feat(event_handler): Add new EventHandler for Async Lambda

[sinofseven]

Issue number: #5627

Summary

Add AsyncTriggerResolver.

Changes

Please provide a summary of what's being changed

Added EventHandler for asynchronous Lambda execution.

User experience

Please share what the user experience looks like before and after this change

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Disclaimer: We value your time and bandwidth. As such, any pull requests created on non-triaged issues might not be successful.

[boring-cyborg]

Thanks a lot for your first contribution! Please check out our contributing guidelines and don't hesitate to ask whatever you need.
In the meantime, check out the #python channel on our Powertools for AWS Lambda Discord: Invite link

[anafalcao]

Hi @sinofseven! Thank you so much for opening this PR. Do you need any help here?

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sinofseven]

Hi, @anafalcao!

Thanks very much for your suggestion!

I have a few problems at the moment.
I am hoping to discuss these with you.

• What must be done in tests other than unit tests
• Regarding the test case for the unit test.

What must be done in tests other than unit tests

For the EventHandler implementation I am creating, I believe that the event samples provided for unit testing of data_classes are sufficient for testing.

However, the EventHandler test for API Gateway implements E2E testing.
I am wondering if it is necessary to implement E2E tests for the EventHandler I am creating.

Regarding the test case for the unit test

The unit test attempted to check all cases, including correct and incorrect values for all arguments of each Route class, as well as the presence or absence of arguments.

Therefore, in creating the test, I wrote all the patterns of the test case in a Google Spreadsheet.

https://docs.google.com/spreadsheets/d/1eioW7rALlFdkv2Q0y8ERZnMnJuJK3QWoPfhoJMTlqaA/edit?usp=sharing

Following this, I implemented a unit test in tests/unit/event_handler/_async_execution/_routes/test_aws_config_rule.py.
(The other tests were created before we properly managed the test cases.)

Here is where I ran into a problem: I had a very large number of test cases in having many arguments Route class.
(For example, we found that the S3Route class with 9 arguments requires just under 20,000 test cases.)

Therefore, I am wondering how far to describe the test cases.