fix(bigquery): raise error if bigquery project id cannot be identified

Author: dlstadther

ibis/backends/bigquery/__init__.py

@@ -446,6 +446,13 @@ def do_connect(
 
         project_id = client_project_id or project_id or default_project_id
 
+        if project_id is None:
+            raise ValueError(
+                "Project ID could not be identified. "
+                "Provide either explicit `project_id`, `client` with project, "
+                "or don't provide an explicit `credentials` object."
+            )
+
         (
             self.data_project,
             self.billing_project,

ibis/backends/bigquery/tests/system/test_connect.py

@@ -274,3 +274,8 @@ def test_project_id_from_default(default_credentials):
     # `connect()` re-evaluates default credentials and sets project_id since no client nor explicit project_id is provided
     con = ibis.bigquery.connect()
     assert con.project_id == default_project_id
+
+
+def test_project_id_missing(credentials):
+    with pytest.raises(ValueError, match="Project ID could not be identified.*"):
+        ibis.bigquery.connect(credentials=credentials)