assert warnmsg occurs in _get_rpm_name function

repos/system_upgrade/common/actors/scansourcefiles/tests/unit_test_scansourcefiles.py

@@ -48,6 +48,11 @@ def mocked_run(cmd, *args, **kwargs):
     monkeypatch.setattr(api, 'current_logger', testutils.logger_mocked())
     assert scansourcefiles._get_rpm_name(input_file) == run_output['stdout'][0]
 
+    if len(run_output['stdout']) > 1:
+        expected_warnmsg = ('The {} file is owned by multiple rpms: {}.'
+                            .format(input_file, ', '.join(run_output['stdout'])))
+        assert api.current_logger.warnmsg == [expected_warnmsg]
+
 
 def test_get_rpm_name_error(monkeypatch):
     input_file = '/file'