Add env variables to test and fix some of them

app/models/user.rb

@@ -1,13 +1,13 @@
 class User < ApplicationRecord
   devise :database_authenticatable, :registerable,
-         :recoverable, :rememberable, :validatable
+         :recoverable, :rememberable, :validatable,
+         :confirmable
   
-  self.send(:devise, :confirmable) if Rails.application.email_confirmation?
-
   has_many :comments
 
   enum role: [:user, :moderator, :admin]
   after_initialize :set_default_role, if: :new_record?
+  after_initialize :skip_confirmation, if: :new_record?
 
   validates :full_name, presence: true, length: { in: 2..32 }
 
@@ -15,6 +15,13 @@ class User < ApplicationRecord
     self.role ||= :user
   end
 
+  def skip_confirmation
+    return if Rails.application.email_confirmation?
+    skip_confirmation!
+    skip_confirmation_notification!
+    skip_reconfirmation!
+  end
+
   def gravatar_url
     gravatar_id = Digest::MD5::hexdigest(email.downcase)
     "https://secure.gravatar.com/avatar/#{gravatar_id}"