Enable the Rubocop DeprecatedClassMethods cop

This reports uses of `File.exists?` and `Dir.exists?`, which were both
deprecated in Ruby and will eventually be removed in favor of
`.exist?`. Also fixes all existing uses of the deprecated methods.

3 files changed, 7 insertions, 7 deletions

diff --git a/spec/config/mail_room_spec.rb b/spec/config/mail_room_spec.rb
index 462afb24f08..6fad7e2b9e7 100644
--- a/spec/config/mail_room_spec.rb
+++ b/spec/config/mail_room_spec.rb
@@ -43,7 +43,7 @@ describe "mail_room.yml" do
       redis_config_file = Rails.root.join('config', 'resque.yml')
 
       redis_url =
-        if File.exists?(redis_config_file)
+        if File.exist?(redis_config_file)
           YAML.load_file(redis_config_file)[Rails.env]
         else
           "redis://localhost:6379"
diff --git a/spec/services/projects/create_service_spec.rb b/spec/services/projects/create_service_spec.rb
index e43903dbd3c..fd114359467 100644
--- a/spec/services/projects/create_service_spec.rb
+++ b/spec/services/projects/create_service_spec.rb
@@ -64,7 +64,7 @@ describe Projects::CreateService, services: true do
           @path = ProjectWiki.new(@project, @user).send(:path_to_repo)
         end
 
-        it { expect(File.exists?(@path)).to be_truthy }
+        it { expect(File.exist?(@path)).to be_truthy }
       end
 
       context 'wiki_enabled false does not create wiki repository directory' do
@@ -74,7 +74,7 @@ describe Projects::CreateService, services: true do
           @path = ProjectWiki.new(@project, @user).send(:path_to_repo)
         end
 
-        it { expect(File.exists?(@path)).to be_falsey }
+        it { expect(File.exist?(@path)).to be_falsey }
       end
     end
 
diff --git a/spec/services/projects/destroy_service_spec.rb b/spec/services/projects/destroy_service_spec.rb
index 1ec27077717..a5cb6f382e4 100644
--- a/spec/services/projects/destroy_service_spec.rb
+++ b/spec/services/projects/destroy_service_spec.rb
@@ -13,8 +13,8 @@ describe Projects::DestroyService, services: true do
     end
 
     it { expect(Project.all).not_to include(project) }
-    it { expect(Dir.exists?(path)).to be_falsey }
-    it { expect(Dir.exists?(remove_path)).to be_falsey }
+    it { expect(Dir.exist?(path)).to be_falsey }
+    it { expect(Dir.exist?(remove_path)).to be_falsey }
   end
 
   context 'Sidekiq fake' do
@@ -24,8 +24,8 @@ describe Projects::DestroyService, services: true do
     end
 
     it { expect(Project.all).not_to include(project) }
-    it { expect(Dir.exists?(path)).to be_falsey }
-    it { expect(Dir.exists?(remove_path)).to be_truthy }
+    it { expect(Dir.exist?(path)).to be_falsey }
+    it { expect(Dir.exist?(remove_path)).to be_truthy }
   end
 
   def destroy_project(project, user, params)