A bit of test refactoring

spec/observers/users_project_observer_spec.rb

@@ -1,34 +1,32 @@
 require 'spec_helper'
 
 describe UsersProjectObserver do
-  let(:user) { Factory.create :user }
-  let(:project) { Factory.create(:project, 
-                                 code: "Fuu", 
-                                 path: "Fuu" ) }
-  let(:users_project) { Factory.create(:users_project,
-                                        project: project,
-                                        user: user )}
+  let(:users_project) { stub.as_null_object }
   subject { UsersProjectObserver.instance }
 
   describe "#after_create" do
     it "should called when UsersProject created" do
       subject.should_receive(:after_create)
+
       UsersProject.observers.enable :users_project_observer do
-        Factory.create(:users_project, 
-                       project: project, 
-                       user: user)
+        create(:users_project)
       end
     end
+
     it "should send email to user" do
-      Notify.should_receive(:project_access_granted_email).with(users_project.id).and_return(double(deliver: true))
+      Event.stub(:create => true)
+      Notify.should_receive(:project_access_granted_email).and_return(stub(deliver: true))
+
       subject.after_create(users_project)
     end
+
     it "should create new event" do
       Event.should_receive(:create).with(
-        project_id: users_project.project.id, 
-        action: Event::Joined, 
+        project_id: users_project.project.id,
+        action: Event::Joined,
         author_id: users_project.user.id
       )
+
       subject.after_create(users_project)
     end
   end
@@ -36,29 +34,32 @@ describe UsersProjectObserver do
   describe "#after_update" do
     it "should called when UsersProject updated" do
       subject.should_receive(:after_update)
+
       UsersProject.observers.enable :users_project_observer do
-        users_project.update_attribute(:project_access, 40)
+        create(:users_project).update_attribute(:project_access, 40)
       end
     end
+
     it "should send email to user" do
       Notify.should_receive(:project_access_granted_email).with(users_project.id).and_return(double(deliver: true))
+
       subject.after_update(users_project)
     end
   end
+
   describe "#after_destroy" do
     it "should called when UsersProject destroyed" do
       subject.should_receive(:after_destroy)
+
       UsersProject.observers.enable :users_project_observer do
-        UsersProject.bulk_delete(
-          users_project.project,
-          [users_project.user.id]
-        )
+        create(:users_project).destroy
       end
     end
+
     it "should create new event" do
       Event.should_receive(:create).with(
-        project_id: users_project.project.id, 
-        action: Event::Left, 
+        project_id: users_project.project.id,
+        action: Event::Left,
         author_id: users_project.user.id
       )
       subject.after_destroy(users_project)