Exclude problematic formats from tests, rather than including all other platforms

test/same-gyp-name/gyptest-all.py

 #!/usr/bin/env python
 
 # Copyright (c) 2011 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Build a .gyp that depends on 2 gyp files with the same name.
 """
 
 import TestGyp
 
 # This causes a problem on XCode (duplicate ID).
 # See http://code.google.com/p/gyp/issues/detail?id=114
-test = TestGyp.TestGyp(formats=['msvs', 'scons', 'make', 'ninja'])
+test = TestGyp.TestGyp(formats=['!xcode'])
 
 test.run_gyp('all.gyp', chdir='src')
 
 test.relocate('src', 'relocate/src')
 
 test.build('all.gyp', test.ALL, chdir='relocate/src')
 
 expect1 = """\
 Hello from main1.cc
 """
 
 expect2 = """\
 Hello from main2.cc
 """
 
 test.run_built_executable('program1', chdir='relocate/src', stdout=expect1)
 test.run_built_executable('program2', chdir='relocate/src', stdout=expect2)
 
 test.pass_test()