[test] add --no-harness option to debugger tests.

test/debugger/testcfg.py

 # Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import re
 
 from testrunner.local import testsuite
 from testrunner.objects import testcase
 
@@ skipping 33 matching lines @@
     files_match = FILES_PATTERN.search(source);
     # Accept several lines of 'Files:'.
     while True:
       if files_match:
         files_list += files_match.group(1).strip().split()
         files_match = FILES_PATTERN.search(source, files_match.end())
       else:
         break
 
     files = []
-    files.append(os.path.normpath(os.path.join(self.root, "..", "mjsunit", "mjsunit.js")))
+    if not context.no_harness and not NO_HARNESS_PATTERN.search(source):

[caitp, 2017/05/08 13:26:21]

This line throws for me since NO_HARNESS_PATTERN is undefined in this file. It
can be fixed by copying that line from the mjsunit testcfg.py

[Michael Achenbach, 2017/05/08 13:34:23]

Yea - the right side isn't covered on our bots. I'd revert this and we should
reland it fixed and with other required changes.

Why do you even need this locally? Do you try to make it work with custom
snapshot? On the bot we only test mjsunit with --no-harness.

+      files.append(os.path.normpath(os.path.join(self.root, "..", "mjsunit", "mjsunit.js")))
     files.append(os.path.join(self.root, "test-api.js"))
     files.extend([ os.path.normpath(os.path.join(self.root, '..', '..', f))
                   for f in files_list ])
     if MODULE_PATTERN.search(source):
       files.append("--module")
     files.append(os.path.join(self.root, testcase.path + self.suffix()))
 
     flags += files
     if context.isolates:
       flags.append("--isolate")
       flags += files
 
     return testcase.flags + flags
 
   def GetSourceForTest(self, testcase):
     filename = os.path.join(self.root, testcase.path + self.suffix())
     with open(filename) as f:
       return f.read()
 
 def GetSuite(name, root):
   return DebuggerTestSuite(name, root)