Add first system tests

test/application_system_test_case.rb

@@ -1,5 +1,7 @@
 require "test_helper"
 
 class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
-  driven_by :selenium, using: :chrome, screen_size: [ 1400, 1400 ]
+  driven_by :selenium,
+            using: :headless_firefox,
+            screen_size: [ 1400, 1400 ]
 end

test/system/sign_ups_test.rb

@@ -0,0 +1,24 @@
+require "application_system_test_case"
+
+class SignUpsTest < ApplicationSystemTestCase
+  test "can sign up" do
+    visit new_user_url
+    fill_in attr_name(User, :username), with: "awesome_user"
+    fill_in attr_name(User, :first_name), with: "Awesome"
+    fill_in attr_name(User, :last_name), with: "User"
+    fill_in attr_name(User, :email), with: "awesome_user@example.com"
+    fill_in attr_name(User, :password), with: "password"
+    fill_in attr_name(User, :password_confirmation), with: "password"
+    click_on I18n.t("users.new.sign_up")
+
+    assert_text I18n.t("users.create.success", name: "Awesome")
+  end
+
+  test "can validate email address" do
+    user = users(:unverified)
+    token = user.generate_token_for(:email_verification)
+
+    visit account_verification_url(id: token)
+    assert_text I18n.t("account_verifications.show.success")
+  end
+end

test/test_helper.rb

@@ -17,5 +17,9 @@ module ActiveSupport
       assert_includes record.errors[field.to_sym], "can't be blank"
       assert_raises { record.save(validate: false) }
     end
+
+    def attr_name(klass, attr)
+      klass.human_attribute_name(attr)
+    end
   end
 end