Baseline for acceptance tests

[joanlopez]

It sets up the baseline to write acceptance tests.

It..

• Assumes the binary killgrave exists in the system at testing time.
  • So, you need to compile the app before running these tests, and run them as a black box
• Relies on txtar files to simplify test cases definition.

The main testing algorithm is:

• For every directory under acceptance/tests:
  • Creates a temporary directory with files defined at config.txtar (imposters, schemas, responses, etc)
  • Launches the application, specifying the former as the imposters directory
  • For every .txtar file on http directory:
    • It performs the request defined in req.http
    • Asserts the response against the file defined in res.http.

So, it's pretty easy to define multiple acceptance/e2e tests for different imposters.

Further ideas are:

• Read the execution command from a cmd file (or similar)
  • So, we can make the definition of tests even more dynamic (random port, specific config, etc)
• Add support for golden files, so we make the definition of additional test cases even easier (just define request, and record response).

Some open questions are:

• How to integrate it with CI?
• How to differentiate them from other tests (build flag?)

Thanks!