add support for Rails 5.2

Appraisals

@@ -25,3 +25,10 @@ appraise "rails-5-1" do
   gem "pg", "~> 0.18.0"
   gem "activerecord-import", "= 0.13.0"
 end
+
+appraise "rails-5-2" do
+  ruby ">= 2.2.2"
+  gem "activerecord", "~> 5.2.0"
+  gem "pg", "~> 0.18.0"
+  gem "activerecord-import", "= 0.13.0"
+end

gemfiles/rails_5_2.gemfile

@@ -0,0 +1,11 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+ruby ">= 2.2.2"
+
+gem "activerecord", "~> 5.2.0"
+gem "pg", "~> 0.18.0"
+gem "activerecord-import", "= 0.13.0"
+
+gemspec path: "../"

gemfiles/rails_5_2.gemfile.lock

@@ -0,0 +1,88 @@
+PATH
+  remote: ..
+  specs:
+    vorpal (1.0.0)
+      activesupport
+      equalizer
+      simple_serializer (~> 1.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    activemodel (5.2.1)
+      activesupport (= 5.2.1)
+    activerecord (5.2.1)
+      activemodel (= 5.2.1)
+      activesupport (= 5.2.1)
+      arel (>= 9.0)
+    activerecord-import (0.13.0)
+      activerecord (>= 3.0)
+    activesupport (5.2.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    appraisal (2.2.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    arel (9.0.0)
+    axiom-types (0.1.1)
+      descendants_tracker (~> 0.0.4)
+      ice_nine (~> 0.11.0)
+      thread_safe (~> 0.3, >= 0.3.1)
+    coercible (1.0.0)
+      descendants_tracker (~> 0.0.1)
+    concurrent-ruby (1.0.5)
+    descendants_tracker (0.0.4)
+      thread_safe (~> 0.3, >= 0.3.1)
+    diff-lcs (1.3)
+    equalizer (0.0.11)
+    i18n (1.1.0)
+      concurrent-ruby (~> 1.0)
+    ice_nine (0.11.2)
+    minitest (5.11.3)
+    pg (0.18.4)
+    rake (10.5.0)
+    rspec (3.8.0)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
+    rspec-core (3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-expectations (3.8.1)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.8.0)
+    rspec-mocks (3.8.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.8.0)
+    rspec-support (3.8.0)
+    simple_serializer (1.0.2)
+    thor (0.20.0)
+    thread_safe (0.3.6)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+    virtus (1.0.5)
+      axiom-types (~> 0.1)
+      coercible (~> 1.0)
+      descendants_tracker (~> 0.0, >= 0.0.3)
+      equalizer (~> 0.0, >= 0.0.9)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  activerecord (~> 5.2.0)
+  activerecord-import (= 0.13.0)
+  appraisal (~> 2.2)
+  pg (~> 0.18.0)
+  rake (~> 10.0)
+  rspec (~> 3.0)
+  virtus (~> 1.0)
+  vorpal!
+
+RUBY VERSION
+   ruby 2.3.3p222
+
+BUNDLED WITH
+   1.16.2

spec/helpers/db_helpers.rb

@@ -56,7 +56,8 @@ def table_name_is_free?(table_name)
       !db_connection.table_exists?(table_name)
     elsif (ActiveRecord::VERSION::MAJOR == 4 && ActiveRecord::VERSION::MINOR == 2) ||
       (ActiveRecord::VERSION::MAJOR == 5 && ActiveRecord::VERSION::MINOR == 0) ||
-      (ActiveRecord::VERSION::MAJOR == 5 && ActiveRecord::VERSION::MINOR == 1)
+      (ActiveRecord::VERSION::MAJOR == 5 && ActiveRecord::VERSION::MINOR == 1) ||
+      (ActiveRecord::VERSION::MAJOR == 5 && ActiveRecord::VERSION::MINOR == 2)
       !db_connection.data_source_exists?(table_name)
     else
       raise "ActiveRecord Version #{ActiveRecord::VERSION::STRING} is not supported!"

spec/vorpal/performance/performance_spec.rb

@@ -124,6 +124,12 @@ def add_branch(branch_options)
   # update    3.030000   0.290000   3.320000 (  3.839557)
   # load      1.340000   0.010000   1.350000 (  1.509182)
   # destroy   0.950000   0.010000   0.960000 (  1.155866)
+  #
+  # Vorpal 1.0.0, Ruby 2.3.3, ActiveRecord 5.1.6, AR:Import 0.13.0
+  # create    0.920000   0.120000   1.040000 (  1.534410)
+  # update    3.010000   0.290000   3.300000 (  3.850101)
+  # load      1.380000   0.010000   1.390000 (  1.561047)
+  # destroy   1.050000   0.010000   1.060000 (  1.260379)
   it 'benchmarks all operations' do
     trees = build_trees(1000)
     Benchmark.bm(7) do |x|