Geo: Allow Geo log cursor to log output to stdout

ee/bin/geo_log_cursor

@@ -41,12 +41,6 @@ class GeoLogCursorOptionParser
   end
 end
 
-module StdoutLogger
-  def full_log_path
-    STDOUT
-  end
-end
-
 if $0 == __FILE__
   options = GeoLogCursorOptionParser.parse(ARGV)
 
@@ -57,7 +51,7 @@ if $0 == __FILE__
     # Monkey patch the logging class because multiple places use it (that
     # contain mostly class methods) and is not possible to pass
     # options[:stdout_logging] around without a refactor.
-    Gitlab::Geo::Logger.extend(StdoutLogger)
+    Gitlab::Geo::Logger.extend(Gitlab::Geo::Logger::StdoutLogger)
   end
 
   Gitlab::Geo::LogCursor::Daemon.new(options).run!

ee/lib/gitlab/geo/logger.rb

@@ -3,6 +3,12 @@
 module Gitlab
   module Geo
     class Logger < ::Gitlab::JsonLogger
+      module StdoutLogger
+        def full_log_path
+          $stdout
+        end
+      end
+
       def self.file_name_noext
         'geo'
       end

ee/spec/lib/gitlab/geo/log_cursor/logger_spec.rb

 require 'spec_helper'
 
-describe Gitlab::Geo::LogCursor::Logger do
+describe Gitlab::Geo::LogCursor::Logger, :geo do
   class LoggerSpec; end
 
   subject(:logger) { described_class.new(LoggerSpec) }
@@ -39,4 +39,16 @@ describe Gitlab::Geo::LogCursor::Logger do
       logger.event_info(Time.now, 'Test')
     end
   end
+
+  context 'when class is extended with StdoutLogger' do
+    it 'logs to stdout' do
+      message = 'this message should appear on stdout'
+      Gitlab::Geo::Logger.extend(Gitlab::Geo::Logger::StdoutLogger)
+      # This is needed because otherwise https://gitlab.com/gitlab-org/gitlab-ee/blob/master/config/environments/test.rb#L52
+      # sets the default logging level to :fatal when running under CI
+      allow(Rails.logger).to receive(:level).and_return(:info)
+
+      expect { logger.info(message) }.to output(/#{message}/).to_stdout
+    end
+  end
 end