Feature: Designate which 'outputs' to live test

[ryandeivert]

Background

The live-test CLI command supports sending to defined outputs for a rule being tested. By default, this command will not mock out any of the outputs and will try to send the test alert to each one (aws/slack/pagerduty/etc).

Desired Change

Make it easier to send to only one type of service when invoking the live-test command. This would allow testing services like Slack without having to test AWS services. This would have to perform some selective mocking of outputs (see here and here).

[0xdabbad00]

Note as mentioned in the Slack https://streamalert.slack.com/archives/C3BHE2Z0S/p1508539616000067 HTTPS requests are converted to HTTP due to moto using httpretty, which has this issue: https://github.com/gabrielfalcao/HTTPretty/issues/35

The workaround I've personally used is before making my HTTPS requests, I call:

from httpretty import HTTPretty
HTTPretty.disable()

[0xdabbad00]

Some other things I did to test this:

• Set required=False at https://github.com/airbnb/streamalert/blob/6a52f6a7950d51f85411e70f7e84f18de5320449/manage.py#L155
• Set pass # self.setup_outputs(alert) at https://github.com/airbnb/streamalert/blob/a9e7d3c2724a86970576bde3db3e7f2e64ec22bc/stream_alert_cli/test.py#L621
• Comment out https://github.com/airbnb/streamalert/blob/0b1ad9f689b8d045eb1a079d5ec5c88c4a64c68a/stream_alert/alert_processor/outputs.py#L470 and set creds to my Slack webhook.