How can I have the tests for my Rails app to be executed in a random order?
Is there a simple solution using rake?
Here you go, define this in lib/tasks/tasks.rb
namespace :test do
namespace :randomize do
desc "Randomize tests"
Rake::TestTask.new(:all => "db:test:prepare") do |t|
t.libs << "test"
t.test_files = Rake::FileList[
'test/unit/**/*_test.rb',
'test/functional/**/*_test.rb',
'test/integration/**/*_test.rb'
].shuffle
t.verbose = true
end
end
end
Run: rake test:randomize:all
Keep in mind that within file tests will still be executed in the order they appear. I guess you could monkey patch test unit to allow for that.
You may wish to check out "ZenTest 3.9.0: now with more Evil" (can't do a direct link, use google's cache)
Added ability to set test execution order, defaults to :random. EVIL!
Related
This is my test:
require 'minitest/autorun'
class Foo < Minitest::Test
def test_it
// here
end
end
This is my Rakefile:
Rake::TestTask.new(:test) do |test|
test.libs << 'lib' << 'test'
test.pattern = 'test/**/test_*.rb'
test.verbose = false
test.warning = false
end
I want to have an ability to pass some global configuration parameter from Rakefile to all unit tests. The only way I found so far is through a global variable from test__helper.rb. But Rubocop complains about global variables and I agree with it. Are there any Minitest-friendly solutions?
The easiest and cleanest solution I can think of is through ENV-variables. (Docs)
You just call the tests with:
SOME_VARIABLE=some_value rake test
And in minitest you just do
ENV.fetch('SOME_VARIABLE', default_value)
While the default is optional (but recommended, otherwise you get an error when you want to run the tests without parameter).
I think this is the cleanest solution because unit tests should essentially always work in the same way. The only reason I can think of where you want to change the behaviour of the Unit tests is per envionment (like letting the CI Server run the specs that take longer than usual, having other settings for capybara between different machines etc)
I have all my tests in /test in a ruby project and I need a way to run them all with one command. I came up with this:
task :default => [:test]
task :test do
ruby "test/test_1.rb"
ruby "test/test_2.rb"
end
Which if fine but it runs every single test one at a time rather than showing the overall number of failed vs passed tests.
For the record I am using the native testing ruby framework (eg. Test::Unit::TestCase)
Anyone can help me improve this poor state of affairs?
Thanks
This would do:
require 'rake/testtask'
Rake::TestTask.new do |t|
t.libs = ["lib"]
t.warning = true
t.verbose = true
t.test_files = FileList['test/**/test_*.rb']
end
I am using buildr for some time now, but today I came over a little problem in connection to unit testing of ruby code.
So in my buildfile I have these lines:
define "ruby-project" do
project.version = VERSION_NUMBER
project.group = GROUP
Rake::TestTask.new(:test_rb) do |t|
t.warning = true
t.verbose = true
t.test_files = FileList['test/*.rb']
end
task test => [:test_rb]
end
running buildr test actually runs the tests, what is nice. The test is actually just that:
require 'test/unit'
class TestFileParse < Test::Unit::TestCase
def test_fail
assert(false, 'test to fail')
end
end
As expected it fails, BUT what is strange for me is that buildr quits the build with that message:
sh: 2: Syntax error: Unterminated quoted string
Buildr aborted!
RuntimeError : Command failed with status (1): [/usr/bin/ruby1.9.1 -w -I"lib" -I"/var/lib/...]
Running ruby file-with-failing-test-from-above.rp does not throw a runtime error, instead it prints the test report on screen, what is what is what I want.
Question
How can I make Buildr run the unit tests without quitting with an RuntimeError if a test fails?
Greetings Philipp
Since I am not too familiar with Ruby development, what involves Rake, I was looking for the wrong question. Instead of looking for: »how to run unit test with buildr«, the question should have been »how to run unit tests with rake«, because buildr is a kind of extended Rake (similar to the »maven-ant-relationship«). So everything one can do in Rake, one can do in buildr, too. Therefore on good SO answer to run ruby unit tests in buildr is here.
Additionally it is possible to run RSpec's with buildr, therefore one has two options:
set project.test.using :rspec, what involves the use of JRuby, so one has to set JRUBY_HOME (in my case ~/.rvm/rubies/jruby-1.7.9/), or run buildr within jruby. In my case this slowed test execution down, because each time a jvm needed to be started.
