Correct more usages of non-relative `fixture_file_upload` paths

spec/features/projects/jobs/permissions_spec.rb

@@ -88,8 +88,7 @@ describe 'Project Jobs Permissions' do
   describe 'artifacts page' do
     context 'when recent job has artifacts available' do
       before do
-        artifacts = Rails.root.join('spec/fixtures/ci_build_artifacts.zip')
-        archive = fixture_file_upload(artifacts, 'application/zip')
+        archive = fixture_file_upload('spec/fixtures/ci_build_artifacts.zip')
         job.update_attributes(legacy_artifacts_file: archive)
       end

spec/helpers/emails_helper_spec.rb

@@ -47,9 +47,7 @@ describe EmailsHelper do
   describe '#header_logo' do
     context 'there is a brand item with a logo' do
       it 'returns the brand header logo' do
-        appearance = create :appearance, header_logo: fixture_file_upload(
-          Rails.root.join('spec/fixtures/dk.png')
-        )
+        appearance = create :appearance, header_logo: fixture_file_upload('spec/fixtures/dk.png')
         expect(header_logo).to eq(
           %{<img style="height: 50px" src="/uploads/-/system/appearance/header_logo/#{appearance.id}/dk.png" alt="Dk" />}

spec/helpers/groups_helper_spec.rb

@@ -4,9 +4,9 @@ describe GroupsHelper do
   include ApplicationHelper
   describe 'group_icon' do
-    avatar_file_path = File.join(Rails.root, 'spec', 'fixtures', 'banana_sample.gif')
-
     it 'returns an url for the avatar' do
+      avatar_file_path = File.join('spec', 'fixtures', 'banana_sample.gif')
+
       group = create(:group)
       group.avatar = fixture_file_upload(avatar_file_path)
       group.save!
@@ -17,9 +17,9 @@ describe GroupsHelper do
   end
   describe 'group_icon_url' do
-    avatar_file_path = File.join(Rails.root, 'spec', 'fixtures', 'banana_sample.gif')
-
     it 'returns an url for the avatar' do
+      avatar_file_path = File.join('spec', 'fixtures', 'banana_sample.gif')
+
       group = create(:group)
       group.avatar = fixture_file_upload(avatar_file_path)
       group.save!

spec/requests/api/project_import_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe API::ProjectImport do
   let(:export_path) { "#{Dir.tmpdir}/project_export_spec" }
   let(:user) { create(:user) }
-  let(:file) { File.join(Rails.root, 'spec', 'features', 'projects', 'import_export', 'test_project_export.tar.gz') }
+  let(:file) { File.join('spec', 'features', 'projects', 'import_export', 'test_project_export.tar.gz') }
   let(:namespace) { create(:group) }
   before do
     allow_any_instance_of(Gitlab::ImportExport).to receive(:storage_path).and_return(export_path)

spec/services/projects/update_pages_service_spec.rb

@@ -10,7 +10,7 @@ describe Projects::UpdatePagesService do
   let(:file) { fixture_file_upload("spec/fixtures/pages.#{extension}") }
   let(:empty_file) { fixture_file_upload("spec/fixtures/pages_empty.#{extension}") }
   let(:metadata) do
-    filename = Rails.root + "spec/fixtures/pages.#{extension}.meta"
+    filename = "spec/fixtures/pages.#{extension}.meta"
     fixture_file_upload(filename) if File.exist?(filename)
   end

spec/uploaders/gitlab_uploader_spec.rb

@@ -62,7 +62,7 @@ describe GitlabUploader do
       expect(FileUtils).to receive(:mv).with(anything, /^#{subject.work_dir}/).and_call_original
       expect(FileUtils).to receive(:mv).with(/^#{subject.work_dir}/, /#{subject.cache_dir}/).and_call_original
-      fixture = Rails.root.join('spec', 'fixtures', 'rails_sample.jpg')
+      fixture = File.join('spec', 'fixtures', 'rails_sample.jpg')
       subject.cache!(fixture_file_upload(fixture))
       expect(subject.file.path).to match(/#{subject.cache_dir}/)

spec/uploaders/job_artifact_uploader_spec.rb

@@ -29,8 +29,7 @@ describe JobArtifactUploader do
     context 'when trace is stored in File storage' do
       context 'when file exists' do
         let(:file) do
-          fixture_file_upload(
-            Rails.root.join('spec/fixtures/trace/sample_trace'), 'text/plain')
+          fixture_file_upload('spec/fixtures/trace/sample_trace', 'text/plain')
         end
         before do
@@ -63,8 +62,7 @@ describe JobArtifactUploader do
   context 'file is stored in valid local_path' do
     let(:file) do
-      fixture_file_upload(
-        Rails.root.join('spec/fixtures/ci_build_artifacts.zip'), 'application/zip')
+      fixture_file_upload('spec/fixtures/ci_build_artifacts.zip', 'application/zip')
     end
     before do
@@ -81,7 +79,7 @@ describe JobArtifactUploader do
   describe "#migrate!" do
     before do
-      uploader.store!(fixture_file_upload(File.join('spec/fixtures/trace/sample_trace')))
+      uploader.store!(fixture_file_upload('spec/fixtures/trace/sample_trace'))
       stub_artifacts_object_storage
     end

spec/uploaders/legacy_artifact_uploader_spec.rb

@@ -44,8 +44,7 @@ describe LegacyArtifactUploader do
   context 'file is stored in valid path' do
     let(:file) do
-      fixture_file_upload(
-        Rails.root.join('spec/fixtures/ci_build_artifacts.zip'), 'application/zip')
+      fixture_file_upload('spec/fixtures/ci_build_artifacts.zip', 'application/zip')
     end
     before do