Test with Rails HEAD

.travis.yml

@@ -2,6 +2,7 @@ language: ruby
 rvm:
   - 2.1.5
 gemfile:
+  - test/gemfiles/rails_head.gemfile
   - test/gemfiles/sass_3_3.gemfile
   - test/gemfiles/sass_3_4.gemfile
   - test/gemfiles/sass_head.gemfile
@@ -9,6 +10,7 @@ before_install:
   - "npm install"
 matrix:
   allow_failures:
+    - gemfile: test/gemfiles/rails_head.gemfile
     - gemfile: test/gemfiles/sass_head.gemfile
 notifications:
   slack: heybb:3n88HHilXn76ji9vV4gL819Y

Rakefile

@@ -10,6 +10,36 @@ Rake::TestTask.new do |t|
   t.verbose = true
 end
 
+desc 'Test all Gemfiles from test/*.gemfile'
+task :test_all_gemfiles do
+  require 'term/ansicolor'
+  require 'pty'
+  require 'shellwords'
+  cmd      = 'bundle install --quiet && bundle exec rake --trace'
+  statuses = Dir.glob('./test/gemfiles/*{[!.lock]}').map do |gemfile|
+    env = {'BUNDLE_GEMFILE' => gemfile}
+    cmd_with_env = "  (#{env.map { |k, v| "export #{k}=#{Shellwords.escape v}" } * ' '}; #{cmd})"
+    $stderr.puts Term::ANSIColor.cyan("Testing\n#{cmd_with_env}")
+    PTY.spawn(env, cmd) do |r, _w, pid|
+      begin
+        r.each_line { |l| puts l }
+      rescue Errno::EIO
+        # Errno:EIO error means that the process has finished giving output.
+      ensure
+        ::Process.wait pid
+      end
+    end
+    [$? && $?.exitstatus == 0, cmd_with_env]
+  end
+  failed_cmds = statuses.reject(&:first).map { |(_status, cmd_with_env)| cmd_with_env }
+  if failed_cmds.empty?
+    $stderr.puts Term::ANSIColor.green('Tests pass with all gemfiles')
+  else
+    $stderr.puts Term::ANSIColor.red("Failing (#{failed_cmds.size} / #{statuses.size})\n#{failed_cmds * "\n"}")
+    exit 1
+  end
+end
+
 desc 'Dumps output to a CSS file for testing'
 task :debug do
   require 'sass'

test/dummy_rails/config/application.rb

@@ -12,13 +12,13 @@ end
 
 require 'slim-rails'
 require 'jquery-rails'
-require 'compass'
 require 'bootstrap-sass'
 require 'uglifier'
 
 module Dummy
   class Application < Rails::Application
     config.assets.enabled = true if config.assets.respond_to?(:enabled)
+    config.assets.precompile += %w( application.css application.js )
     config.to_prepare do
       if ENV['VERBOSE']
         STDERR.puts "Loaded Rails #{Rails::VERSION::STRING}, Sprockets #{Sprockets::VERSION}",

test/gemfiles/rails_head.gemfile

@@ -0,0 +1,17 @@
+source "https://rubygems.org"
+
+gem 'actionpack', github: 'rails/rails'
+gem 'activesupport', github: 'rails/rails'
+
+# Required git dependencies as per https://github.com/rails/rails/blob/51211a94bd7a34d80f2412a7f94fefe7366647a5/Gemfile:
+gem 'rack', github: 'rack/rack'
+gem 'sprockets', github: 'rails/sprockets'
+gem 'sprockets-rails', github: 'rails/sprockets-rails'
+gem 'sass-rails', github: 'rails/sass-rails', branch: 'master'
+
+gem 'autoprefixer-rails', github: 'ai/autoprefixer-rails'
+
+gem 'compass', '~> 1.0.1', require: false
+
+gemspec path: '../../'
+

test/support/reporting.rb

@@ -14,4 +14,14 @@ module Kernel
       run.call
     end
   end
+
+  def silence_stream(stream)
+    old_stream = stream.dup
+    stream.reopen(File::NULL)
+    stream.sync = true
+    yield
+  ensure
+    stream.reopen(old_stream)
+    old_stream.close
+  end unless method_defined?(:silence_stream)
 end