avoids actually settings settings in specs by stubbing

Setting specs might influence other specs where that setting will also apply

spec/controllers/custom_fields_controller_spec.rb

@@ -30,6 +30,7 @@ require 'spec_helper'
 
 describe CustomFieldsController do
   let(:custom_field) { FactoryGirl.build(:custom_field) }
+  let(:available_languages) { ["de", "en"] }
 
   before do
     allow(@controller).to receive(:authorize)
@@ -39,7 +40,7 @@ describe CustomFieldsController do
 
   describe "POST edit" do
     before do
-      Setting.available_languages = ["de", "en"]
+      allow(Setting).to receive(:available_languages).and_return(available_languages)
       allow(CustomField).to receive(:find).and_return(custom_field)
     end
 
@@ -77,7 +78,7 @@ describe CustomFieldsController do
 
   describe "POST new" do
     before do
-      Setting.available_languages = ["de", "en"]
+      allow(Setting).to receive(:available_languages).and_return(available_languages)
     end
 
     describe "WITH empty name param" do

spec/models/mail_handler_spec.rb

@@ -280,7 +280,7 @@ describe MailHandler do
 
   it "should add a work_package by create user on public project" do
     ActionMailer::Base.deliveries.clear
-    Setting.default_language = 'en'
+    allow(Setting).to receive(:default_language).and_return('en')
     Role.non_member.update_attribute :permissions, [:add_work_packages]
     project.update_attribute :is_public, true
     expect {

spec/models/project_type_spec.rb

@@ -76,10 +76,6 @@ describe ProjectType do
   end
 
   describe '- Validations ' do
-    before do
-      ApplicationHelper.set_language_if_valid 'en'
-    end
-
     let(:attributes) {
       {:name               => 'Project Type No. 1',
        :allows_association => true}