FIX: incorrect logic in email blocker

if mail.com was blocked, email.com was automatically blocked

lib/validators/email_validator.rb

@@ -17,7 +17,7 @@ class EmailValidator < ActiveModel::EachValidator
 
   def email_in_restriction_setting?(setting, value)
     domains = setting.gsub('.', '\.')
-    regexp = Regexp.new("@(.+\.)?(#{domains})", true)
+    regexp = Regexp.new("@(.+\\.)?(#{domains})", true)
     value =~ regexp
   end
 

spec/components/validators/email_validator_spec.rb

@@ -2,21 +2,33 @@ require 'spec_helper'
 
 describe EmailValidator do
 
-  let(:record) { Fabricate.build(:user, email: "bad@spamclub.com") }
+  let(:record) {  }
   let(:validator) { described_class.new({attributes: :email}) }
   subject(:validate) { validator.validate_each(record,:email,record.email) }
 
+  def blocks?(email)
+    user = Fabricate.build(:user, email: email)
+    validator = EmailValidator.new(attributes: :email)
+    validator.validate_each(user, :email, user.email)
+    user.errors[:email].present?
+  end
+
   context "blocked email" do
     it "doesn't add an error when email doesn't match a blocked email" do
-      ScreenedEmail.stubs(:should_block?).with(record.email).returns(false)
-      validate
-      expect(record.errors[:email]).not_to be_present
+      expect(blocks?('sam@sam.com')).to eq(false)
     end
 
     it "adds an error when email matches a blocked email" do
-      ScreenedEmail.stubs(:should_block?).with(record.email).returns(true)
-      validate
-      expect(record.errors[:email]).to be_present
+      ScreenedEmail.create!(email: 'sam@sam.com', action_type: ScreenedEmail.actions[:block])
+      expect(blocks?('sam@sam.com')).to eq(true)
+    end
+
+    it "blocks based on email_domains_blacklist" do
+      SiteSetting.email_domains_blacklist = "email.com|mail.com|e-mail.com"
+      expect(blocks?('sam@email.com')).to           eq(true)
+      expect(blocks?('sam@bob.email.com')).to       eq(true)
+      expect(blocks?('sam@e-mail.com')).to          eq(true)
+      expect(blocks?('sam@googlemail.com')).to      eq(false)
     end
   end