Use a response file for gn refs when running 'analyze' on gn bots.

tools/mb/mb_unittest.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Tests for mb.py."""
 
 import json
 import sys
 import unittest
 
@@ skipping 29 matching lines @@
 
   def Print(self, *args, **kwargs):
     sep = kwargs.get('sep', ' ')
     end = kwargs.get('end', '\n')
     f = kwargs.get('file', sys.stdout)
     if f == sys.stderr:
       self.err += sep.join(args) + end
     else:
       self.out += sep.join(args) + end
 
+  def TempFile(self):
+    return FakeFile(self.files)
+
+  def RemoveFile(self, path):
+    del self.files[path]
+
+
+class FakeFile(object):
+  def __init__(self, files):
+    self.name = '/tmp/file'
+    self.buf = ''
+    self.files = files
+
+  def write(self, contents):
+    self.buf += contents
+
+  def close(self):
+     self.files[self.name] = self.buf
+
+
 class IntegrationTest(unittest.TestCase):
   def test_validate(self):
     # Note that this validates that the actual mb_config.pyl is valid.
     ret = mb.main(['validate', '--quiet'])
     self.assertEqual(ret, 0)
 
 
 TEST_CONFIG = """\
 {
   'common_dev_configs': ['gn_debug'],
@@ skipping 59 matching lines @@
       self.assertEqual(mbw.out, out)
     if err is not None:
       self.assertEqual(mbw.err, err)
     return mbw
 
   def test_gn_analyze(self):
     files = {'/tmp/in.json': """{\
                "files": ["foo/foo_unittest.cc"],
                "targets": ["foo_unittests", "bar_unittests"]
              }"""}
+
     mbw = self.fake_mbw(files)
     mbw.Call = lambda cmd: (0, 'out/Default/foo_unittests\n', '')
 
     self.check(['analyze', '-c', 'gn_debug', '//out/Default',
                 '/tmp/in.json', '/tmp/out.json'], mbw=mbw, ret=0)
     out = json.loads(mbw.files['/tmp/out.json'])
     self.assertEqual(out, {
       'status': 'Found dependency',
       'targets': ['foo_unittests'],
       'build_targets': ['foo_unittests']
@@ skipping 63 matching lines @@
 
   def test_lookup(self):
     self.check(['lookup', '-c', 'gn_debug'], ret=0)
 
   def test_validate(self):
     self.check(['validate'], ret=0)
 
 
 if __name__ == '__main__':
   unittest.main()