Utility for integration testing substrate runtimes

struct YourRuntimeInfo;

impl ChainInfo for YourRuntimeInfo {
    // fill in the neccessary details
}

// next create the neccessary client subsystems
let node = build_node_subsystems::<NodeTemplateChainInfo, _>(
    ConfigOrChainSpec::ChainSpec(
        Box::new(development_config()),
        tokio_runtime.handle().clone(),
    ),
    |_client, _select_chain, _keystore| {
        // chain specific block_import, consensus_data_provider and inherent_data_provider
    }
);

// create blocks, empty if no txs in in the pool
node.seal_blocks(10).await;

// submit extrinsics into the node's txpool.