Fix RSpec/LetBeforeExamples cop

Fixes the cop for the files

Adds changelog for the change

.rubocop_todo.yml

@@ -199,21 +199,6 @@ RSpec/ExpectChange:
 RSpec/ExpectInHook:
   Enabled: false
 
-# Offense count: 68
-# Cop supports --auto-correct.
-RSpec/LetBeforeExamples:
-  Exclude:
-    - 'spec/lib/banzai/filter/issue_reference_filter_spec.rb'
-    - 'spec/lib/banzai/filter/user_reference_filter_spec.rb'
-    - 'spec/lib/gitlab/email/handler/create_issue_handler_spec.rb'
-    - 'spec/lib/gitlab/email/handler/create_merge_request_handler_spec.rb'
-    - 'spec/lib/gitlab/email/handler/create_note_handler_spec.rb'
-    - 'spec/models/commit_range_spec.rb'
-    - 'spec/models/milestone_spec.rb'
-    - 'spec/models/project_services/packagist_service_spec.rb'
-    - 'spec/rubocop/cop/migration/update_column_in_batches_spec.rb'
-    - 'spec/serializers/pipeline_details_entity_spec.rb'
-
 # Offense count: 2188
 # Cop supports --auto-correct.
 # Configuration parameters: Strict, EnforcedStyle, AllowedExplicitMatchers.

changelogs/unreleased/let-before-examples-cop.yml

+---
+title: Fix RSpec/LetBeforeExamples cop
+merge_request: 41250
+author: Rajendra Kadam
+type: fixed

spec/lib/banzai/filter/issue_reference_filter_spec.rb

@@ -40,10 +40,10 @@ RSpec.describe Banzai::Filter::IssueReferenceFilter do
   end
 
   context 'internal reference' do
-    it_behaves_like 'a reference containing an element node'
-
     let(:reference) { "##{issue.iid}" }
 
+    it_behaves_like 'a reference containing an element node'
+
     it 'links to a valid reference' do
       doc = reference_filter("Fixed #{reference}")
 
@@ -134,11 +134,11 @@ RSpec.describe Banzai::Filter::IssueReferenceFilter do
   end
 
   context 'cross-project / cross-namespace complete reference' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:project2)  { create(:project, :public) }
-    let(:issue)     { create(:issue, project: project2) }
     let(:reference) { "#{project2.full_path}##{issue.iid}" }
+    let(:issue)     { create(:issue, project: project2) }
+    let(:project2)  { create(:project, :public) }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'ignores valid references when cross-reference project uses external tracker' do
       expect_any_instance_of(described_class).to receive(:find_object)
@@ -182,13 +182,13 @@ RSpec.describe Banzai::Filter::IssueReferenceFilter do
   end
 
   context 'cross-project / same-namespace complete reference' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:namespace) { create(:namespace) }
-    let(:project)   { create(:project, :public, namespace: namespace) }
-    let(:project2)  { create(:project, :public, namespace: namespace) }
-    let(:issue)     { create(:issue, project: project2) }
     let(:reference) { "#{project2.full_path}##{issue.iid}" }
+    let(:issue)     { create(:issue, project: project2) }
+    let(:project2)  { create(:project, :public, namespace: namespace) }
+    let(:project)   { create(:project, :public, namespace: namespace) }
+    let(:namespace) { create(:namespace) }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'ignores valid references when cross-reference project uses external tracker' do
       expect_any_instance_of(described_class).to receive(:find_object)
@@ -232,13 +232,13 @@ RSpec.describe Banzai::Filter::IssueReferenceFilter do
   end
 
   context 'cross-project shorthand reference' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:namespace) { create(:namespace) }
-    let(:project)   { create(:project, :public, namespace: namespace) }
-    let(:project2)  { create(:project, :public, namespace: namespace) }
-    let(:issue)     { create(:issue, project: project2) }
     let(:reference) { "#{project2.path}##{issue.iid}" }
+    let(:issue)     { create(:issue, project: project2) }
+    let(:project2)  { create(:project, :public, namespace: namespace) }
+    let(:project)   { create(:project, :public, namespace: namespace) }
+    let(:namespace) { create(:namespace) }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'ignores valid references when cross-reference project uses external tracker' do
       expect_any_instance_of(described_class).to receive(:find_object)
@@ -282,12 +282,12 @@ RSpec.describe Banzai::Filter::IssueReferenceFilter do
   end
 
