Testing Our Rate Limiter

Rate limiters will limit the number of concurrent requests we can process at a given time. Let’s write a test case for the same to check whether our rate limiter works as expected.

Making our API call

First, we will create a function that can make an API call to our server. We would want to know whether the API call succeeded and whether we received a 200 response. If we received a 429 response instead, it would imply that our rate limiter had kicked in! Our function will also accept a count to keep track of which iteration of our API call succeeded or failed and WaitGroup to be able to notify the caller that this API call is done.