Running Ruby Unit Tests with Rake

Running Ruby unit tests with Rake

Use Rake::TestTask http://rake.rubyforge.org/classes/Rake/TestTask.html . Put this into your Rake file and then run rake test:

require 'rake/testtask'

Rake::TestTask.new do |t|
  t.libs << "test"
  t.test_files = FileList['test/test*.rb']
  t.verbose = true
end

How do I execute a single test using Ruby test/unit?

you can pass the -n option on the command line to run a single test:

ruby my_test.rb -n test_my_method

where 'test_my_method' is the name of the test method you would like to run.

How to run a single test from a Rails test suite?

NOTE: This doesn't run the test via rake. So any code you have in Rakefile will NOT get executed.

To run a single test, use the following command from your rails project's main directory:

ruby -I test test/unit/my_model_test.rb -n test_name

This runs a single test named "name", defined in the MyModelTest class in the specified file. The test_name is formed by taking the test name, prepending it with the word "test", then separating the words with underscores. For example:

class MyModelTest < ActiveSupport::TestCase
  test 'valid with good attributes' do
    # do whatever you do
  end

  test 'invalid with bad attributes' do
    # do whatever you do
  end
end

You can run both tests via:

ruby -I test test/unit/my_model_test.rb

and just the second test via

ruby -I test test/unit/my_model_test.rb -n test_invalid_with_bad_attributes

Test a specific group of testcases with rake testtask

I've figured out how to associate the different testtask with different rake task. The trick is adding a task name while creating a new testtask. Like this,

Rake::TestTask.new(:default) do |t|
  t.test_files = FileList['test/test_*.rb']
end

Rake::TestTask.new(:internet) do |t|
  t.test_files = FileList['test/itest_*.rb']
end

desc "No internet connection required"
task :default => :test

desc "Needs internet connection"
task :internet => :test

So rake internet will just run the test cases that need internet connections.

How to run multiple Rails unit tests at once

I ended up hacking this into my RakeFile myself like so:

Rake::TestTask.new(:fast) do |t|
  files = if ENV['TEST_FILES']
    ENV['TEST_FILES'].split(',')
  else
    FileList["test/unit/**/*_test.rb", "test/functional/**/*_test.rb", "test/integration/**/*_test.rb"]
  end

  t.libs << 'test'
  t.verbose = true
  t.test_files = files
end
Rake::Task['test:fast'].comment = "Runs unit/functional/integration tests (or a list of files in TEST_FILES) in one block"

Then I whipped up this bash function that allows you to call rt with an arbitrary list of test files. If there's just one file it runs it as ruby directly (this saves 8 seconds for my 50k loc app), otherwise it runs the rake task.

function rt {
  if [ $# -le 1 ] ; then
    ruby -Itest $1
  else
    test_files = ""
    while [ "$1" != "" ]; do
      if [ "$test_files" == "" ]; then
        test_files=$1
      else
        test_files="$test_files,$1"
      fi
      shift
    done
    rake test:fast TEST_FILES=$test_files
  fi
}

Run all models tests using rake task

The pattern you are looking for is "test/models/**/*_test.rb". The "**" will match subdirectories as well.

If you are using minitest-rails then you have lots of tasks added for you. To run all Model tests run:

rake minitest:models

To see all the rake tasks creates for you, run:

rake -T

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