[Fix rubocop#78] Improvements

lib/rubocop/cop/rails/enum_hash.rb

@@ -40,6 +40,16 @@ def on_send(node)
           end
         end
 
+        def autocorrect(node)
+          range = node.loc.expression
+          hash = node
+            .children
+            .each_with_index
+            .map { |elem, index| [elem.children.first, index] }.to_h
+
+          ->(corrector) { corrector.replace(range, hash.to_s) }
+        end
+
         private
 
         def enum_name(key)
@@ -50,35 +60,6 @@ def enum_name(key)
             key.source
           end
         end
-
-        def autocorrect(node)
-          enum_values = node.children[2].children.first.children[1]
-          to_replace = enum_values.loc.expression
-          values_hash = "{ #{converted_values(enum_values)} }"
-
-          ->(corrector) { corrector.replace(to_replace, values_hash) }
-        end
-
-        private
-
-        def converted_values(enum_values)
-          enum_values.children.each_with_index.map do |child, index|
-            hash_entry_as_string(child, index)
-          end.join(', ')
-        end
-
-        def hash_entry_as_string(child, index)
-          value = child.children.first
-          case value
-          when String
-            "'#{value}' => #{index}"
-          when Symbol
-            value = "'#{value}'" if value =~ /\s/
-            "#{value}: #{index}"
-          else
-            "#{child.source} => #{index}"
-          end
-        end
       end
     end
   end

spec/rubocop/cop/rails/enum_hash_spec.rb

@@ -81,13 +81,14 @@
     end
 
     it 'autocorrects' do
-      expect(
-        autocorrect_source(
-          'enum status: [:old, :"very active", "is archived", 42]'
-        )
-      ).to eq(
-        "enum status: { old: 0, 'very active': 1, 'is archived' => 2, 42 => 3 }"
-      )
+      expect_offense(<<~RUBY)
+        enum status: [:old, :"very active", "is archived", 42]
+                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Enum defined as an array found in `status` enum declaration. Use hash syntax instead.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        enum status: {:old=>0, :"very active"=>1, "is archived"=>2, 42=>3}
+      RUBY
     end
   end