Use Date and Time classes in specs

Instead of the flawed DateTime class. Rubcop complained and was right so.

spec/factories.rb

@@ -3,10 +3,10 @@
     name 'My Event'
     hidden_name 'not shown'
     location
-    starts_at DateTime.new(2012, 03, 02, 8, 15)
-    ends_at DateTime.new(2012, 03, 02, 19, 30)
-    lunch_starts_at DateTime.new(2012, 03, 02, 12, 15)
-    lunch_ends_at DateTime.new(2012, 03, 02, 13, 45)
+    starts_at Time.local(2012, 03, 02, 8, 15)
+    ends_at Time.local(2012, 03, 02, 19, 30)
+    lunch_starts_at Time.local(2012, 03, 02, 12, 15)
+    lunch_ends_at Time.local(2012, 03, 02, 13, 45)
     description "something\nfancy"
     published false
     entrance_fee 12.3

spec/features/admin/resources_integration_spec.rb

@@ -62,7 +62,7 @@ def reload_event_class
       before do
         visit '/admin/events/new'
         fill_in 'event_name', with: 'My second event'
-        fill_in 'event_starts_at', with: DateTime.new(2012, 03, 03, 20, 00)
+        fill_in 'event_starts_at', with: Time.local(2012, 03, 03, 20, 00)
         select location.name, from: 'Location'
         click_on 'Save'
       end
@@ -180,16 +180,16 @@ def self.alchemy_resource_filters
           %w(starting_today future)
         end
 
-        scope :starting_today, -> { where(starts_at: DateTime.current.at_midnight..DateTime.tomorrow.at_midnight) }
-        scope :future, -> { where("starts_at > ?", DateTime.tomorrow.at_midnight) }
+        scope :starting_today, -> { where(starts_at: Time.current.at_midnight..Date.tomorrow.at_midnight) }
+        scope :future, -> { where("starts_at > ?", Date.tomorrow.at_midnight) }
       end
       example.run
       reload_event_class
     end
 
-    let!(:past_event) { create(:event, name: "Horse Expo", starts_at: DateTime.current - 100.years) }
-    let!(:today_event) { create(:event, name: "Car Expo", starts_at: DateTime.current.at_noon) }
-    let!(:future_event) { create(:event, name: "Hovercar Expo", starts_at: DateTime.current + 30.years) }
+    let!(:past_event) { create(:event, name: "Horse Expo", starts_at: Time.current - 100.years) }
+    let!(:today_event) { create(:event, name: "Car Expo", starts_at: Time.current.at_noon) }
+    let!(:future_event) { create(:event, name: "Hovercar Expo", starts_at: Time.current + 30.years) }
 
     it "lets the user filter by the defined scopes", aggregate_failures: true do
       visit "/admin/events"

spec/models/alchemy/essence_date_spec.rb

@@ -6,7 +6,7 @@ module Alchemy
 
     it_behaves_like "an essence" do
       let(:essence)          { EssenceDate.new }
-      let(:ingredient_value) { DateTime.current.iso8601 }
+      let(:ingredient_value) { Time.current.iso8601 }
     end
 
     describe '#preview_text' do
@@ -18,7 +18,7 @@ module Alchemy
 
       context "if date set" do
         it "should format the date by i18n" do
-          essence.date = DateTime.current
+          essence.date = Time.current
           expect(::I18n).to receive(:l).with(essence.date, format: :date)
           essence.preview_text
         end