added minitest tests, added 2 entities in order to handle compability between rails versions

Rakefile

@@ -27,7 +27,8 @@ end
 # Rake libs default is lib
 # libs << path to load test_helper, etc..
 Rake::TestTask.new do |t|
-  t.libs << 'tests/spec'
-  t.pattern  = FileList['tests/spec/*_spec.rb']
+  t.libs << "tests/spec"
+  t.pattern     = "tests/spec/**/*_spec.rb"
+  t.test_files =  FileList["tests/spec/**/*_spec.rb"]
   t.verbose     = true
 end

impressionist.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
   # Capybara has dropped support for Ruby 1.8.7 onwards version 2.0.3
   s.add_development_dependency 'capybara', '>= 2.0.3'
   s.add_development_dependency 'rake', '>= 0.9'
-  s.add_development_dependency 'rails', '3.1.12'
+  s.add_development_dependency 'rails', '3.2.12'
   s.add_development_dependency 'rdoc', '>= 2.4.2'
   s.add_development_dependency 'rspec-rails'
   s.add_development_dependency 'simplecov'

lib/impressionist/load.rb

@@ -1,10 +1,9 @@
-require "impressionist/engine"
+require 'impressionist/engine'
 
-require "impressionist/set_up_association"
+require 'impressionist/setup_association'
 
-require "impressionist/counter_cache"
+require 'impressionist/counter_cache'
 
-require "impressionist/update_counters"
-
-require "impressionist/rails_toggle"
+require 'impressionist/update_counters'
 
+require 'impressionist/rails_toggle'

lib/impressionist/models/active_record/impression.rb

@@ -1,12 +1,15 @@
 # Responsability
+## See CounterCache TODO: extract it into a class
 # * be able to update_counters
 # * log an error if imps_id and imps_type can not be found
-# asks updatable? whether it may or may not be updated
+# * asks updatable? whether it may or may not be updated
 # FIX exeception raising when no imps_id is found
 
 class Impression < ActiveRecord::Base
+
   include Impressionist::CounterCache
-  include Impressionist::SetUpAssociation
+  # sets belongs_to and attr_accessible
+  Impressionist::SetupAssociation.new(self).set
 
   after_save :impressionable_counter_cache_updatable?
 

lib/impressionist/rails_toggle.rb

@@ -2,25 +2,21 @@ module Impressionist
   # Responsability
   # Toggles between rails > 3.1 < 4
   # In order to make attr_accessible available in a rails app < 4
+
   class RailsToggle
-
-    attr_reader :r_version
-
-    def initialize(version)
-      @r_version = version.to_s 
-    end
-
-    # if Rails 4, it does not include attr_accessible
-    # and it returns false
-    def valid?
-      greater_than_4? ? false : true
+    # decides where or not to include attr_accessible
+    def should_include?
+      ask_rails || false
     end
 
     private
 
-      def greater_than_4?
-        r_version == "4" ? true : false
+      # returns false if rails >= 4
+      # true if rails < 4
+      def ask_rails
+        ::Rails::VERSION::MAJOR.to_i >= 4 ? false : true
       end
 
   end
+
 end

lib/impressionist/set_up_association.rb

@@ -1,28 +0,0 @@
-module Impressionist
-  module SetUpAssociation
-
-    def self.included(base)
-      # include attr_accessible base on
-      # rails version
-      @klass = base
-      should_include?
-      base.belongs_to(:impressionable,:polymorphic => true)
-    end
-
-private
-
-    def self.should_include?
-      toggle = Impressionist::RailsToggle.new(Rails::VERSION::MAJOR)
-      self.include_attr_accessible unless toggle.valid?
-    end
-
-    def self.include_attr_accessible
-      @klass.attr_accessible(:impressionable_type,:impressionable_id,
-      :user_id,:controller_name,:action_name,:view_name,:request_hash,
-      :ip_address,:session_hash,:message,:referrer)
-
-    end
-
-  end
-
-end

lib/impressionist/setup_association.rb

@@ -0,0 +1,48 @@
+module Impressionist
+  # Impressionist::SetupAssociation.new(entity).set
+  class SetupAssociation
+    def initialize(receiver)
+      @receiver = receiver
+    end
+
+    # True or False
+    # Note toggle returns false if rails >= 4
+    def include_attr_acc?
+      toggle && make_accessible
+    end
+
+    def define_belongs_to
+      receiver.belongs_to(:impressionable, :polymorphic => true)
+    end
+
+    # returns done if thruthy
+    def set
+      :done if (include_attr_acc? && define_belongs_to)
+    end
+
+    private
+      attr_reader :receiver, :toggle
+
+      def make_accessible
+       receiver.
+        attr_accessible(:impressionable_type,
+                        :impressionable_id,
+                        :controller_name,
+                        :request_hash,
+                        :session_hash,
+                        :action_name,
+                        :ip_address,
+                        :view_name,
+                        :referrer,
+                        :message,
+                        :user_id)
+      end
+
+      def toggle
+        t = RailsToggle.new
+        t.should_include?
+      end
+  end
+end
+
+

tests/spec/rails_toggle_spec.rb

@@ -1,38 +1,26 @@
 # Responsability
   # Test whether rails version > 4
   # includes attr_accessible if < 4
-require 'test_helper.rb'
+require 'minitest_helper'
 require 'impressionist/rails_toggle'
 
 module Impressionist
   describe RailsToggle do
 
+    before {
+      @toggle = RailsToggle.new
+    }
+
     describe "Rails 4" do
-      before do
-        @toggle = RailsToggle.new("4")
+
+      # see your_minitest_path/lib/minitest/mock.rb
+      it "must not include attr_accessible" do
+        @toggle.stub :ask_rails, false do
+          refute @toggle.should_include?
+        end
       end
 
-      it "return current rails version" do
-        @toggle.r_version.must_equal "4"
-      end
-
-      it "must not load attr_accessible" do
-        @toggle.valid?.must_equal false
-      end
-
-    end
-
-    describe "Rails 3.1.x" do
-
-      before do
-        @toggle = RailsToggle.new("3")
-      end
-
-      it "includes" do
-         @toggle.valid?.must_equal true
-      end
     end
 
   end
-
 end

tests/spec/setup_association_spec.rb

@@ -0,0 +1,55 @@
+require 'minitest_helper'
+require 'impressionist/setup_association'
+
+module Impressionist
+  describe SetupAssociation do
+
+    let(:mock)  { Minitest::Mock.new }
+    let(:set_up) { SetupAssociation.new(mock) }
+
+    before do
+      # expects attr_accessible to return true
+      # and pass 11 arguments
+      mock.
+        expect(:attr_accessible, true) do |args|
+          args.size == 11
+        end
+
+    end
+
+    describe "attr_accessible" do
+
+      it "includes" do
+        set_up.stub :toggle, true do
+          set_up.include_attr_acc?.must_equal true
+
+          mock.verify
+        end
+      end
+
+    end
+
+    describe "belongs_to" do
+
+      it "active_record" do
+        mock.expect(:belongs_to, true, [Symbol, Hash])
+        set_up.define_belongs_to.must_equal true
+      end
+
+    end
+
+    describe "#set" do
+
+      it "sets an association" do
+        def set_up.include_attr_acc?; true; end
+
+        set_up.stub(:define_belongs_to, true) {
+          set_up.set.must_equal :done
+        }
+
+      end
+
+    end
+
+  end
+end