Much work.

test/controllers/registrations_controller_test.rb

@@ -0,0 +1,13 @@
+require "test_helper"
+
+class RegistrationsControllerTest < ActionDispatch::IntegrationTest
+  test "should get new" do
+    get registrations_new_url
+    assert_response :success
+  end
+
+  test "should get create" do
+    get registrations_create_url
+    assert_response :success
+  end
+end