@pytest.fixture(scope='function')
def linearity_validator_obj(fitted_result_obj):
    analytical_data = [[0.1, 0.2, 0.15]]
    concentration_data = [[0.1, 0.2, 0.3]]
    linearity_validator = LinearityValidator(analytical_data, concentration_data)
    linearity_validator.fitted_result = fitted_result_obj
    return linearity_validator
@pytest.fixture(scope='function')
def linearity_validator_obj(fitted_result_obj):
    analytical_data = [[0.1, 0.2, 0.15]]
    concentration_data = [[0.1, 0.2, 0.3]]
    linearity_validator = LinearityValidator(analytical_data, concentration_data)
    linearity_validator.fitted_result = fitted_result_obj
    return linearity_validator