test EM::Connection#pause on popen connections

tests/test_processes.rb

@@ -99,6 +99,24 @@ def test_em_system_spaced_arguments
 
       assert_equal("hello\n", $out)
     end
+
+    def test_em_popen_pause_resume
+      c_rx = 0
+
+      test_client = Module.new do
+        define_method :receive_data do |data|
+          c_rx += 1
+          pause
+          EM.add_timer(0.5) { EM.stop }
+        end
+      end
+
+      EM.run{
+        EM.popen('cat /dev/random', test_client)
+      }
+
+      assert_equal 1, c_rx
+    end
   else
     warn "EM.popen not implemented, skipping tests in #{__FILE__}"