Rename GCSCollectionClient base_url param

Use `collection_address` to match `GCSClient`.

Author: sirosen

src/globus_sdk/experimental/gcs_collection_client.py

@@ -42,22 +42,19 @@ class GCSCollectionClient(globus_sdk.BaseClient):
     A client for interacting directly with a GCS Collection.
     Typically for HTTPS upload/download via HTTPS-enabled collections.
 
-    .. note::
-
-        Because the client communicates directly with paths on the collection, rather
-        than with the Endpoint hosting it, the ``base_url`` parameter is required.
-
     .. sdk-sphinx-copy-params:: BaseClient
 
         :param collection_id: The ID of the collection.
+        :param collection_address: The URL of the collection, as might be retrieved from
+            the ``https_server`` field in Globus Transfer.
     """
 
     scopes: GCSCollectionScopes = _GCSCollectionScopesClassStub()
 
     def __init__(
         self,
         collection_id: str | uuid.UUID,
-        base_url: str,
+        collection_address: str,
         *,
         environment: str | None = None,
         app: globus_sdk.GlobusApp | None = None,
@@ -70,9 +67,12 @@ def __init__(
         self.collection_id = str(collection_id)
         self.scopes = GCSCollectionScopes(self.collection_id)
 
+        if not collection_address.startswith("https://"):
+            collection_address = f"https://{collection_address}"
+
         super().__init__(
             environment=environment,
-            base_url=base_url,
+            base_url=collection_address,
             app=app,
             app_scopes=app_scopes,
             authorizer=authorizer,

tests/unit/experimental/test_gcs_collection_client.py

@@ -34,3 +34,11 @@ def test_default_scope_is_https():
     assert client.default_scope_requirements == [
         globus_sdk.Scope("https://auth.globus.org/scopes/foo_id/https")
     ]
+
+
+# this behavior imitates the `GCSClient`, which accepts a bare hostname and prepends the
+# scheme if it is missing
+def test_https_scheme_is_added_to_bare_address():
+    client = GCSCollectionClient("foo_id", "example.com")
+
+    assert client.base_url == "https://example.com"