win: stub of end-to-end test

I'd like to write some `expect(1)`-style tests (possibly using
http://pexpect.readthedocs.org/en/stable/) to verify that various windbg
commands that I'm adding support for do actually work when consuming
minidumps in real life.

For the moment, this is just the beginnings of a stub as I don't know if
bots even have windbg/cdb installed.

R=mark@chromium.org
BUG=crashpad:20, crashpad:46, crashpad:52

Review URL: https://codereview.chromium.org/1396943002 .

build/run_tests.py

@@ -57,6 +57,15 @@ def main(args):
     print test
     print '-' * 80
     subprocess.check_call(os.path.join(binary_dir, test))
+
+  if sys.platform == 'win32':
+    name = 'snapshot/win/end_to_end_test.py'
+    print '-' * 80
+    print name
+    print '-' * 80
+    subprocess.check_call(
+        [sys.executable, os.path.join(crashpad_dir, name), args[0]])
+
   return 0
 
 

snapshot/win/end_to_end_test.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+
+# Copyright 2015 The Crashpad Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import sys
+
+
+def FindInstalledWindowsApplication(app_path):
+  search_paths = [os.getenv('PROGRAMFILES(X86)'),
+                  os.getenv('PROGRAMFILES'),
+                  os.getenv('LOCALAPPDATA')]
+  search_paths += os.getenv('PATH', '').split(os.pathsep)
+
+  for search_path in search_paths:
+    if not search_path:
+      continue
+    path = os.path.join(search_path, app_path)
+    if os.path.isfile(path):
+      return path
+
+  return None
+
+
+def GetCdbPath():
+  possible_paths = (
+      os.path.join('Windows Kits', '10', 'Debuggers', 'x64'),
+      os.path.join('Windows Kits', '10', 'Debuggers', 'x86'),
+      os.path.join('Windows Kits', '8.1', 'Debuggers', 'x64'),
+      os.path.join('Windows Kits', '8.1', 'Debuggers', 'x86'),
+      os.path.join('Windows Kits', '8.0', 'Debuggers', 'x64'),
+      os.path.join('Windows Kits', '8.0', 'Debuggers', 'x86'),
+      'Debugging Tools For Windows (x64)',
+      'Debugging Tools For Windows (x86)',
+      'Debugging Tools For Windows',
+      os.path.join('win_toolchain', 'vs2013_files', 'win8sdk', 'Debuggers',
+                    'x64'),
+      os.path.join('win_toolchain', 'vs2013_files', 'win8sdk', 'Debuggers',
+                    'x86'),
+  )
+  for possible_path in possible_paths:
+    app_path = os.path.join(possible_path, 'cdb.exe')
+    app_path = FindInstalledWindowsApplication(app_path)
+    if app_path:
+      return app_path
+  return None
+
+
+def main(args):
+  cdb_path = GetCdbPath()
+  print 'cdb_path:', cdb_path
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))