Fix client socket input client signature

lib/sensu/client/socket.rb

@@ -144,8 +144,16 @@ def publish_check_result(check)
           :client => @settings[:client][:name],
           :check => check.merge(:issued => Time.now.to_i)
         }
+        payload[:signature] = @settings[:client][:signature] if @settings[:client][:signature]
         @logger.info("publishing check result", :payload => payload)
-        @transport.publish(:direct, "results", Sensu::JSON.dump(payload))
+        @transport.publish(:direct, "results", Sensu::JSON.dump(payload)) do |info|
+          if info[:error]
+            @logger.error("failed to publish check result", {
+              :payload => payload,
+              :error => info[:error].to_s
+            })
+          end
+        end
       end
 
       # Process a check result. Set check result attribute defaults,

spec/client/socket_spec.rb

@@ -85,6 +85,19 @@
         end
       subject.publish_check_result(check_result[:check])
     end
+
+    it "publishes check result with client signature" do
+      subject.settings[:client][:signature] = "foo"
+      check_result = result_template
+      check_result[:signature] = "foo"
+      expect(logger).to receive(:info).
+        with("publishing check result", {:payload => check_result})
+      expect(transport).to receive(:publish).
+        with(:direct, "results", kind_of(String)) do |_, _, json_string|
+          expect(Sensu::JSON.load(json_string)).to eq(check_result)
+        end
+      subject.publish_check_result(check_result[:check])
+    end
   end
 
   describe "#process_check_result" do