Appraisals in clearance-1.16.1 vs Appraisals in clearance-1.16.2

@@ -1,29 +1,15 @@
-if RUBY_VERSION < "2.2.0"
-  appraise 'rails32' do
-    gem 'rails', '~> 3.2.21'
-  end
-end
+rails_versions = %w(
+  4.2
+  5.0
+  5.1
+  5.2
+)
 
-appraise 'rails40' do
-  gem 'rails', '~> 4.0.13'
-  gem 'test-unit'
-  gem 'mime-types', '~> 2.99'
-end
-
-appraise 'rails41' do
-  gem 'rails', '~> 4.1.9'
-  gem 'mime-types', '~> 2.99'
-end
-
-appraise 'rails42' do
-  gem 'rails', '~> 4.2.0'
-  gem 'mime-types', '~> 2.99'
-end
-
-if RUBY_VERSION >= "2.2.0"
-  appraise "rails50" do
-    gem "rails", "~> 5.0.0.beta3"
-    gem "rails-controller-testing"
-    gem "rspec-rails", "~> 3.5.0.beta1"
+rails_versions.each do |version|
+  appraise "rails_#{version}" do
+    gem "railties", "~> #{version}.0"
+    if Gem::Version.new(version) >= Gem::Version.new("5.0")
+      gem "rails-controller-testing"
+    end
   end
 end