Fix spec for old ruby

Author: Gasparila

spec/integration_spec.rb

@@ -221,7 +221,7 @@ def self.table_name_prefix
 class Namespaced::Model < ActiveRecord::Base
   include AlgoliaSearch
 
-  algoliasearch :synchronous => true  do
+  algoliasearch :synchronous => true, :index_name => safe_index_name(algolia_index_name({})) do
     attribute :customAttr do
       40 + another_private_value
     end
@@ -637,18 +637,18 @@ class SerializedObject < ActiveRecord::Base
   end
 
   it "should have an index name without :: hierarchy" do
-    Namespaced::Model.index_name.should == "Namespaced_Model"
+    (Namespaced::Model.index_name.end_with?("Namespaced_Model")).should == true
   end
 
   it "should use the block to determine attribute's value" do
-    m = Namespaced::Model.new(another_private_value: 2)
+    m = Namespaced::Model.new(:another_private_value => 2)
     attributes = Namespaced::Model.algoliasearch_settings.get_attributes(m)
     attributes['customAttr'].should == 42
     attributes['myid'].should == m.id
   end
 
   it "should always update when there is no custom _changed? function" do
-    m = Namespaced::Model.create!(another_private_value: 2)
+    m = Namespaced::Model.create!(:another_private_value => 2)
     results = Namespaced::Model.search(42)
     expect(results.size).to eq(1)
     expect(results[0].id).to eq(m.id)