test: allow passing args to executable

Add --node-args option that will pass arguments.

PR-URL: #5376
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

test/parallel/test-cluster-debug-port.js

@@ -4,7 +4,6 @@ const assert = require('assert');
 const cluster = require('cluster');
 
 if (cluster.isMaster) {
-  assert.strictEqual(process.execArgv.length, 0, 'run test with no args');
 
   function checkExitCode(code, signal) {
     assert.strictEqual(code, 0);

tools/test.py

@@ -709,6 +709,7 @@ def GetConfiguration(self, context):
       (file, pathname, description) = imp.find_module('testcfg', [ self.path ])
       module = imp.load_module('testcfg', file, pathname, description)
       self.config = module.GetConfiguration(context, self.path)
+      self.config.additional_flags = context.node_args
     finally:
       if file:
         file.close()
@@ -774,11 +775,13 @@ def GetTestStatus(self, context, sections, defs):
 
 class Context(object):
 
-  def __init__(self, workspace, buildspace, verbose, vm, timeout, processor, suppress_dialogs, store_unexpected_output):
+  def __init__(self, workspace, buildspace, verbose, vm, args, timeout,
+               processor, suppress_dialogs, store_unexpected_output):
     self.workspace = workspace
     self.buildspace = buildspace
     self.verbose = verbose
     self.vm_root = vm
+    self.node_args = args
     self.timeout = timeout
     self.processor = processor
     self.suppress_dialogs = suppress_dialogs
@@ -1281,6 +1284,8 @@ def BuildOptions():
   result.add_option("--snapshot", help="Run the tests with snapshot turned on",
       default=False, action="store_true")
   result.add_option("--special-command", default=None)
+  result.add_option("--node-args", dest="node_args", help="Args to pass through to Node",
+      default=[], action="append")
   result.add_option("--valgrind", help="Run tests through valgrind",
       default=False, action="store_true")
   result.add_option("--cat", help="Print the source of the tests",
@@ -1471,6 +1476,7 @@ def Main():
                     buildspace,
                     VERBOSE,
                     shell,
+                    options.node_args,
                     options.timeout,
                     processor,
                     options.suppress_dialogs,