referrerpolicy=no-referrer-when-downgrade
sc_service_test

Function connectivity

Source 
pub fn connectivity<E, Fb, F>(spec: GenericChainSpec<E>, full_builder: Fb)
where
    E: ChainSpecExtension + Clone + 'static + Send + Sync,
    Fb: Fn(Configuration) -> Result<F, Error>,
    F: TestNetNode,