test: add test with leading underscore from field conflicting with GE…

…LF fields

See logstash-plugins#25

spec/inputs/gelf_spec.rb

@@ -238,4 +238,38 @@ def client_bootstrap(gelfclient, queue)
  end
  end
  end
+
+ describe "when handling complex messages" do
+ let(:host) { "127.0.0.1" }
+ let(:port) { 12211 }
+ let(:chunksize) { 1420 }
+ let(:gelfclient) { GELF::Notifier.new(host, port, chunksize) }
+
+ let(:config) { { "port" => port, "host" => host } }
+ let(:queue) { Queue.new }
+
+ subject(:gelf_input) { described_class.new(config) }
+
+ before(:each) do
+ subject.register
+ @runner = Thread.new { subject.run(queue) }
+
+ client_bootstrap(gelfclient, queue)
+ end
+
+ after(:each) do
+ subject.do_stop
+ @runner.kill
+ @runner.join
+ end
+
+ it "should not overwrite inner gelf fields" do
+ message = "level field conflicting with internal GELF level field"
+ gelfclient.notify!("short_message" => message, "_level" => "foo")
+ e = queue.pop
+ expect(e.get("message")).to eq(message)
+ # TODO fixme, level should contain a number and _level should keep the leading underscore
+ expect(e.get("level")).to eq("foo")
+ end
+ end
 end