Function mock_process_instruction 

pub fn mock_process_instruction<F: FnMut(&mut InvokeContext<'_, '_>), G: FnMut(&mut InvokeContext<'_, '_>)>(
    program_id: &Pubkey,
    instruction_data: &[u8],
    accounts: Vec<KeyedAccountSharedData>,
    instruction_account_metas: Vec<AccountMeta>,
    expected_result: Result<(), InstructionError>,
    builtin: BuiltinFunctionRegisterer,
    pre_adjustments: F,
    post_adjustments: G,
) -> Vec<AccountSharedData>