text: """
      :codeauthor: Jayesh Kariya <jayeshk@saltstack.com>
  """
  
  
  import salt.modules.openstack_config as openstack_config
  from salt.exceptions import CommandExecutionError
  from tests.support.mixins import LoaderModuleMockMixin
  from tests.support.mock import MagicMock, patch
  from tests.support.unit import TestCase
  
  
  class OpenstackConfigTestCase(TestCase, LoaderModuleMockMixin):
      """
      Test cases for salt.modules.openstack_config
      """
  
      def setup_loader_modules(self):
          patcher = patch("salt.utils.path.which", MagicMock(return_value=True))
          patcher.start()
          self.addCleanup(patcher.stop)
          return {openstack_config: {}}
  
      # 'set_' function tests: 1
  
      def test_set(self):
          """
          Test if it set a value in an OpenStack configuration file.
          """
          mock = MagicMock(
              return_value={"retcode": 0, "stderr": "error", "stdout": "salt"}
          )
          with patch.dict(openstack_config.__salt__, {"cmd.run_all": mock}):
              self.assertEqual(
                  openstack_config.set_(
                      "/etc/keystone/keys.conf", "sql", "connection", "foo"
                  ),
                  "salt",
              )
  
          mock = MagicMock(
              return_value={"retcode": 1, "stderr": "error", "stdout": "salt"}
          )
          with patch.dict(openstack_config.__salt__, {"cmd.run_all": mock}):
              self.assertRaises(
                  CommandExecutionError,
                  openstack_config.set_,
                  "/etc/keystone/keystone.conf",
                  "sql",
                  "connection",
                  "foo",
              )
  
      # 'get' function tests: 1
  
      def test_get(self):
          """
          Test if it get a value from an OpenStack configuration file.
          """
          mock = MagicMock(
              return_value={"retcode": 0, "stderr": "error", "stdout": "salt"}
          )
          with patch.dict(openstack_config.__salt__, {"cmd.run_all": mock}):
              self.assertEqual(
                  openstack_config.get("/etc/keystone/keys.conf", "sql", "connection"),
                  "salt",
              )
  
          mock = MagicMock(
              return_value={"retcode": 1, "stderr": "error", "stdout": "salt"}
          )
          with patch.dict(openstack_config.__salt__, {"cmd.run_all": mock}):
              self.assertRaises(
                  CommandExecutionError,
                  openstack_config.get,
                  "/etc/key/keystone.conf",
                  "sql",
                  "connection",
              )
  
      # 'delete' function tests: 1
  
      def test_delete(self):
          """
          Test if it delete a value from an OpenStack configuration file.
          """
          mock = MagicMock(
              return_value={"retcode": 0, "stderr": "error", "stdout": "salt"}
          )
          with patch.dict(openstack_config.__salt__, {"cmd.run_all": mock}):
              self.assertEqual(
                  openstack_config.delete("/etc/keystone/keys.conf", "sql", "connection"),
                  "salt",
              )
  
          mock = MagicMock(
              return_value={"retcode": 1, "stderr": "error", "stdout": "salt"}
          )
          with patch.dict(openstack_config.__salt__, {"cmd.run_all": mock}):
              self.assertRaises(
                  CommandExecutionError,
                  openstack_config.delete,
                  "/etc/key/keystone.conf",
                  "sql",
                  "connection",
              )
  