Fix stat & TestCLI#test_control_for_tcp (#1470)

lib/puma/cluster.rb

@@ -279,8 +279,8 @@ module Puma
         while true
           sleep WORKER_CHECK_INTERVAL
           begin
-            b = server.backlog
-            r = server.running
+            b = server.backlog || 0
+            r = server.running || 0
             payload = %Q!#{base_payload}{ "backlog":#{b}, "running":#{r} }\n!
             io << payload
           rescue IOError

lib/puma/single.rb

@@ -5,8 +5,8 @@ require 'puma/plugin'
 module Puma
   class Single < Runner
     def stats
-      b = @server.backlog
-      r = @server.running
+      b = @server.backlog || 0
+      r = @server.running || 0
       %Q!{ "backlog": #{b}, "running": #{r} }!
     end
 

test/test_cli.rb

@@ -56,7 +56,7 @@ class TestCLI < Minitest::Test
     s = TCPSocket.new "127.0.0.1", 9877
     s << "GET /stats HTTP/1.0\r\n\r\n"
     body = s.read
-    assert_equal '{ "backlog": 0, "running": 0 }', body.split("\r\n").last
+    assert_equal '{ "backlog": 0, "running": 0 }', body.split(/\r?\n/).last
 
     cli.launcher.stop
     t.join