How to run multiple Rails unit tests at once - ruby-on-rails

Question

I often run the various test groups like:
rake test:units
rake test:functionals
I also like to run individual test files or individual tests:
ruby -Itest test/unit/file_test.rb
ruby -Itest test/unit/file_test.rb -n '/some context Im working on/'
There's also:
rake test TEST=test/unit/file_test.rb
And I've even created custom groupings in my Rakefile:
Rake::TestTask.new(:ps3) do |t|
t.libs << 'test'
t.verbose = true
t.test_files = FileList["test/unit/**/ps3_*_test.rb", "test/functional/services/ps3/*_test.rb"]
end
What I haven't figured out yet is how to run multiple ad-hoc tests at the command line. In other words, how can I inject test_files into the rake task. Something like:
rake test TEST=test/unit/file_test.rb,test/functional/files_controller_test.rb
Then I could run a shell function taking arbitrary parameters and run the fast ruby -Itest single test, or a rake task if there's more than one file.

Answer 1

bundle exec ruby -I.:test -e "ARGV.each{|f| require f}" file1 file1
or:
find test -name '*_test.rb' | xargs -t bundle exec ruby -I.:test -e "ARGV.each{|f| require f}"

Answer 2

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
}

Answer 3

There's a parallel_tests gem that will let you run multiple tests in parallel. Once you have it in your Gemfile, you can just run as ...
bundle exec parallel_test integration/test_*.rb
For me I setup a short rake task to run only the tests I want.

Answer 4

Bash Script
RUBY_MULTI_TEST="/tmp/ruby_multi_test.rb"
function suitup-multi-test-prepare {
sudo rm $RUBY_MULTI_TEST 2> /dev/null
}
function suitup-multi-test-add {
WORK_FOLDER=`pwd`
echo "require '$WORK_FOLDER/$1' " >> $RUBY_MULTI_TEST
}
function suitup-multi-test-status {
cat $RUBY_MULTI_TEST 2> /dev/null
}
function suitup-multi-test-run {
suitup-multi-test-status
ruby -I test/ $RUBY_MULTI_TEST
}
ery#tkpad:rails_app:$ suitup-multi-test-prepare
ery#tkpad:rails_app:$ suitup-multi-test-add test/functional/day_reports_controller_test.rb
ery#tkpad:rails_app:$ suitup-multi-test-add test/functional/month_reports_controller_test.rb
ery#tkpad:rails_app:$ suitup-multi-test-run