Write Unit Tests for the `queue` Package

[koladev32]

The queue package plays a vital role in our application, handling the queuing, retries, and exponential backoff logic for webhook deliveries. Comprehensive tests will ensure the reliability and robustness of this component.

Scope:

1. Test ProcessWebhooks:

   • Ensure that sendWebhookWithRetries is invoked for each payload in the webhookQueue.
   • Test with varying numbers of payloads.

2. Test sendWebhookWithRetries:

   • Confirm that retryWithExponentialBackoff is correctly invoked.
   • Ensure logging takes place if a webhook fails after maximum retries.

3. Test calculateBackoff:

   • Validate the calculation of backoff times.
   • Confirm the doubling of backoff until it reaches maxBackoff.

4. Test retryWithExponentialBackoff:

   • Mock the behavior of sender.SendWebhook to simulate both successful sends and failures.
   • Confirm retries happen the expected number of times (maxRetries).
   • Ensure backoff time increases exponentially with each retry.
   • Validate logging behavior at each retry and when maximum retries are reached.