drop support for activerecord 3.1

Author: seuros

.travis.yml

@@ -8,7 +8,6 @@ gemfile:
   - ci/Gemfile.activerecord-4.1.x
   - ci/Gemfile.activerecord-4.0.x
   - ci/Gemfile.activerecord-3.2.x
-  - ci/Gemfile.activerecord-3.1.x
 
 env:
   - DB=sqlite

closure_tree.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |gem|
   gem.files = Dir["lib/**/*"] + ["MIT-LICENSE", "Rakefile", "README.md"]
   gem.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
 
-  gem.add_runtime_dependency 'activerecord', '>= 3.1.0'
+  gem.add_runtime_dependency 'activerecord', '>= 3.2.0'
   gem.add_runtime_dependency 'with_advisory_lock', '>= 0.0.9' # <- to prevent duplicate roots
 
   gem.add_development_dependency 'rake'

spec/spec_helper.rb

@@ -9,6 +9,7 @@
 require 'foreigner'
 require 'database_cleaner'
 require 'closure_tree'
+require 'tmpdir'
 
 if ENV['STDOUT_LOGGING']
   log = Logger.new(STDOUT)

tests.sh

@@ -5,8 +5,7 @@ for RBENV_VERSION in 2.1.2 2.0.0-p481 1.9.3-p545
 do
   gem install bundler rake # < just to make sure
   rbenv rehash || true
-  for BUNDLE_GEMFILE in ci/Gemfile.activerecord-4.1.x ci/Gemfile.activerecord-4.0.x ci/Gemfile.activerecord-3.2.x ci/Gemfile.activerecord-3.1.x
-  do
+  for BUNDLE_GEMFILE in ci/Gemfile.activerecord-4.1.x ci/Gemfile.activerecord-4.0.x ci/Gemfile.activerecord-3.2.x
     bundle update --quiet
     for DB in mysql postgresql sqlite
     do