fix: fix unit test that could be broken by user's environment (#239)

Unit test for the `google.cloud.bigtable.Client` constructor was picking up the project from user's `GOOGLE_CLOUD_PROJECT` environment variable.

Author: Chris Rossi

tests/unit/test_client.py

@@ -103,6 +103,7 @@ def _get_target_class():
  def _make_one(self, *args, **kwargs):
  return self._get_target_class()(*args, **kwargs)
 
+ @mock.patch("os.environ", {})
  def test_constructor_defaults(self):
  from google.cloud.bigtable.client import _CLIENT_INFO
  from google.cloud.bigtable.client import DATA_SCOPE