Merge branch 'mk-fix-ruby3-test-failure' into 'master'

Fix test that fails on Ruby 3

See merge request !103588



Merged-by: Stan Hu <stanhu@gmail.com>
Approved-by: Aleksei Lipniagov <alipniagov@gitlab.com>
Co-authored-by: Matthias Kaeppler <mkaeppler@gitlab.com>

spec/lib/gitlab/request_forgery_protection_spec.rb

@@ -14,15 +14,9 @@
   end
 
   it 'logs to /dev/null' do
-    logger = described_class::Controller.new.logger
+    expect(ActiveSupport::Logger).to receive(:new).with(File::NULL)
 
-    # Taken from ActiveSupport.logger_outputs_to?
-    # There is no equivalent /dev/null stream like STDOUT, so
-    # we need to extract the path.
-    logdev = logger.instance_variable_get(:@logdev)
-    logger_source = logdev.dev
-
-    expect(logger_source.path).to eq(File::NULL)
+    described_class::Controller.new.logger
   end
 
   describe '.call' do