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Deferred execution (2014) #1124

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Deferred execution (2014) #1124

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reid
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@reid reid commented Feb 3, 2014

This is @tarruda's #719 pull request from last year updated to cleanly merge. All tests pass.

From the original request:

This should solve issue #362.

A global 'wait' function is added so the test files can pause mocha processing and generate
tests asynchronously. The function returns a semaphore with a single method 'resume' to continue processing test files.

@travisjeffery This pull request implements TJ's suggestion for fixing #362 and includes a test. Can this be included in Mocha? Deferred execution has inspired Mocha forks and prevents test runners like Yeti from running async-defined Mocha tests. Thank you!

/cc @alex-seville

tarruda and others added 2 commits January 17, 2013 08:38
@tarruda
Added global 'wait' function to defer tests
c234bbc 
This function signals mocha to pause processing files while tests are
generated asynchronously.

For this to work, a few changes were required in the Mocha and Runner classes:

- In the Mocha class, the 'loadFiles' method was refactored to work
  asynchonously.
- In the Runner class, the globals initialization was moved out of the
  constructor into a new method: 'initDefaultGlobals'. This method needs
  to be invoked prior to running the tests, so the runner will take a
  'snapshot' of the global properties.

This commit should also solve issue mochajs#362
@reid
Merge branch 'master' of github.com:tarruda/mocha into deferred-exec
2b27fdb 
Conflicts:
	lib/mocha.js
	lib/runner.js
@travisjeffery
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looks good mostly, i'm not so sure about having the wait fn on global

@alex-seville
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👍

This will help address some compatibility issues in Blanket as well.

The wait fn does get removed from global, fwiw - https://github.com/visionmedia/mocha/pull/1124/files#diff-aa849a970cef551664c12f04a4209f6fR188.

@alex-seville alex-seville mentioned this pull request Feb 8, 2014
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@alex-seville
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Bump?

@NickHeiner
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This would be nice to have. On my team, we basically have a rule to never generate tests asynchronously because it isn't supported.

@chrismeyersfsu
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Bump

@nnnnathann
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Also, bump.

@arcanis
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arcanis commented Jun 22, 2014

The PR doesn't seem too big. Is there something holding the merge, @visionmedia ?

@jbnicolai
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@travisjeffery any objections to merging?

@travisjeffery
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i'd rather add an option to Mocha and then use the existing run api. same with tj

@reid
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reid commented Jul 18, 2014

@travisjeffery How would we set this "async" Mocha option on a per-test basis (or browser usage)? mocha.wait(), which returns the semaphore?

By "existing run api" I assume you mean mocha.run()? I think it makes more sense to call resume on the object returned by something like wait() or mocha.wait(). Am I mistaken? (I didn't find anything in the documentation page linked from the README, but that's what TJ mentioned 2 years ago.)

@boneskull boneskull added the status: waiting for author waiting on response from OP - more information needed label Oct 17, 2014
@okv
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okv commented Oct 28, 2014

bump

@okv
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okv commented Oct 29, 2014

It's really very usefull feature when you need to do some async stuff (e.g. get test data from db which will be used at describe labels) before test will be loaded by mocha. Do you have any plans about merging it into master?

@boneskull boneskull added Duplicate and removed status: waiting for author waiting on response from OP - more information needed labels Nov 21, 2014
@boneskull boneskull closed this Nov 21, 2014
@boneskull
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this won't get merged; see #1439

@dasilvacontin dasilvacontin mentioned this pull request Feb 10, 2015
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boneskull pushed a commit to boneskull/mocha that referenced this pull request Feb 16, 2015
add ability to delay root suite; closes mochajs#362, closes mochajs#1124
b4312b0 


modifies http tests to avoid race conditions
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