def METHOD_NAME(self):
    script = self.script_from_string(
        """
        import streamlit as st
        st.radio("radio", options=["a", "b", "c"])
        st.radio("default index", options=["a", "b", "c"], index=2)
        """,
    )
    sr = script.run()
    assert sr.radio
    assert sr.radio[0].value == "a"
    assert sr.radio[1].value == "c"
    r = sr.radio[0].set_value("b")
    assert r.index == 1
    assert r.value == "b"
    sr2 = r.run()
    assert sr2.radio[0].value == "b"
    assert [s.value for s in sr2.radio] == ["b", "c"]