use solana_program::{
    instruction::{AccountMeta, Instruction},
    pubkey::Pubkey,
    sysvar::{self},
};
use solana_program_test::{processor, BanksClientExt, ProgramTest};
use solana_sdk::{signature::Signer, transaction::Transaction};
use spl_example_sysvar::processor::process_instruction;
use std::str::FromStr;

#[tokio::test]
async fn test_sysvar() {
    let program_id = Pubkey::from_str(&"Sysvar1111111111111111111111111111111111111").unwrap();
    let (mut banks_client, payer, recent_blockhash) = ProgramTest::new(
        "spl_example_sysvar",
        program_id,
        processor!(process_instruction),
    )
    .start()
    .await;

    let mut transaction = Transaction::new_with_payer(
        &[Instruction::new(
            program_id,
            &(),
            vec![AccountMeta::new(sysvar::clock::id(), false)],
        )],
        Some(&payer.pubkey()),
    );
    transaction.sign(&[&payer], recent_blockhash);
    banks_client.process_transaction(transaction).await.unwrap();
}