add test and reno

Qiskit · Feb 23, 2024 · 117628d · 117628d
1 parent 032271e
commit 117628d
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diff --git a/releasenotes/notes/require-cloud-backend-38a74144347c735d.yaml b/releasenotes/notes/require-cloud-backend-38a74144347c735d.yaml
@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    In a future release, ``backend`` will be a required argument to :class:`qiskit_ibm_runtime.Session` 
+    and :class:`qiskit_ibm_runtime.Batch` when using the ``ibm_cloud`` channel.
diff --git a/test/unit/test_session.py b/test/unit/test_session.py
@@ -44,6 +44,13 @@ def test_missing_backend(self):
         with self.assertRaises(ValueError):
             Session(service=service)
 
+    def test_missing_backend_cloud_warning(self):
+        """Test warning if no backend provided on cloud channel."""
+        service = MagicMock()
+        service.channel = "ibm_cloud"
+        with self.assertWarns(UserWarning):
+            Session(service=service)
+
     def test_passing_ibm_backend(self):
         """Test passing in IBMBackend instance."""
         backend = MagicMock(spec=IBMBackend)