def METHOD_NAME(self, system_frame):
    m = system_frame
    set_operating_conditions(m)
    initialize_system(m)
    # test feed water flow
    assert value(m.fs.feed.properties[0].flow_mass_comp["H2O"]) == pytest.approx(
        4.6296, rel=1e-3
    )
    assert value(
        m.fs.feed.properties[0].flow_mass_comp["inorganic_solid"]
    ) == pytest.approx(0.33333, rel=1e-3)
    assert value(
        m.fs.feed.properties[0].flow_mass_comp["organic_solid"]
    ) == pytest.approx(0.82407, rel=1e-3)