Or one can use rspec's rake task in this manner. I choose this method since my tests run much faster without the jvm overhead.
n.b. as the answer implies, I switched over to rspec.
Happy Testing/Speccing!
rubocop is a code style checker for Ruby. A similar tool to rubocop, Cane, can be integrated with Rake. I prefer rubocop to Cane since rubocop makes checks based on the Ruby Style Guide and it seems to spot more problems. To automate the process of style checking I would like to integrate rubocop with Rake so that the build fails if code quality is lacking.
Gem already supports adding tests to packages via Rake. I would like to do the same with style checks so that style checks are run along with the tests. How can I do this?
If it helps to start with a Rakefile here is one:
# -*- coding: utf-8; mode: ruby -*-
require 'bundler/gem_tasks'
require 'rake/testtask'
Rake::TestTask.new do |t|
t.libs << 'test'
t.test_files = FileList['test/unit/test*.rb']
end
desc 'Run tests'
task default: :test
As of version 0.10.0 rubocop contain a custom rake task that you can use. Just put the following in your Rakefile
require 'rubocop/rake_task'
RuboCop::RakeTask.new
Make sure to use upper-case 'R' and 'C' or you will get a NameError.
I highly recommend,
require 'rubocop/rake_task'
RuboCop::RakeTask.new(:rubocop) do |t|
t.options = ['--display-cop-names']
end
This uses the rubocop's own rake tasks and allows you to pass options if you like.
You will probably find https://github.com/yujinakayama/guard-rubocop useful if you use Guard for your RSpec tests. It enables Rubocop to give you instant feedback as soon as you save the file, along with your test results.
I needed to do something similar myself, and ended up looking in the internal source code of the RuboCop::RakeTask here:
https://github.com/rubocop/rubocop/blob/a34a1c2c2dd1fa6d90ffd06c183421a495a0717c/lib/rubocop/rake_task.rb#L40-L43
require 'rubocop'
cli = CLI.new
puts 'Running RuboCop...' if verbose
result = cli.run(options)
abort('RuboCop failed!') if result.nonzero? && fail_on_error
You can actually invoke similar code directly in your own codebase / rake task.
I ended up writing a little wrapper module I can call to, with some default flags that I always want to be applied:
module RubocopCli
def self.run!(*args)
require "rubocop"
cli = RuboCop::CLI.new
result = cli.run(["--display-cop-names", "--force-exclusion", "--fail-level", "autocorrect", *args])
raise "RubocopCli.run! Linting failed." if result.nonzero?
end
end
Then you can call it with additional args from any task, or app code, like:
files_to_lint = %w[lib/whatever.rb spec/lib/whatever_spec.rb]
RubocopCli.run!("--auto-correct", *files_to_lint)
You can shell out via Rake with the options you prefer:
desc 'Run Rubocop with options'
task rubocop: :environment do
sh 'bundle exec rubocop -D --format offenses --format progress || true'
end
I then recommend modifying the default task to include the output. The trick is to clear the task and then add back what you want. Note the need to end with || true so that an error from Rubocop will not prevent the next task from running. Here's what I do, which also uses parallel tests:
task(:default).clear.enhance ['parallel:parallel_prepare', 'parallel:spec',
'parallel:features', 'lint:rubocop',
'lint:rails_best_practices']
I would recommend shelling out to the rubocop program. It's the simplest solution. Just add this to your Rakefile:
task test: :rubocop
task :rubocop do
sh 'rubocop'
end
I'm new to Ruby, and I've been trying to learn Rake, RSpec, and Cucumber. I found some code that will help me test my Rake tasks, but I'm having trouble getting it to work. I was told here: http://blog.codahale.com/2007/12/20/rake-vs-rspec-fight/ to drop this:
def describe_rake_task(task_name, filename, &block)
require "rake"
describe "Rake task #{task_name}" do
attr_reader :task
before(:all) do
#rake = Rake::Application.new
Rake.application = #rake
load filename
#task = Rake::Task[task_name]
end
after(:all) do
Rake.application = nil
end
def invoke!
for action in task.instance_eval { #actions }
instance_eval(&action)
end
end
instance_eval(&block)
end
end
into my spec_helper.rb file.
I've managed to take this code out and run it in my cucumber steps like this:
When /^I run the update_installers task$/ do
#rake = Rake::Application.new
Rake.application = #rake
load "lib/tasks/rakefile.rb"
#task = Rake::Task["update_installers"]
for action in #task.instance_eval { #actions }
instance_eval(&action)
end
instance_eval(&block)
Rake.application = nil
end
but when I try to get things working in rspec, I get the following error.
