def METHOD_NAME(self, m_exit_json):
    ca_test_common.set_module_args({
        'osd_id': fake_id,
        'osd_fsid': fake_uuid,
        '_ansible_check_mode': True
    })
    m_exit_json.side_effect = ca_test_common.exit_json
    with pytest.raises(ca_test_common.AnsibleExitJson) as result:
        ceph_volume_simple_activate.main()
    result = result.value.args[0]
    assert not result['changed']
    assert result['cmd'] == ['ceph-volume', '--cluster', fake_cluster, 'simple', 'activate', fake_id, fake_uuid]
    assert result['rc'] == 0
    assert not result['stdout']
    assert not result['stderr']