   context 'cross-project URL reference' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:namespace) { create(:namespace, name: 'cross-reference') }
-    let(:project2)  { create(:project, :public, namespace: namespace) }
-    let(:issue)     { create(:issue, project: project2) }
     let(:reference) { issue_url + "#note_123" }
+    let(:issue)     { create(:issue, project: project2) }
+    let(:project2)  { create(:project, :public, namespace: namespace) }
+    let(:namespace) { create(:namespace, name: 'cross-reference') }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'links to a valid reference' do
       doc = reference_filter("See #{reference}")
@@ -310,13 +310,13 @@ RSpec.describe Banzai::Filter::IssueReferenceFilter do
   end
 
   context 'cross-project reference in link href' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:namespace) { create(:namespace, name: 'cross-reference') }
-    let(:project2)  { create(:project, :public, namespace: namespace) }
-    let(:issue)     { create(:issue, project: project2) }
-    let(:reference) { issue.to_reference(project) }
     let(:reference_link) { %{<a href="#{reference}">Reference</a>} }
+    let(:reference) { issue.to_reference(project) }
+    let(:issue)     { create(:issue, project: project2) }
+    let(:project2)  { create(:project, :public, namespace: namespace) }
+    let(:namespace) { create(:namespace, name: 'cross-reference') }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'links to a valid reference' do
       doc = reference_filter("See #{reference_link}")
@@ -339,13 +339,13 @@ RSpec.describe Banzai::Filter::IssueReferenceFilter do
   end
 
   context 'cross-project URL in link href' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:namespace) { create(:namespace, name: 'cross-reference') }
-    let(:project2)  { create(:project, :public, namespace: namespace) }
-    let(:issue)     { create(:issue, project: project2) }
-    let(:reference) { "#{issue_url + "#note_123"}" }
     let(:reference_link) { %{<a href="#{reference}">Reference</a>} }
+    let(:reference) { "#{issue_url + "#note_123"}" }
+    let(:issue)     { create(:issue, project: project2) }
+    let(:project2)  { create(:project, :public, namespace: namespace) }
+    let(:namespace) { create(:namespace, name: 'cross-reference') }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'links to a valid reference' do
       doc = reference_filter("See #{reference_link}")

spec/lib/banzai/filter/user_reference_filter_spec.rb

@@ -40,10 +40,10 @@ RSpec.describe Banzai::Filter::UserReferenceFilter do
   end
 
   context 'mentioning @all' do
-    it_behaves_like 'a reference containing an element node'
-
     let(:reference) { User.reference_prefix + 'all' }
 
+    it_behaves_like 'a reference containing an element node'
+
     before do
       project.add_developer(project.creator)
     end
@@ -78,10 +78,10 @@ RSpec.describe Banzai::Filter::UserReferenceFilter do
   end
 
   context 'mentioning a group' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:group)     { create(:group) }
     let(:reference) { group.to_reference }
+    let(:group)     { create(:group) }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'links to the Group' do
       doc = reference_filter("Hey #{reference}")
@@ -98,10 +98,10 @@ RSpec.describe Banzai::Filter::UserReferenceFilter do
   end
 
   context 'mentioning a nested group' do
-    it_behaves_like 'a reference containing an element node'
-
-    let(:group)     { create(:group, :nested) }
     let(:reference) { group.to_reference }
+    let(:group)     { create(:group, :nested) }
+
+    it_behaves_like 'a reference containing an element node'
 
     it 'links to the nested group' do
       doc = reference_filter("Hey #{reference}")

spec/lib/gitlab/email/handler/create_issue_handler_spec.rb

@@ -4,17 +4,6 @@ require 'spec_helper'
 
 RSpec.describe Gitlab::Email::Handler::CreateIssueHandler do
   include_context :email_shared_context
-  it_behaves_like :reply_processing_shared_examples
-
-  before do
-    stub_incoming_email_setting(enabled: true, address: "incoming+%{key}@appmail.adventuretime.ooo")
-    stub_config_setting(host: 'localhost')
-  end
-
-  let(:email_raw) { email_fixture('emails/valid_new_issue.eml') }
-  let(:namespace) { create(:namespace, path: 'gitlabhq') }
-
-  let!(:project)  { create(:project, :public, namespace: namespace, path: 'gitlabhq') }
   let!(:user) do
     create(
       :user,
@@ -23,6 +12,17 @@ RSpec.describe Gitlab::Email::Handler::CreateIssueHandler do
     )
   end
 
