rails 5: fix initializer specs

in particular, completely dump the quoting monkeypatch and specs -
we no longer know what column it's quoting for at this level, and
the float problems have long been fixed in rails proper

Change-Id: I9bbd214e6c866fcae1222f368f544f4805aac1cf
Reviewed-on: https://gerrit.instructure.com/103830
Tested-by: Jenkins
Reviewed-by: Simon Williams <simon@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>

config/initializers/postgresql_adapter.rb

@@ -177,6 +177,7 @@ module PostgreSQLAdapterExtensions
     end
   end
 
+  if CANVAS_RAILS4_2
     # Force things with (approximate) integer representations (Floats,
     # BigDecimals, Times, etc.) into those representations. Raise
     # ActiveRecord::StatementInvalid for any other non-integer things.
@@ -203,6 +204,7 @@ module PostgreSQLAdapterExtensions
         super
       end
     end
+  end
 
   def extension_installed?(extension)
     @extensions ||= {}

spec/initializers/active_record_quoting_spec.rb

@@ -1,6 +1,7 @@
 require File.expand_path('../spec_helper', File.dirname( __FILE__ ))
 
-module ActiveRecord
+if CANVAS_RAILS4_2
+  module ActiveRecord
     module ConnectionAdapters
       if defined?(PostgreSQLAdapter)
         describe PostgreSQLAdapter do
@@ -89,4 +90,5 @@ module ActiveRecord
         end
       end
     end
+  end
 end

spec/initializers/active_record_spec.rb

@@ -242,7 +242,8 @@ module ActiveRecord
     describe "union" do
       shared_examples_for "query creation" do
         it "should include conditions after the union inside of the subquery" do
-          wheres = base.active.where(id:99).union(User.where(id:1)).where_values
+          scope = base.active.where(id:99).union(User.where(id:1))
+          wheres = CANVAS_RAILS4_2 ? scope.where_values : scope.where_clause.send(:predicates)
           expect(wheres.count).to eq 1
           sql_before_union, sql_after_union = wheres.first.split("UNION ALL")
           expect(sql_before_union.include?('"id" = 99')).to be_falsey
@@ -250,7 +251,8 @@ module ActiveRecord
         end
 
         it "should include conditions prior to the union outside of the subquery" do
-          wheres = base.active.union(User.where(id:1)).where(id:99).where_values
+          scope = base.active.union(User.where(id:1)).where(id:99)
+          wheres = CANVAS_RAILS4_2 ? scope.where_values : scope.where_clause.send(:predicates)
           expect(wheres.count).to eq 2
           union_where = wheres.detect{|w| w.is_a?(String) && w.include?("UNION ALL")}
           expect(union_where.include?('"id" = 99')).to be_falsey