Use Appraisal to test against multiple versions

.gitignore

@@ -2,3 +2,4 @@ Gemfile.lock
 bin
 .bundle
 *.gem
+*.gemfile.lock

.travis.yml

@@ -10,10 +10,11 @@ rvm:
   - jruby-19mode
 
 gemfile:
-  - gemfiles/activesupport3.2
-  - gemfiles/activesupport4.0
-  - gemfiles/dalli1.1
-  - gemfiles/dalli2
+  - gemfiles/activesupport3.2.gemfile
+  - gemfiles/activesupport4.0.gemfile
+  - gemfiles/activesupport4.1.gemfile
+  - gemfiles/dalli1.1.gemfile
+  - gemfiles/dalli2.gemfile
 
 services:
   - redis

Appraisals

@@ -0,0 +1,19 @@
+appraise 'activesupport3.2' do
+  gem 'activesupport', '~> 3.2.0'
+end
+
+appraise 'activesupport4.0' do
+  gem 'activesupport', '~> 4.0.0'
+end
+
+appraise 'activesupport4.1' do
+  gem 'activesupport', '~> 4.1.0'
+end
+
+appraise 'dalli1.1' do
+  gem 'dalli', '1.1.5'
+end
+
+appraise 'dalli2' do
+  gem 'dalli', '~> 2.0'
+end

gemfiles/activesupport3.2

@@ -1,4 +0,0 @@
-source "https://rubygems.org"
-gemspec path: '../'
-
-gem 'activesupport', '~> 3.2.0'

gemfiles/activesupport3.2.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activesupport", "~> 3.2.0"
+
+gemspec :path => "../"

gemfiles/activesupport4.0

@@ -1,4 +0,0 @@
-source "https://rubygems.org"
-gemspec path: '../'
-
-gem 'activesupport', '~> 4.0.0'

gemfiles/activesupport4.0.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activesupport", "~> 4.0.0"
+
+gemspec :path => "../"

gemfiles/activesupport4.1.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activesupport", "~> 4.1.0"
+
+gemspec :path => "../"

gemfiles/dalli1.1

@@ -1,4 +0,0 @@
-source "https://rubygems.org"
-gemspec path: '../'
-
-gem 'dalli', '~> 1.1.5'

gemfiles/dalli1.1.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "dalli", "1.1.5"
+
+gemspec :path => "../"

gemfiles/dalli2

@@ -1,4 +0,0 @@
-source "https://rubygems.org"
-gemspec path: '../'
-
-gem 'dalli', '~> 2.7'

gemfiles/dalli2.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "dalli", "~> 2.0"
+
+gemspec :path => "../"

rack-attack.gemspec

@@ -26,6 +26,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'rack-test'
   s.add_development_dependency 'rake'
+  s.add_development_dependency 'appraisal'
   s.add_development_dependency 'activesupport', '>= 3.0.0'
   s.add_development_dependency 'redis-activesupport'
   s.add_development_dependency 'dalli'