jojo

An RSpec runner for a TDD-style workflow: it tracks the specs as you write and edit them and re-runs rspec for you. Sort of like using Guard with rspec with the difference in reporting; jojo can run multiple rspec threads in parallel and consolidate the output into a single report.

Usage

Get it first:

npm install -g jojo

Then run it in the root directory of your (Rails) app (where spec/ and bin/ reside for default Rails apps.)

jojo

Run with --help to see the available options.

Concurrency

It is possible to have jojo distribute the test files to several RSpec processes and run them in parallel. If you do so, it will aggregate the output of all processes and present them in a single report.

You need to have a database for each thread you want to run. jojo will specify the database number in an environment variable TEST_ENV_NUMBER which you should use to switch to the proper db in rspec.

Once you have enough databases set-up, run jojo with the -j flag:

jojo -j 4

Executing specs across multiple processes definitely has a diminishing return; I found the sweet spot to be 4 but YMMV.

Shuffling test files

This option makes jojo shuffle the test files around before it assigns them to the execution threads. The reason why this might be useful is explained below.

If you grep for many specs, they will be run in the order as they appear on the file system and that ordering may not be beneficial for maximum speed; for example, specs under the controllers/ folder might take much longer than ones under helpers/ so if we jam most of the controller specs on the same thread, it will most definitely last longer and you gain less from concurrency.

Obviously, this option is only useful when you're using more than 1 thread.

jojo -j 4 --shuffle -g Account

The above command will run all specs that have anything to do with "Account", shuffle the list of files that match, then distribute them to 4 different threads.

Tuning to the environment

jojo tries to make few assumptions about how you run your specs and where they're located and exposes a few options to tune these:

• the rspec binary to use for launching threads can be specified using --rspec-binary, this defaults to bin/rspec assuming you use Spring with Rails
• the pattern of specs it tracks is defaulted to _spec.rb and can be tuned using --spec-pattern
• you can make jojo watch source files for changes and re-run the specs on such events using --watch-source-pattern

Features

The cache

TODO

Focus mode

TODO

Fail-fast mode

TODO

Grepping

Changelog

1.0.5

• regular STDOUT output from RSpec is now forwarded to the Console section in the reporter
• Ruby errors are now displayed in the Failures section of the reporter
• no longer printing the "Delayed execution; ..." message in the console as there is already an indicator for it in the status bar
• added a text reporter that can be engaged by supplying --reporter text which will not engage the blessed UI

License

The MIT License (MIT)

Copyright (c) 2015 Instructure, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.