def test_experiment_variables(jikken_experiment):
    'test variables are initialized properly and are not settable'
    (exp, expected_variables, *_) = jikken_experiment
    assert (exp.variables == expected_variables)
    with pytest.raises(AttributeError):
        exp.variables = expected_variables
test variables are initialized properly and are not settable
def test_experiment_variables(jikken_experiment):
    
    (exp, expected_variables, *_) = jikken_experiment
    assert (exp.variables == expected_variables)
    with pytest.raises(AttributeError):
        exp.variables = expected_variables