test checks output

test/parallel/test-debug-brk.js

@@ -4,25 +4,23 @@ const common = require('../common');
 const spawn = require('child_process').spawn;
 
 let run = () => {};
-function test(extraArgs) {
+function test(extraArgs, stdoutPattern) {
   const next = run;
   run = () => {
+    var procStdout = '';
     var procStderr = '';
     var agentStdout = '';
+    var debuggerListening = false;
+    var outputMatched = false;
     var needToSpawnAgent = true;
     var needToExit = true;
 
     const procArgs = [`--debug-brk=${common.PORT}`].concat(extraArgs);
     const proc = spawn(process.execPath, procArgs);
     proc.stderr.setEncoding('utf8');
 
-    const exitAll = common.mustCall((processes) => {
-      processes.forEach((myProcess) => { myProcess.kill(); });
-    });
-
-    proc.stderr.on('data', (chunk) => {
-      procStderr += chunk;
-      if (/Debugger listening on/.test(procStderr) && needToSpawnAgent) {
+    const tryStartAgent = () => {
+      if (debuggerListening && outputMatched && needToSpawnAgent) {
         needToSpawnAgent = false;
         const agentArgs = ['debug', `localhost:${common.PORT}`];
         const agent = spawn(process.execPath, agentArgs);
@@ -36,6 +34,27 @@ function test(extraArgs) {
           }
         });
       }
+    };
+
+    const exitAll = common.mustCall((processes) => {
+      processes.forEach((myProcess) => { myProcess.kill(); });
+    });
+
+    if (stdoutPattern != null) {
+      proc.stdout.on('data', (chunk) => {
+        procStdout += chunk;
+        outputMatched = outputMatched || stdoutPattern.test(procStdout);
+        tryStartAgent();
+      });
+    } else {
+      outputMatched = true;
+    }
+
+    proc.stderr.on('data', (chunk) => {
+      procStderr += chunk;
+      debuggerListening = debuggerListening ||
+          /Debugger listening on/.test(procStderr);
+      tryStartAgent();
     });
 
     proc.on('exit', () => {
@@ -46,5 +65,6 @@ function test(extraArgs) {
 
 test(['-e', '0']);
 test(['-e', '0', 'foo']);
+test(['-p', 'process.argv[1]', 'foo'], /^\s*foo\s*$/);
 
 run();