Before/after hooks

[vadimdemedes]

Fixes #4.

Hooks are completely the same as regular tests and provide the same functionality/API.
The only thing different is when they are executed.

Changes

• Add test.before() to execute a test before all others
• Add test.after() to execute a test after all others
• Refactor Runner.prototype.concurrent and Runner.prototype.serial to accept array of tests, instead of getting them directly from this.tests.concurrent and this.tests.serial properties respectively
• Add tests
• Add information about before/after hooks to the readme

Behavior

After this change, here is how Ava runs tests:

1. before hooks
2. serial tests
3. concurrent tests
4. after hooks

Update: If at least one before hook fails, all the following tests won't be executed.

Usage

var test = require('ava');

// shortcuts for convenience
var before = test.before;
var after = test.after;

before('before hook', function (t) {
  // this will run before everything else

  t.end();
});

after('after hook', function (t) {
  // this will run after everything else is completed

  t.end();
});

test('regular test', function (t) {
  t.end();
});

Output:

### Tests

Tests were added to cover new test.before() and test.after() functions.

Let me know what you think!

[Qix-]

;) Might want to do that haha.

[sindresorhus]

Relevant: #38

// @vdemedes

[vadimdemedes]

Yeah, I thought about converting this.serial and this.concurrent to return promises, but decided postpone that. Wanted to hear feedback on a PR and thought that you might not like too much changes at once, haha

[sindresorhus]

Yeah, promisification should be a separate PR.

[vadimdemedes]

I could do that after this PR gets merged (to avoid merge conflicts in commit history), no probs

[Qix-]

Other than the two things I saw (I'm sure @sindresorhus will see something else), it looks good to me. Seems like a clean implementation.

[arthurvr]

before(function (t) { (spacing)

[vadimdemedes]

thanks, will change ;)

[vadimdemedes]

Yeah, looks good to me too, except Runner.prototype.run.

[sindresorhus]

Looks superb to me. Can you fix the merge conflict? :D

[vadimdemedes]

@sindresorhus Yeah, sure, already on it ;)

[sindresorhus]

Excellent! Thanks again @vdemedes for this awesome contribution :)

[vadimdemedes]

@sindresorhus You're welcome! I am really enjoying contributing to ava and got, incredible stuff. Switched almost all my shit to them from request and mocha.

P.S. That gif is amazing :D

[Qix-]

Keep them coming @vdemedes :)