+  let!(:project)  { create(:project, :public, namespace: namespace, path: 'gitlabhq') }
+  let(:namespace) { create(:namespace, path: 'gitlabhq') }
+  let(:email_raw) { email_fixture('emails/valid_new_issue.eml') }
+
+  it_behaves_like :reply_processing_shared_examples
+
+  before do
+    stub_incoming_email_setting(enabled: true, address: "incoming+%{key}@appmail.adventuretime.ooo")
+    stub_config_setting(host: 'localhost')
+  end
+
   context "when email key" do
     let(:mail) { Mail::Message.new(email_raw) }
 

spec/lib/gitlab/email/handler/create_merge_request_handler_spec.rb

@@ -4,6 +4,18 @@ require 'spec_helper'
 
 RSpec.describe Gitlab::Email::Handler::CreateMergeRequestHandler do
   include_context :email_shared_context
+  let!(:user) do
+    create(
+      :user,
+      email: 'jake@adventuretime.ooo',
+      incoming_email_token: 'auth_token'
+    )
+  end
+
+  let!(:project)  { create(:project, :public, :repository, namespace: namespace, path: 'gitlabhq') }
+  let(:namespace) { create(:namespace, path: 'gitlabhq') }
+  let(:email_raw) { email_fixture('emails/valid_new_merge_request.eml') }
+
   it_behaves_like :reply_processing_shared_examples
 
   before do
@@ -15,18 +27,6 @@ RSpec.describe Gitlab::Email::Handler::CreateMergeRequestHandler do
     TestEnv.clean_test_path
   end
 
-  let(:email_raw) { email_fixture('emails/valid_new_merge_request.eml') }
-  let(:namespace) { create(:namespace, path: 'gitlabhq') }
-
-  let!(:project)  { create(:project, :public, :repository, namespace: namespace, path: 'gitlabhq') }
-  let!(:user) do
-    create(
-      :user,
-      email: 'jake@adventuretime.ooo',
-      incoming_email_token: 'auth_token'
-    )
-  end
-
   context "when email key" do
     let(:mail) { Mail::Message.new(email_raw) }
 

spec/lib/gitlab/email/handler/create_note_handler_spec.rb

@@ -4,6 +4,16 @@ require 'spec_helper'
 
 RSpec.describe Gitlab::Email::Handler::CreateNoteHandler do
   include_context :email_shared_context
+  let!(:sent_notification) do
+    SentNotification.record_note(note, user.id, mail_key)
+  end
+
+  let(:noteable)  { note.noteable }
+  let(:note)      { create(:diff_note_on_merge_request, project: project) }
+  let(:user)      { create(:user) }
+  let(:project)   { create(:project, :public, :repository) }
+  let(:email_raw) { fixture_file('emails/valid_reply.eml') }
+
   it_behaves_like :reply_processing_shared_examples
 
   before do
@@ -11,16 +21,6 @@ RSpec.describe Gitlab::Email::Handler::CreateNoteHandler do
     stub_config_setting(host: 'localhost')
   end
 
-  let(:email_raw) { fixture_file('emails/valid_reply.eml') }
-  let(:project)   { create(:project, :public, :repository) }
-  let(:user)      { create(:user) }
-  let(:note)      { create(:diff_note_on_merge_request, project: project) }
-  let(:noteable)  { note.noteable }
-
-  let!(:sent_notification) do
-    SentNotification.record_note(note, user.id, mail_key)
-  end
-
   context "when the recipient address doesn't include a mail key" do
     let(:email_raw) { fixture_file('emails/valid_reply.eml').gsub(mail_key, "") }
 

spec/models/commit_range_spec.rb

@@ -3,25 +3,22 @@
 require 'spec_helper'
 
 RSpec.describe CommitRange do
+  let(:range2) { described_class.new("#{sha_from}..#{sha_to}", project) }
+  let(:range)  { described_class.new("#{sha_from}...#{sha_to}", project) }
+  let(:full_sha_to)   { commit2.id }
+  let(:full_sha_from) { commit1.id }
+  let(:sha_to)   { commit2.short_id }
+  let(:sha_from) { commit1.short_id }
+  let!(:commit2) { project.commit }
+  let!(:commit1) { project.commit("HEAD~2") }
+  let!(:project) { create(:project, :public, :repository) }
+
   describe 'modules' do
     subject { described_class }
 
     it { is_expected.to include_module(Referable) }
   end
 
-  let!(:project) { create(:project, :public, :repository) }
-  let!(:commit1) { project.commit("HEAD~2") }
-  let!(:commit2) { project.commit }
-
-  let(:sha_from) { commit1.short_id }
-  let(:sha_to)   { commit2.short_id }
-
-  let(:full_sha_from) { commit1.id }
-  let(:full_sha_to)   { commit2.id }
-
-  let(:range)  { described_class.new("#{sha_from}...#{sha_to}", project) }
-  let(:range2) { described_class.new("#{sha_from}..#{sha_to}", project) }
-
   it 'raises ArgumentError when given an invalid range string' do
     expect { described_class.new("Foo", project) }.to raise_error(ArgumentError)
   end

spec/models/milestone_spec.rb

@@ -3,6 +3,11 @@
 require 'spec_helper'
 
