You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: return_data.rs
    path of file: ./repos/solana/program-test/tests
    
    the code of the file until where you have to start completion: use {
    assert_matches::assert_matches,
    solana_banks_client::BanksClientError,
    solana_program_test::{processor, ProgramTest},
    solana_sdk::{
        account_info::{next_account_info, AccountInfo},
        commitment_config::CommitmentLevel,
        entrypoint::Progra
    
async fn simulation_return_data() {
    let error_set_return_data_program_id = Pubkey::new_unique();
    let program_test = ProgramTest::new(
        "error_set_return_data",
        error_set_return_data_program_id,
        processor!(error_set_return_data_process_instruction),
    );

    let mut context = program_test.start_with_context().await;
    let expected_data = vec![240, 159, 166, 150];
    let instructions = vec![Instruction {
        program_id: error_set_return_data_program_id,
        accounts: vec![],
        data: expected_data.clone(),
    }];

    let transaction = Transaction::new_signed_with_payer(
        &instructions,
        Some(&context.payer.pubkey()),
        &[&context.payer],
        context.last_blockhash,
    );

    let error = context
        .banks_client
        .process_transaction_with_preflight_and_commitment(transaction, CommitmentLevel::Confirmed)
        .await
        .unwrap_err();
    assert_matches!(
        error,
        BanksClientError::SimulationError {
            return_data: Some(TransactionReturnData {
                program_id,
                data,
            }),
            ..
        } if program_id == error_set_return_data_program_id && data == expected_data
    );
}