def METHOD_NAME(self):
    """Test the get_version function of the custom backend."""
    pid = 1
    project = models.Project.get(self.session, pid)
    exp = "1.33"
    obs = backend.CustomBackend.get_version(project)
    self.assertEqual(obs, exp)
    pid = 2
    project = models.Project.get(self.session, pid)
    self.assertRaises(
        AnityaPluginException, backend.CustomBackend.get_version, project
    )
    pid = 3
    project = models.Project.get(self.session, pid)
    exp = "4.7.7"
    obs = backend.CustomBackend.get_version(project)
    self.assertEqual(obs, exp)