Waiting for listener in TCK steps

Author: paoloambrosio

features/step_definitions/cucumber_cpp_mappings.rb

@@ -1,5 +1,6 @@
 require 'json'
-require 'os'
+require 'io/wait'
+require 'open3'
 
 module CucumberCppMappings
 
@@ -292,13 +293,13 @@ def run_feature_with_params(params)
     compile_step_definitions
     create_wire_file
     run_cucumber_cpp
-    if OS.mac?
-        puts "wait a second"
-        sleep(1)
-    end
     run_cucumber_test_feature params
-    Process.kill(9, @steps_out.pid) # for when there are no scenarios
-    Process.wait @steps_out.pid
+    begin
+        # for when there are no scenarios
+        Process.kill(:SIGTERM, @steps_thread.pid)
+        Process.wait @steps_thread.pid
+    rescue Errno::ESRCH
+    end
   end
 
   def write_main_step_definitions_file
@@ -318,7 +319,11 @@ def create_wire_file
   end
 
   def run_cucumber_cpp
-    @steps_out = IO.popen STEP_DEFINITIONS_EXE 
+    i, o, e, t = Open3.popen3(STEP_DEFINITIONS_EXE, "-v")
+    @steps_out = o
+    @steps_thread = t
+    expect(e.wait(2)).not_to be_nil
+    expect(e.readline).to start_with("Listening")
   end
 
   def run_cucumber_test_feature(params)

src/main.cpp

@@ -15,7 +15,7 @@ void acceptWireProtocol(int port, bool verbose = false) {
     SocketServer server(&protocolHandler);
     server.listen(port);
     if (verbose)
-        std::cout << "Listening on port " << port << std::endl;
+        std::cerr << "Listening on port " << port << std::endl;
     server.acceptOnce();
 }
 
@@ -28,14 +28,15 @@ int main(int argc, char **argv) {
     optionDescription.add_options()
         ("help,h", "help for cucumber-cpp")
         ("verbose,v", "verbose output")
-        ("port", value<int>(), "listening port of wireserver")
+        ("port,p", value<int>(), "listening port of wireserver")
         ;
     boost::program_options::variables_map optionVariableMap;
     boost::program_options::store( boost::program_options::parse_command_line(argc, argv, optionDescription), optionVariableMap);
     boost::program_options::notify(optionVariableMap); 
 
     if (optionVariableMap.count("help")) {
         std::cout << optionDescription << std::endl;
+        exit(0);
     }
 
     if (optionVariableMap.count("verbose")) {