qa/cephadm: Add test for --format=yaml

Signed-off-by: Sebastian Wagner <sebastian.wagner@suse.com>

qa/suites/rados/cephadm/workunits/task/test_orch_cli.yaml

@@ -15,3 +15,4 @@ tasks:
 - cephfs_test_runner:
     modules:
       - tasks.cephfs.test_nfs
+      - tasks.cephadm_cases.test_cli

qa/tasks/cephadm_cases/test_cli.py

@@ -0,0 +1,37 @@
+import logging
+
+from tasks.mgr.mgr_test_case import MgrTestCase
+
+log = logging.getLogger(__name__)
+
+
+class TestCephadmCLI(MgrTestCase):
+    def _cmd(self, *args):
+        return self.mgr_cluster.mon_manager.raw_cluster_cmd(*args)
+
+    def _orch_cmd(self, *args):
+        return self._cmd("orch", *args)
+
+    def setUp(self):
+        super(TestCephadmCLI, self).setUp()
+
+    def test_yaml(self):
+        """
+        to prevent oddities like
+
+        >>> import yaml
+        ... from collections import OrderedDict
+        ... assert yaml.dump(OrderedDict()) == '!!python/object/apply:collections.OrderedDict\\n- []\\n'
+        """
+        out = self._orch_cmd('device', 'ls', '--format', 'yaml')
+        self.assertNotIn('!!python', out)
+
+        out = self._orch_cmd('host', 'ls', '--format', 'yaml')
+        self.assertNotIn('!!python', out)
+
+        out = self._orch_cmd('ls', '--format', 'yaml')
+        self.assertNotIn('!!python', out)
+
+        out = self._orch_cmd('ps', '--format', 'yaml')
+        self.assertNotIn('!!python', out)
+