Readd missing unittests for owners

tests/owners_unittest.py

Index: tests/owners_unittest.py
diff --git a/tests/owners_unittest.py b/tests/owners_unittest.py
index 4f9db7f240405d108fbc8731018e875f01fe1085..0e32ae0441966ca7b33ce17edfa9c46b5c55f541 100755
--- a/tests/owners_unittest.py
+++ b/tests/owners_unittest.py
@@ -49,6 +49,7 @@ def test_repo():
     '/content/baz/froboz.h': '',
     '/content/views/OWNERS': owners_file(ben, john, owners.EVERYONE,
                                          noparent=True),
+    '/content/views/pie.h': '',
   })
 
 
@@ -157,6 +158,30 @@ class OwnersDatabaseTest(unittest.TestCase):
   def test_reviewers_for__wildcard_dir(self):
     self.assert_reviewers_for(['DEPS'], [owners.EVERYONE])
 
+  def test_reviewers_for__one_owner(self):
+    self.assert_reviewers_for([
+        '/chrome/gpu/gpu_channel.h',
+        '/content/baz/froboz.h',
+        '/chrome/renderer/gpu/gpu_channel_host.h'], [brett])
+
+  def test_reviewers_for__two_owners(self):
+    self.assert_reviewers_for([
+        '/chrome/gpu/gpu_channel.h',
+        '/content/content.gyp',
+        '/content/baz/froboz.h',
+        '/content/views/pie.h'
+        ], [john, brett])
+
+  def test_reviewers_for__all_files(self):
+    self.assert_reviewers_for([
+        '/chrome/gpu/gpu_channel.h',
+        '/chrome/renderer/gpu/gpu_channel_host.h',
+        '/chrome/renderer/safe_browsing/scorer.h',
+        '/content/content.gyp',
+        '/content/bar/foo.cc',
+        '/content/baz/froboz.h',
+        '/content/views/pie.h'], [john, brett])
+
   def assert_syntax_error(self, owners_file_contents):
     db = self.db()
     self.files['/foo/OWNERS'] = owners_file_contents