inspect attributes

spec/active_record/aux_table_spec.rb

@@ -165,6 +165,25 @@ RSpec.describe HasAuxTable do
     it "does not include the aux table foreign key" do
       expect(Car.inspect).not_to include("base_table_id")
     end
+
+    it "reports created_at, updated_at timestamp columns at the end of the list" do
+      expect(Car.inspect).to match(/\bfuel_type\b.+\bupdated_at\b/)
+      expect(Car.inspect).to match(/\bname\b.+\bupdated_at\b/)
+    end
+
+    it "includes columns in instances of the model" do
+      car = Car.create!(name: "Honda Civic")
+      expect(car.inspect).to include("fuel_type")
+      expect(car.inspect).to include("engine_size")
+      expect(car.inspect).to include("created_at")
+      expect(car.inspect).to include("updated_at")
+    end
+
+    it "puts _at columns at the end of the list on instances" do
+      car = Car.create!(name: "Honda Civic")
+      expect(car.inspect).to match(/\bfuel_type\b.+\bupdated_at\b/)
+      expect(car.inspect).to match(/\bname\b.+\bupdated_at\b/)
+    end
   end
 
   describe "database integration" do