tests(cgroup): add unit tests for cgroup.conf editor

Signed-off-by: Jason C. Nucciarone <nuccitheboss@ubuntu.com>

tests/unit/editors/test_cgroupconfig.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+# Copyright 2024 Canonical Ltd.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License version 3 as published by the Free Software Foundation.
+#
+# This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Unit tests for the cgroup.conf editor."""
+
+import unittest
+from pathlib import Path
+
+from slurmutils.editors import cgroupconfig
+
+
+EXAMPLE_CGROUP_CONF = """#
+# `cgroup.conf` file generated at 2024-09-18 15:10:44.652017 by slurmutils.
+#
+ConstrainCores=yes
+ConstrainDevices=yes
+ConstrainRAMSpace=yes
+ConstrainSwapSpace=yes
+"""
+
+
+class TestCgroupConfigEditor(unittest.TestCase):
+    """Unit tests for cgroup.conf file editor."""
+
+    def setUp(self) -> None:
+        Path("cgroup.conf").write_text(EXAMPLE_CGROUP_CONF)
+
+    def test_loads(self) -> None:
+        """Test `loads` method of the cgroupconfig module."""
+        config = cgroupconfig.loads(EXAMPLE_CGROUP_CONF)
+        self.assertEqual(config.constrain_cores, "yes")
+        self.assertEqual(config.constrain_devices, "yes")
+        self.assertEqual(config.constrain_ram_space, "yes")
+        self.assertEqual(config.constrain_swap_space, "yes")
+
+    def test_dumps(self) -> None:
+        """Test `dumps` method of the cgroupconfig module."""
+        config = cgroupconfig.loads(EXAMPLE_CGROUP_CONF)
+        # The new config and old config should not be equal since the
+        # timestamps in the header will be different.
+        self.assertNotEqual(cgroupconfig.dumps(config), EXAMPLE_CGROUP_CONF)
+
+    def test_edit(self) -> None:
+        """Test `edit` context manager from the cgroupconfig module."""
+        with cgroupconfig.edit("cgroup.conf") as config:
+            config.constrain_cores = "no"
+            config.constrain_devices = "no"
+            config.constrain_ram_space = "no"
+            config.constrain_swap_space = "no"
+
+        config = cgroupconfig.load("cgroup.conf")
+        self.assertEqual(config.constrain_cores, "no")
+        self.assertEqual(config.constrain_devices, "no")
+        self.assertEqual(config.constrain_ram_space, "no")
+        self.assertEqual(config.constrain_swap_space, "no")
+
+    def tearDown(self) -> None:
+        Path("cgroup.conf").unlink()