Make GYP build usable for day-to-day work

test/preparser/testcfg.py

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 104 matching lines @@
         testsource = source
         for key in replacement.keys():
           testname = testname.replace("$"+key, replacement[key]);
           testsource = testsource.replace("$"+key, replacement[key]);
         Test(testname, testsource, expectation)
       return MkTest
     eval(compile(source, pathname, "exec"),
          {"Test": Test, "Template": Template}, {})
 
   def ListTests(self, current_path, path, mode, variant_flags):
-    executable = join('obj', 'preparser', mode, 'preparser')
+    executable = 'preparser'
     if utils.IsWindows():
       executable += '.exe'
     executable = join(self.context.buildspace, executable)
+    if not exists(executable):
+      executable = join('obj', 'preparser', mode, 'preparser')
+      if utils.IsWindows():
+        executable += '.exe'
+      executable = join(self.context.buildspace, executable)
     expectations = self.GetExpectations()
     result = []
     # Find all .js files in tests/preparser directory.
     filenames = [f[:-3] for f in os.listdir(self.root) if f.endswith(".js")]
     filenames.sort()
     for file in filenames:
       throws = None;
       if (file in expectations):
         throws = expectations[file]
       result.append(PreparserTestCase(self.root,
@@ skipping 13 matching lines @@
     status_file = join(self.root, 'preparser.status')
     if exists(status_file):
       test.ReadConfigurationInto(status_file, sections, defs)
 
   def VariantFlags(self):
     return [[]];
 
 
 def GetConfiguration(context, root):
   return PreparserTestConfiguration(context, root)