Make Rails/Date aware of safe navigation operator

Author: hoshinotsuyoshi

lib/rubocop/cop/rails/date.rb

@@ -79,6 +79,7 @@ def on_send(node)
           add_offense(node, location: :selector,
                             message: format(MSG_SEND, method: node.method_name))
         end
+        alias on_csend on_send
 
         private
 

spec/rubocop/cop/rails/date_spec.rb

@@ -28,6 +28,13 @@
         expect(cop.offenses.size).to eq(1)
       end
 
+      context 'when using safe navigation operator', :ruby23 do
+        it "registers an offense for ##{method}" do
+          inspect_source("date&.#{method}")
+          expect(cop.offenses.size).to eq(1)
+        end
+      end
+
       it "accepts variable named #{method}" do
         expect_no_offenses("#{method} = 1")
       end