Run CI locally before release

Rakefile

@@ -15,6 +15,11 @@ namespace :spec do
   task :update do
     system('cd spec && rake ugly')
   end
+
+  desc 'Check all specs'
+  task :release do
+    abort 'Spec failed!' unless system('./test.sh')
+  end
 end
 
 namespace :rails do
@@ -25,3 +30,4 @@ namespace :rails do
 end
 
 task default: [:spec, 'rails:spec']
+task release: ['spec:release']

test.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -e
+trap 'rm .ruby-version' 0
+
+VERSIONS=(
+  2.2.2
+  2.1.6
+  2.0.0
+)
+
+function test_with() {
+  version=$1
+  rbenv local $version
+  ruby -v
+  rake spec
+}
+
+for version in ${VERSIONS[@]}; do
+  test_with $version
+done
+
+rbenv local ${VERSIONS[0]}
+ruby -v
+rake rails:spec