Add test for Ceph bucket names.

tests/test_s3utils.py

@@ -19,12 +19,15 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import os
 import unittest
+from unittest import mock
 
 from lsst.resources.s3utils import clean_test_environment
 
 try:
     import boto3
+    from boto3.exceptions import ParamValidationError
     from moto import mock_s3
 except ImportError:
     boto3 = None
@@ -82,6 +85,14 @@ def testBucketExists(self):
         self.assertTrue(bucketExists(f"{self.bucketName}"))
         self.assertFalse(bucketExists(f"{self.bucketName}_no_exist"))
 
+    def testCephBucket(self):
+        with self.assertRaises(ParamValidationError):
+            bucketExists("foo:bar")
+
+    @mock.patch.dict(os.environ, {"LSST_CEPH_BUCKETS", "1"})
+    def testCephBucketSuccess(self):
+        self.assertFalse("foo:bar")
+
     def testFileExists(self):
         self.assertTrue(s3CheckFileExists(client=self.client, bucket=self.bucketName, path=self.fileName)[0])
         self.assertFalse(