ArgumentError in 'Rake task
install_grapevine should install to
the mygrapevine directory'
wrong number of arguments (1 for 2)
/spec/spec_helper.rb: 21:in instance_eval'
/spec/spec_helper.rb: 21:inblock in invoke!'
/spec/spec_helper.rb: 20:in each'
/spec/spec_helper.rb: 20:ininvoke!'
/spec/tasks/rakefile_spec.rb:12:in `block (2 levels) in
'
Unfortunately, I've got just under a week of ruby under by belt, so the metaprogramming stuff is over my head. Could anyone point me in the right direction?
This works for me: (Rails3/ Ruby 1.9.2)
When /^the system does it's automated tasks$/ do
require "rake"
#rake = Rake::Application.new
Rake.application = #rake
Rake.application.rake_require "tasks/cron"
Rake::Task.define_task(:environment)
#rake['cron'].invoke
end
Substitute your rake task name here and also note that your require may be "lib/tasks/cron" if you don't have the lib folder in your load path.
I agree that you should only do minimal work in the Rake task and push the rest to models for ease of testing. That being said I think it's important to ensure that the code is ACTUALLY run in my cron tasks during my integration tests so I think very mild testing of the rake tasks is justified.
Since testing rake is just too much for me, I tend to move this problem around. Whenever I find myself with a long rake task that I want to test, I create a module/class in lib/ and move all the code from the task there. This leaves the task to a single line of Ruby code, that delegates to something more testable (class, module, you name it). The only thing that remains untested is whether the rake task invokes the right line of code (and passes the right parameters), but I think that is OK.
It might be useful to tell us which is the 21nd line of your spec_helper.rb. But given that the approach you posted digs deep in rake (referring to its instance variables), I would entirely abandon it for what I suggested in the previous paragraph.
I've just spent a little while getting cucumber to run a rake task so I thought I'd share my approach. Note: This is using Ruby 2.0.0 and Rake 10.0.4, but I don't think the behaviour has changed since previous versions.
There are two parts to this. The first is easy: with a properly set up instance of Rake::Application then we can access tasks on it by calling #[] (eg rake['data:import']). Once we have a task we can run it by calling #invoke and passing in the arguments (eg rake['data:import'].invoke('path/to/my/file.csv').
The second part is more awkward: properly setting up an instance of Rake::Application to work with. Once we've done require 'rake' we have access to the Rake module. It already has an application instance, available from Rake.application, but it's not yet set up — it doesn't know about any of our rake tasks. It does, however, know where to find our Rakefile, assuming we've used one of the standard file names: rakefile, Rakefile, rakefile.rb or Rakefile.rb.
To load the rakefile we just need to call #load_rakefile on the application, but before we can do that we need to call #handle_options. The call to #handle_options populates options.rakelib with a default value. If options.rakelib is not set then the #load_rakefile method will blow up, as it expects options.rakelib to be enumerable.
Here's the helper I've ended up with:
module RakeHelper
def run_rake_task(task_name, *args)
rake_application[task_name].invoke(*args)
end
def rake_application
require 'rake'
#rake_application ||= Rake.application.tap do |app|
app.handle_options
app.load_rakefile
end
end
end
World(RakeHelper)
Pop that code into a file in features/support/ and then just use run_rake_task in your steps, eg:
When /^I import data from a CSV$/ do
run_rake_task 'data:import', 'path/to/my/file.csv'
end
The behavior might have changed since the correct answer was posted. I was experiencing problems executing two scenarios that needed to run the same rake task (only one was being executed despite me using .execute instead of .invoke). I thought to share my approach to solve the issue (Rails 4.2.5 and Ruby 2.3.0).
I tagged all the scenarios that require rake with #rake and I defined a hook to setup rake only once.
# hooks.rb
Before('#rake') do |scenario|
unless $rake
require 'rake'
Rake.application.rake_require "tasks/daily_digest"
# and require other tasks
Rake::Task.define_task(:environment)
$rake = Rake::Task
end
end
(Using a global variable is suggested here: https://github.com/cucumber/cucumber/wiki/Hooks#running-a-before-hook-only-once)
In the step definition I simply called $rake
# step definition
Then(/^the daily digest task is run$/) do
$rake['collector:daily_digest'].execute
end
Any feedback is welcome.