adds the logic to only run extended gcsfilesystem tests when experimental env variable is set (fsspec#712)

Author: ankitaluthra1

.github/workflows/ci.yml

@@ -41,8 +41,7 @@ jobs:
           pytest -vv -s \
           --log-format="%(asctime)s %(levelname)s %(message)s" \
           --log-date-format="%H:%M:%S" \
-          gcsfs/ \
-          --ignore=gcsfs/tests/test_extended_gcsfs.py
+          gcsfs/
       - name: Run Extended Tests
         run: |
           export GOOGLE_APPLICATION_CREDENTIALS=$(pwd)/gcsfs/tests/fake-secret.json

gcsfs/tests/test_extended_gcsfs.py

@@ -20,6 +20,17 @@
 lines = io.BytesIO(json_data).readlines()
 file_size = len(json_data)
 
+REQUIRED_ENV_VAR = "GCSFS_EXPERIMENTAL_ZB_HNS_SUPPORT"
+
+# If the condition is True, only then tests in this file are run.
+should_run = os.getenv(REQUIRED_ENV_VAR, "false").lower() in (
+    "true",
+    "1",
+)
+pytestmark = pytest.mark.skipif(
+    not should_run, reason=f"Skipping tests: {REQUIRED_ENV_VAR} env variable is not set"
+)
+
 
 @pytest.fixture
 def zonal_mocks():