Tests should run without live Google Cloud authentication

[kbighorse]

Problem

The test tests/transfers/test_contact_with_multiple_wells.py::test_multiple_wells fails when Google Cloud credentials are expired or unavailable locally:

google.auth.exceptions.RefreshError: Reauthentication is needed. Please run `gcloud auth application-default login` to reauthenticate.

The test calls WellTransferer which invokes get_cached_elevations() that accesses Google Cloud Storage.

Suggested Solutions

1. Mock GCS calls in tests - Use unittest.mock or pytest-mock to mock the get_storage_bucket() and related GCS functions during tests

2. Skip tests requiring GCS when credentials unavailable - Add a pytest marker like @pytest.mark.requires_gcs and skip when GOOGLE_APPLICATION_CREDENTIALS is not set or invalid

3. Use local fixtures - Provide cached elevation data as a test fixture instead of fetching from GCS

Benefits

• Tests can run locally without cloud credentials
• Faster test execution (no network calls)
• More reliable CI/CD (not dependent on credential refresh)
• Better test isolation

Affected Files

• tests/transfers/test_contact_with_multiple_wells.py
• transfers/well_transfer.py (get_cached_elevations(), WellTransferer)
• transfers/util.py (download_blob_json())

[ksmuczynski]

I was running into something similar when attempting to test the Field Parameters transfer.