def METHOD_NAME():
    """Test that a variable can be create and written to file"""
    with temporary_directory() as tmp_dir:
        test_store = tmp_dir + '/teststore.nc'
        driver = spawn_driver(test_store)
        si = StorageInterface(driver)
        input_data = np.eye(3) * 4.0
        si.four.append(input_data)
        si.four.append(input_data)
        output_data = si.four.read()
        assert np.all(output_data[0] == input_data)
        assert np.all(output_data[1] == input_data)