Replace set with let_it_be in spec/serializers

Removes usage of `set` in specs

spec/serializers/build_details_entity_spec.rb

@@ -5,7 +5,7 @@ require 'spec_helper'
 describe BuildDetailsEntity do
   include ProjectForksHelper
 
-  set(:user) { create(:admin) }
+  let_it_be(:user) { create(:admin) }
 
   it 'inherits from JobEntity' do
     expect(described_class).to be < JobEntity

spec/serializers/container_repository_entity_spec.rb

@@ -3,14 +3,10 @@
 require 'spec_helper'
 
 describe ContainerRepositoryEntity do
-  let(:entity) do
-    described_class.new(repository, request: request)
-  end
-
-  set(:project) { create(:project) }
-  set(:user) { create(:user) }
-  set(:repository) { create(:container_repository, project: project) }
-
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:repository) { create(:container_repository, project: project) }
+  let(:entity) { described_class.new(repository, request: request) }
   let(:request) { double('request') }
 
   subject { entity.as_json }

spec/serializers/container_tag_entity_spec.rb

@@ -3,14 +3,10 @@
 require 'spec_helper'
 
 describe ContainerTagEntity do
-  let(:entity) do
-    described_class.new(tag, request: request)
-  end
-
-  set(:project) { create(:project) }
-  set(:user) { create(:user) }
-  set(:repository) { create(:container_repository, name: 'image', project: project) }
-
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:repository) { create(:container_repository, name: 'image', project: project) }
+  let(:entity) { described_class.new(tag, request: request) }
   let(:request) { double('request') }
   let(:tag) { repository.tag('test') }
 

spec/serializers/deployment_serializer_spec.rb

@@ -3,9 +3,8 @@
 require 'spec_helper'
 
 describe DeploymentSerializer do
-  set(:project) { create(:project, :repository) }
-  set(:user) { create(:user, email: project.commit.author_email) }
-
+  let_it_be(:project) { create(:project, :repository) }
+  let_it_be(:user) { create(:user, email: project.commit.author_email) }
   let(:resource) { create(:deployment, project: project, sha: project.commit.id) }
   let(:serializer) { described_class.new(request) }
 

spec/serializers/merge_request_serializer_spec.rb

@@ -3,8 +3,8 @@
 require 'spec_helper'
 
 describe MergeRequestSerializer do
-  set(:user) { create(:user) }
-  set(:resource) { create(:merge_request, description: "Description") }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:resource) { create(:merge_request, description: "Description") }
 
   let(:json_entity) do
     described_class.new(current_user: user)

spec/serializers/namespace_basic_entity_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 describe NamespaceBasicEntity do
-  set(:group) { create(:group) }
+  let_it_be(:group) { create(:group) }
   let(:entity) do
     described_class.represent(group)
   end

spec/serializers/pipeline_details_entity_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 describe PipelineDetailsEntity do
-  set(:user) { create(:user) }
+  let_it_be(:user) { create(:user) }
   let(:request) { double('request') }
 
   it 'inherrits from PipelineEntity' do

spec/serializers/pipeline_entity_spec.rb

@@ -5,9 +5,9 @@ require 'spec_helper'
 describe PipelineEntity do
   include Gitlab::Routing
 
-  set(:project) { create(:project) }
-  set(:user) { create(:user) }
-  set(:project) { create(:project) }
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:project) { create(:project) }
   let(:request) { double('request') }
 
   before do

spec/serializers/pipeline_serializer_spec.rb

@@ -3,8 +3,8 @@
 require 'spec_helper'
 
 describe PipelineSerializer do
-  set(:project) { create(:project, :repository) }
-  set(:user) { create(:user) }
+  let_it_be(:project) { create(:project, :repository) }
+  let_it_be(:user) { create(:user) }
 
   let(:serializer) do
     described_class.new(current_user: user, project: project)

spec/serializers/project_import_entity_spec.rb

@@ -5,7 +5,7 @@ require 'spec_helper'
 describe ProjectImportEntity do
   include ImportHelper
 
-  set(:project) { create(:project, import_status: :started, import_source: 'namespace/project') }
+  let_it_be(:project) { create(:project, import_status: :started, import_source: 'namespace/project') }
   let(:provider_url) { 'https://provider.com' }
   let(:entity) { described_class.represent(project, provider_url: provider_url) }
 

spec/serializers/project_serializer_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 describe ProjectSerializer do
-  set(:project) { create(:project) }
+  let_it_be(:project) { create(:project) }
   let(:provider_url) { 'http://provider.com' }
 
   context 'when serializer option is :import' do