing an AWS lambda function which uses it's S3 API, so here we go, this is my take on it.
The key idea behind it is to have a 4th default argument which is going to be a Sinon spy at the test, just to mock S3's behaviour. Here we go, there is the solution I came up:

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