YouCompleteMe Ninja integration should accept dirs named out_*

tools/vim/tests/chromium.ycm_extra_conf_unittest.py

Index: tools/vim/tests/chromium.ycm_extra_conf_unittest.py
diff --git a/tools/vim/tests/chromium.ycm_extra_conf_unittest.py b/tools/vim/tests/chromium.ycm_extra_conf_unittest.py
index 303207055f7bbc6462a03ff0635699ae8b110d7d..d0a555851d93c4996ce9d5be748115b8cfbcce5a 100755
--- a/tools/vim/tests/chromium.ycm_extra_conf_unittest.py
+++ b/tools/vim/tests/chromium.ycm_extra_conf_unittest.py
@@ -163,6 +163,18 @@ class Chromium_ycmExtraConfTest(unittest.TestCase):
         '-I[OUT]/tag-one'
         ])
 
+  def testOutDirNames(self):
+    out_root = os.path.join(self.chrome_root, 'out_with_underscore')
+    out_dir = os.path.join(out_root, 'Debug')
+    shutil.move(os.path.join(self.chrome_root, 'out'),
+        out_root)
+
+    clang_options = \
+        self.ycm_extra_conf.GetClangOptionsFromNinjaForFilename(
+            self.chrome_root, os.path.join(self.chrome_root, 'one.cpp'))
+    self.assertIn('-I%s/a' % out_dir, clang_options)
+    self.assertIn('-I%s/tag-one' % out_dir, clang_options)
+
   def testGetFlagsForFileForKnownCppFile(self):
     result = self.ycm_extra_conf.FlagsForFile(
         os.path.join(self.chrome_root, 'one.cpp'))