Is it possible to run a single test in MiniTest?

Question

I can run all tests in a single file with:

rake test TEST=path/to/test_file.rb

However, if I want to run just one test in that file, how wo

Answer 1

Following will work

def test_abc
end

test "hello world"
end

This can run by

bundle exec ruby -I test path/to/test -n test_abc

bundle exec ruby -I test path/to/test -n test_hello_word

Answer 2

I'm looking for similar functionality to rspec path/to/file.rb -l 25

Yup! Use Nick Quaranto's "m" gem. With it you can say:

m spec/my_spec.rb:25

Answer 3

The command should be:

% rake test TEST=test/test_foobar.rb TESTOPTS="--name=test_foobar1 -v"

Answer 4

Have you tried:

ruby path/to/test_file.rb --name test_method_name

Answer 5

If you are using MiniTest with Rails 5+ the best way to run all tests in a single file is:

bin/rails test path/to/test_file.rb

And for a single test (e.g. on line 25):

bin/rails test path/to/test_file.rb:25

See http://guides.rubyonrails.org/testing.html#the-rails-test-runner

Answer 6

There are 2 ways to do it:

1. Run tests 'manually' (see Andrew Grimm's answer).
2. Hack Rake::TestTask target to use a different tests loader.

Rake::TestTask (from rake 0.8.7) theoretically is able to pass additional options to MiniTest::Unit with a "TESTOPTS=blah-blah" command line option, for example:

% rake test TEST=test/test_foobar.rb TESTOPTS="--name test_foobar1 -v"

In practice, the option --name (a filter for test names) won't work, due to rake internals. To fix that you'll need to write a small monkey patch in your Rakefile:

# overriding the default rake tests loader
class Rake::TestTask
  def rake_loader
    'test/my-minitest-loader.rb'
  end
end

# our usual test terget 
Rake::TestTask.new {|i|
  i.test_files = FileList['test/test_*.rb']
  i.verbose = true 
}

This patch requires you to create a file test/my-minitest-loader.rb:

ARGV.each { |f|
  break if f =~ /^-/
  load f
}

To print all possible options for Minitest, type

% ruby -r minitest/autorun -e '' -- --help