Steps that was done to create this project:

Beginning

New rails project from the scratch

rails new multiple-modules-with-guard

RSpec

Added rspec-rails to the Gemfile

group :test, :development do
  gem 'rspec-rails'
end

rails generate rspec:install

Notice there is now rails_helper and spec_helper by default:

• spec_helper doesn't load environment (you can require it in tests which doesn't require whole env, to make it run faster)
• rails_helper does load environment

Model and test

Simple model Foo

class Foo
end

Simple test for Foo

require 'rails_helper'

describe Foo do
  it { expect(true).to be true }
end

Guard with spring

Configured guard-rspec with spring

In the Gemfile:

group :development do
  gem 'spring'
  gem 'guard-rspec', require: false
  gem 'spring-commands-rspec'
end

And in console:

guard init rspec

spring binstub rspec

Edited generated Guardfile

guard :rspec, cmd: 'bundle exec spring rspec' do
 # ...
end

Sometimes you need to reload spring to make them see your binstubs - run then spring stop

Module with separate test suite

Now I've added moduleA - module with the seperate test suite.

Model (moduleA/models/a_foo.rb):

class AFoo
end

And a test (moduleA/spec/models/a_foo_spec.rb):

require 'spec_helper'
require './models/a_foo'

describe AFoo do
  it "is true for a AFoo" do
    expect(true).to be false
  end
end

Using chdir guard option in the Guardfile

[['.', ''], ['moduleA', 'moduleA/']].each do |dir, prefix|
  guard :rspec,
  chdir: dir,
  cmd: "cd #{dir} && bundle exec spring rspec" do

  watch(%r{^#{prefix}(.+)\.rb$})
  watch(%r{^#{prefix}lib/(.+)\.rb$}) { |m| "spec/lib/#{m[1]}_spec.rb" }
  watch("#{prefix}spec/spec_helper.rb") { "spec" }

  # Rails example
  watch(%r{^#{prefix}app/(.+)\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
  watch(%r{^#{prefix}(.+)\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
  watch(%r{^#{prefix}app/(.*)(\.erb|\.haml|\.slim)$}) { |m| "spec/#{m[1]}#{m[2]}_spec.rb" }
  watch(%r{^#{prefix}app/controllers/(.+)_(controller)\.rb$}) { |m| ["spec/routing/#{m[1]}_routing_spec.rb", "spec/#{m[2]}s/#{m[1]}_#{m[2]}_spec.rb", "spec/acceptance/#{m[1]}_spec.rb"] }
  watch(%r{^#{prefix}spec/support/(.+)\.rb$}) { "spec" }
  watch("#{prefix}config/routes.rb") { "spec/routing" }
  watch("#{prefix}app/controllers/application_controller.rb") { "spec/controllers" }
  watch("#{prefix}spec/rails_helper.rb") { "spec" }

  # Capybara features specs
  watch(%r{^#{prefix}app/views/(.+)/.*\.(erb|haml|slim)$}) { |m| "spec/features/#{m[1]}_spec.rb" }

  # Turnip features and steps
  watch(%r{^#{prefix}spec/acceptance/(.+)\.feature$})
  watch(%r{^#{prefix}spec/acceptance/steps/(.+)_steps\.rb$}) { |m| Dir[File.join("**/#{m[1]}.feature")][0] || 'spec/acceptance' }
end

There are 4 important things there:

• chdir option passed to guard method
• change in cmd - guard needs to change directory to execute your tests in moduleA
• prefix needs to be added to every pattern
• everything is done in the loop for every test suite

New option is not released yet, so for now you need to use guard gems from the Github repo.

gem 'guard', git: '[email protected]:guard/guard.git'
gem 'guard-rspec', git: '[email protected]:guard/guard-rspec.git'

And add configuration required for spring in moduleA/config/spring.rb:

Spring.application_root = "../"

It works :)