RFC for App Test Suite

[apburnes]

In order to improve our confidence in the app platform, we want to write an RFC on how we test

Acceptance Criteria

• A published and discussed RFC for testing the platform
• Create acceptance tests to test app egress rules to demonstrate an initial working version

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Security considerations

none

Implementation sketch

The following should be completed to start the review of the RFC

• Outline goals for the testing suite
• Diagram the workflow
• Document contributing future tests
• Add initial acceptance test to demonstrate workflow

[bengerman13]

The approximate workflow we have in mind:

the test runner should be configured with a matrix of tests. Each test should be an endpoint on a CF web application. The runner should know these things about each test:

• org
• space
• app
• endpoint
• expected http status code
• pattern or string to match http response body

not yet figured out:

• should the runner be responsible for starting these apps?
• should we include during-deployment tests, or just acceptance tests run after cf deploys?
• should tests live in cg-deploy-cf? in separate repos by test app? in a monorepo, but not cg-deploy-cf?

[apburnes]

Closed by #570 and #568