Spread your tests over multiple machines to test your code faster.
Hydra is a distributed testing framework. It allows you to distribute your tests locally across multiple cores and processors, as well as run your tests remotely over SSH.
Hydra's goals are to make distributed testing easy. So as long as you can ssh into a computer and run the tests, you can automate the distribution with Hydra.
In your rakefile:
require 'hydra' require 'hydra/tasks' Hydra::TestTask.new('hydra') do |t| t.add_files 'test/unit/**/*_test.rb' t.add_files 'test/functional/**/*_test.rb' t.add_files 'test/integration/**/*_test.rb' end
$ rake hydra
Hydra defaults to Single Core mode, so you may want to configure it to use two (or more) of your cores if you have a multi-processing machine.
Running Remote Tasks
You can run tasks across all of your remote workers easily with Hydra. In your rake file, add:
Then you can run:
Running Global Tasks
A Global task is a task run locally and remotely. It's used in the same way as RemoteTask:
But it is invoked in a higher namespace:
Place the config file in the main project directory as 'hydra.yml' or 'config/hydra.yml'.
workers: - type: local runners: 2
Dual Core, with a remote Quad Core server
The -p3022 tells it to connect on a different port
workers: - type: local runners: 2 - type: ssh connect: email@example.com ssh_opts: -p3022 directory: /absolute/path/to/project runners: 4
Two Remote Quad Cores with Synchronization
You can use the 'sync' configuration to allow rsync to synchronize the local and remote directories every time you run hydra.
workers: - type: ssh connect: firstname.lastname@example.org directory: /path/to/project/on/alpha/ runners: 4 - type: ssh connect: email@example.com directory: /path/to/project/on/beta/ runners: 4 sync: directory: /my/local/project/directory exclude: - tmp - log - doc
Either “local” or “ssh”.
The runners option is how many processes will be running on the machine. It's best to pick the same number as the number of cores on that machine (as well as your own).
The connect option is passed to SSH. So if you've setup an ssh config alias to a server, you can use that. It is also used in rsync, so you cannot use options.
The ssh_opts option is passed to SSH and to Rsync's RSH so that you can use the same ssh options for connecting and rsync. Use ssh_opts to set the port or compression options.
The directory option is the path for the project directory where the tests should be run.
Hydra comes with a couple of listeners for the events it fires. By default, Hydra::Listener::MinimalOutput is used to display the files being tests and the ./F/E for each file and F/E output.
It also uses Hydra::Listener::ReportGenerator to generate reports of the test files to that it can order them by their run times.
To use another listener, just add a listeners node to the config file. For example, if you are on Ubuntu Linux (or have access to the notify-send command) you can add a notifier listener like this:
listeners: - Hydra::Listener::Notifier.new
Note that if you make a listener node, the default listeners will be overridden, so you will no longer have the standard minimal output unless you do:
listeners: - Hydra::Listener::Notifier.new - Hydra::Listener::MinimalOutput.new
Listeners take one argument to their contstructor: an IO object. So, you can easily output Hydra to a variety of log files. For example:
listeners: - Hydra::Listener::ReportGenerator.new(File.new('/home/ngauthier/Desktop/hydra_log.yml', 'w'))
For more information on Hydra, check out the rdocs:
Copyright © 2010 Nick Gauthier. See LICENSE for details.