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rails--rails/railties
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eileencodes 26821d9b57 Add test parallelization to Rails 
Provides both a forked process and threaded parallelization options. To
use add `parallelize` to your test suite.

Takes a `workers` argument that controls how many times the process
is forked. For each process a new database will be created suffixed
with the worker number; test-database-0 and test-database-1
respectively.

If `ENV["PARALLEL_WORKERS"]` is set the workers argument will be ignored
and the environment variable will be used instead. This is useful for CI
environments, or other environments where you may need more workers than
you do for local testing.

If the number of workers is set to `1` or fewer, the tests will not be
parallelized.

The default parallelization method is to fork processes. If you'd like to
use threads instead you can pass `with: :threads` to the `parallelize`
method. Note the threaded parallelization does not create multiple
database and will not work with system tests at this time.

parallelize(workers: 2, with: :threads)

The threaded parallelization uses Minitest's parallel exector directly.
The processes paralleliztion uses a Ruby Drb server.

For parallelization via threads a setup hook and cleanup hook are
provided.

```
class ActiveSupport::TestCase
  parallelize_setup do |worker|
    # setup databases
  end

  parallelize_teardown do |worker|
    # cleanup database
  end

  parallelize(workers: 2)
end
```

[Eileen M. Uchitelle, Aaron Patterson]
2018-02-15 19:21:24 -05:00
..
bin Adding frozen_string_literal pragma to Railties. 2017-08-14 19:08:09 +02:00
exe Adding frozen_string_literal pragma to Railties. 2017-08-14 19:08:09 +02:00
lib Add test parallelization to Rails 2018-02-15 19:21:24 -05:00
test Add test parallelization to Rails 2018-02-15 19:21:24 -05:00
.gitignore
CHANGELOG.md Start Rails 6.0 development!!! 2018-01-30 18:51:17 -05:00
MIT-LICENSE Bump license years for 2018 2017-12-31 22:36:55 +09:00
railties.gemspec Adding frozen_string_literal pragma to Railties. 2017-08-14 19:08:09 +02:00
Rakefile Run in-app rails commands via fork+load where possible 2017-09-04 20:19:39 +09:30
RDOC_MAIN.rdoc Update RDOC_MAIN.rdoc [ci skip] 2017-08-31 06:00:25 +09:00
README.rdoc Update MIT licenses link [ci skip] 2017-08-22 08:46:02 +09:00

README.rdoc 

= Railties -- Gluing the Engine to the Rails

Railties is responsible for gluing all frameworks together. Overall, it:

* handles the bootstrapping process for a Rails application;

* manages the +rails+ command line interface;

* and provides the Rails generators core.


== Download

The latest version of Railties can be installed with RubyGems:

* gem install railties

Source code can be downloaded as part of the Rails project on GitHub

* https://github.com/rails/rails/tree/master/railties

== License

Railties is released under the MIT license:

* https://opensource.org/licenses/MIT

== Support

API documentation is at

* http://api.rubyonrails.org

Bug reports can be filed for the Ruby on Rails project here:

* https://github.com/rails/rails/issues

Feature requests should be discussed on the rails-core mailing list here:

* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core