 RSpec.describe Milestone do
+  let(:user) { create(:user) }
+  let(:issue) { create(:issue, project: project) }
+  let(:milestone) { create(:milestone, project: project) }
+  let(:project) { create(:project, :public) }
+
   it_behaves_like 'a timebox', :milestone
 
   describe 'MilestoneStruct#serializable_hash' do
@@ -47,11 +52,6 @@ RSpec.describe Milestone do
     it { is_expected.to have_many(:milestone_releases) }
   end
 
-  let(:project) { create(:project, :public) }
-  let(:milestone) { create(:milestone, project: project) }
-  let(:issue) { create(:issue, project: project) }
-  let(:user) { create(:user) }
-
   describe '.predefined_id?' do
     it 'returns true for a predefined Milestone ID' do
       expect(Milestone.predefined_id?(described_class::Upcoming.id)).to be true

spec/models/project_services/packagist_service_spec.rb

@@ -3,20 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe PackagistService do
-  describe "Associations" do
-    it { is_expected.to belong_to :project }
-    it { is_expected.to have_one :service_hook }
-  end
-
-  let(:project) { create(:project) }
-
-  let(:packagist_server) { 'https://packagist.example.com' }
-  let(:packagist_username) { 'theUser' }
-  let(:packagist_token) { 'verySecret' }
-  let(:packagist_hook_url) do
-    "#{packagist_server}/api/update-package?username=#{packagist_username}&apiToken=#{packagist_token}"
-  end
-
   let(:packagist_params) do
     {
         active: true,
@@ -29,6 +15,20 @@ RSpec.describe PackagistService do
     }
   end
 
+  let(:packagist_hook_url) do
+    "#{packagist_server}/api/update-package?username=#{packagist_username}&apiToken=#{packagist_token}"
+  end
+
+  let(:packagist_token) { 'verySecret' }
+  let(:packagist_username) { 'theUser' }
+  let(:packagist_server) { 'https://packagist.example.com' }
+  let(:project) { create(:project) }
+
+  describe "Associations" do
+    it { is_expected.to belong_to :project }
+    it { is_expected.to have_one :service_hook }
+  end
+
   describe '#execute' do
     let(:user)    { create(:user) }
     let(:project) { create(:project, :repository) }

spec/rubocop/cop/migration/update_column_in_batches_spec.rb

@@ -27,6 +27,8 @@ RSpec.describe RuboCop::Cop::Migration::UpdateColumnInBatches do
     FileUtils.rm_rf(tmp_rails_root)
   end
 
+  let(:spec_filepath) { tmp_rails_root.join('spec', 'migrations', 'my_super_migration_spec.rb') }
+
   context 'outside of a migration' do
     it 'does not register any offenses' do
       inspect_source(migration_code)
@@ -35,8 +37,6 @@ RSpec.describe RuboCop::Cop::Migration::UpdateColumnInBatches do
     end
   end
 
-  let(:spec_filepath) { tmp_rails_root.join('spec', 'migrations', 'my_super_migration_spec.rb') }
-
   shared_context 'with a migration file' do
     before do
       FileUtils.mkdir_p(File.dirname(migration_filepath))

spec/serializers/pipeline_details_entity_spec.rb

@@ -6,6 +6,10 @@ RSpec.describe PipelineDetailsEntity do
   let_it_be(:user) { create(:user) }
   let(:request) { double('request') }
 
+  let(:entity) do
+    described_class.represent(pipeline, request: request)
+  end
+
   it 'inherrits from PipelineEntity' do
     expect(described_class).to be < PipelineEntity
   end
@@ -16,10 +20,6 @@ RSpec.describe PipelineDetailsEntity do
     allow(request).to receive(:current_user).and_return(user)
   end
 
-  let(:entity) do
-    described_class.represent(pipeline, request: request)
-  end
-
   describe '#as_json' do
     subject { entity.as_json }