Gemfile in ransack-1.5.1 vs Gemfile in ransack-1.6.0

@@ -3,37 +3,48 @@
 
 gem 'rake'
 
 rails = ENV['RAILS'] || 'master'
 
-if rails[0,3] == '4.2' || rails == 'master'
-  gem 'arel', github: 'rails/arel', branch: 'master'
+if rails == 'master'
+  gem 'arel', github: 'rails/arel'
 end
 
 gem 'polyamorous', '~> 1.1'
 
+gem 'pry'
+
 # Provide timezone information on Windows
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]
 
 case rails
 when /\// # A path
   gem 'activesupport', path: "#{rails}/activesupport"
-  gem 'activerecord', path: "#{rails}/activerecord"
+  gem 'activerecord', path: "#{rails}/activerecord", require: false
   gem 'actionpack', path: "#{rails}/actionpack"
 when /^v/ # A tagged version
   git 'git://github.com/rails/rails.git', :tag => rails do
     gem 'activesupport'
     gem 'activemodel'
-    gem 'activerecord'
+    gem 'activerecord', require: false
     gem 'actionpack'
   end
 else
   git 'git://github.com/rails/rails.git', :branch => rails do
     gem 'activesupport'
     gem 'activemodel'
-    gem 'activerecord'
+    gem 'activerecord', require: false
     gem 'actionpack'
   end
   if rails == '3-0-stable'
     gem 'mysql2', '< 0.3'
   end
+end
+
+if ENV['DB'] =~ /mongodb/
+  gem 'mongoid', '~> 4.0.0', require: false
+end
+
+# Removed from Ruby 2.2 but needed for testing Rails 3.x.
+group :test do
+  gem 'test-unit', '~> 3.0' if RUBY_VERSION >= '2.2'
 end