Test latest Ruby versions & introduce Appraisals (#251)

* Test latest Ruby versions

* Move to Appraisals

Author: dlackty

.gitignore

@@ -21,5 +21,6 @@
 *.DS_Store
 
 Gemfile.lock
+*.gemfile.lock
 
 /coverage

.travis.yml

@@ -1,17 +1,28 @@
 language: ruby
 rvm:
-  - 2.2.3
-  - 2.3.1
-  # - 2.4.0
+  - 2.2.6
+  - 2.3.3
+  - 2.4.1
 env:
   global:
     - CODECLIMATE_REPO_TOKEN=396d4263adb6febf1e6e9b0c0e176fbde35e1a116a3c1ecf8dd4f9384e41979b
-  matrix:
-    - "AS_VERSION=3.2.0"
-    - "AS_VERSION=4.0.0"
-    - "AS_VERSION=4.1.0"
-    - "AS_VERSION=4.2.0"
-    - "AS_VERSION=5.0.0"
+gemfile:
+  - gemfiles/3.2.gemfile
+  - gemfiles/4.0.gemfile
+  - gemfiles/4.1.gemfile
+  - gemfiles/4.2.gemfile
+  - gemfiles/5.0.gemfile
+matrix:
+  fast_finish: true
+  exclude:
+    - rvm: 2.4.1
+      gemfile: gemfiles/3.2.gemfile
+    - rvm: 2.4.1
+      gemfile: gemfiles/4.0.gemfile
+    - rvm: 2.4.1
+      gemfile: gemfiles/4.1.gemfile
+    - rvm: 2.4.1
+      gemfile: gemfiles/4.2.gemfile
 # We need to install latest version of bundler, because one in travis
 # image is too old to recognize platform => :mri_22 in Gemfile.
 before_install:

Appraisals

@@ -0,0 +1,20 @@
+appraise '3.2' do
+  gem 'activesupport', '~> 3.2.22'
+  gem 'minitest', '~> 5'
+end
+
+appraise '4.0' do
+  gem 'activesupport', '~> 4.0.13'
+end
+
+appraise '4.1' do
+  gem 'activesupport', '~> 4.1.14'
+end
+
+appraise '4.2' do
+  gem 'activesupport', '~> 4.2.5.1'
+end
+
+appraise '5.0' do
+  gem 'activesupport', '~> 5.0.0'
+end

Gemfile

@@ -3,24 +3,11 @@ source "https://rubygems.org"
 gemspec
 
 gem 'rake'
+gem 'appraisal'
 
-as_version = ENV["AS_VERSION"] || "default"
-
-as_version = case as_version
-when "default"
-  ">= 3.2.0"
-else
-  "~> #{as_version}"
-end
-
-gem "activesupport", as_version
+gem "activesupport"
 gem 'addressable', '~> 2.2'
 
-# 3.2 now requires the minitest gem
-if as_version =~ /3\.2\./
-  gem "minitest", '~> 5'
-end
-
 gem "codeclimate-test-reporter", group: :test, require: nil
 
 group :development, :test do

gemfiles/3.2.gemfile

@@ -0,0 +1,16 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rake"
+gem "appraisal"
+gem "activesupport", "~> 3.2.22"
+gem "addressable", "~> 2.2"
+gem "codeclimate-test-reporter", :group => :test, :require => nil
+gem "minitest", "~> 5"
+
+group :development, :test do
+  gem "byebug", :platforms => [:mri_20, :mri_21, :mri_22]
+end
+
+gemspec :path => "../"

gemfiles/4.0.gemfile

@@ -0,0 +1,15 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rake"
+gem "appraisal"
+gem "activesupport", "~> 4.0.13"
+gem "addressable", "~> 2.2"
+gem "codeclimate-test-reporter", :group => :test, :require => nil
+
+group :development, :test do
+  gem "byebug", :platforms => [:mri_20, :mri_21, :mri_22]
+end
+
+gemspec :path => "../"

gemfiles/4.1.gemfile

@@ -0,0 +1,15 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rake"
+gem "appraisal"
+gem "activesupport", "~> 4.1.14"
+gem "addressable", "~> 2.2"
+gem "codeclimate-test-reporter", :group => :test, :require => nil
+
+group :development, :test do
+  gem "byebug", :platforms => [:mri_20, :mri_21, :mri_22]
+end
+
+gemspec :path => "../"

gemfiles/4.2.gemfile

@@ -0,0 +1,15 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rake"
+gem "appraisal"
+gem "activesupport", "~> 4.2.5.1"
+gem "addressable", "~> 2.2"
+gem "codeclimate-test-reporter", :group => :test, :require => nil
+
+group :development, :test do
+  gem "byebug", :platforms => [:mri_20, :mri_21, :mri_22]
+end
+
+gemspec :path => "../"

gemfiles/5.0.gemfile

@@ -0,0 +1,15 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rake"
+gem "appraisal"
+gem "activesupport", "~> 5.0.0"
+gem "addressable", "~> 2.2"
+gem "codeclimate-test-reporter", :group => :test, :require => nil
+
+group :development, :test do
+  gem "byebug", :platforms => [:mri_20, :mri_21, :mri_22]
+end
+
+gemspec :path => "../"