test: enable test-debug-brk-no-arg

Fix issues with disabled test-debug-brk-no-arg and re-enable the test.

PR-URL: https://github.com/nodejs/node/pull/7143
Reviewed-By: Fedor Indutny <fedor@indutny.com>

test/disabled/test-debug-brk-no-arg.js

@@ -1,15 +0,0 @@
-'use strict';
-var common = require('../common');
-var assert = require('assert');
-var spawn = require('child_process').spawn;
-
-var child = spawn(process.execPath, ['--debug-brk=' + common.PORT]);
-child.stderr.once('data', function(c) {
-  console.error('%j', c.toString());
-  child.stdin.end();
-});
-
-child.on('exit', function(c) {
-  assert(c === 0);
-  console.log('ok');
-});

test/parallel/test-debug-brk-no-arg.js

@@ -0,0 +1,13 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const spawn = require('child_process').spawn;
+
+const child = spawn(process.execPath, ['--debug-brk=' + common.PORT, '-i']);
+child.stderr.once('data', common.mustCall(function() {
+  child.stdin.end('.exit');
+}));
+
+child.on('exit', common.mustCall(function(c) {
+  assert.strictEqual(c, 0);
+}));