ftests: Add a python cgcreate test with an empty controller field

Add a functional test that exercises the Python binding's
create() method with no controller specified.

-----------------------------------------------------------------
Test Results:
        Run Date:                          Dec 24 14:59:32
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                                            Time (sec)
        ----------------------------------------------------------
        setup                                                 0.00
        044-pybindings-cgcreate_empty_controller.py           0.04
        teardown                                              0.00
        ----------------------------------------------------------
        Total Run Time                                        0.04

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>

diff --git a/ftests/044-pybindings-cgcreate_empty_controller.py b/ftests/044-pybindings-cgcreate_empty_controller.py
new file mode 100755 (executable)
index 0000000..33d594a
--- /dev/null
+++ b/ftests/044-pybindings-cgcreate_empty_controller.py
@@ -0,0 +1,92 @@
+#!/usr/bin/env python3
+#
+# empty cgcreate functionality test using the python bindings
+#
+# Copyright (c) 2021-2022 Oracle and/or its affiliates.
+# Author: Tom Hromatka <tom.hromatka@oracle.com>
+#
+
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of version 2.1 of the GNU Lesser General Public License as
+# published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library; if not, see <http://www.gnu.org/licenses>.
+#
+
+from cgroup import CgroupVersion
+from cgroup import Cgroup as CgroupCli
+from libcgroup import Cgroup, Version
+import consts
+import ftests
+import os
+from run import Run
+import sys
+
+CONTROLLER = 'cpu'
+PARENT_NAME = '044cgcreate'
+CGNAME = os.path.join(PARENT_NAME, 'madeviapython')
+
+def prereqs(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    if config.args.container:
+        result = consts.TEST_SKIPPED
+        cause = "This test cannot be run within a container"
+        return result, cause
+
+    if CgroupVersion.get_version(CONTROLLER) != CgroupVersion.CGROUP_V2:
+        result = consts.TEST_SKIPPED
+        cause = "This test requires cgroup v2"
+
+    return result, cause
+
+def setup(config):
+    user_name = Run.run('whoami', shell_bool=True)
+    group_name = Run.run('groups', shell_bool=True).split(' ')[0]
+
+    CgroupCli.create(config, controller_list=CONTROLLER, cgname=PARENT_NAME,
+                     user_name=user_name, group_name=group_name)
+
+def test(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    cg = Cgroup(CGNAME, Version.CGROUP_V2)
+    cg.create()
+
+    # Read a valid file within the newly created cgroup.
+    # This should fail if the cgroup was not created successfully
+    cg.add_setting(setting_name="cgroup.procs")
+    cg.cgxget()
+
+    return result, cause
+
+def teardown(config):
+    CgroupCli.delete(config, None, CGNAME)
+
+def main(config):
+    [result, cause] = prereqs(config)
+    if result != consts.TEST_PASSED:
+        return [result, cause]
+
+    setup(config)
+    [result, cause] = test(config)
+    teardown(config)
+
+    return [result, cause]
+
+if __name__ == '__main__':
+    config = ftests.parse_args()
+    # this test was invoked directly.  run only it
+    config.args.num = int(os.path.basename(__file__).split('-')[0])
+    sys.exit(ftests.main(config))
+
+# vim: set et ts=4 sw=4: