import time

from caproto.sync.client import read, write
import pytest

from common import read_config

TIMEOUT_READ = 2


@pytest.fixture(autouse=True)
def check_ioc_running():

    config = read_config()
    pvprefix = config['pvprefix']

    """
    This function checks if the test IOC is already running.
    """
    try:
        read(f'{pvprefix}:IOCREADY', timeout=TIMEOUT_READ)

        # Reading the check recird was successfull -> We assume that the IOC
        # is running
        return
    except TimeoutError:
        # IOC startup failed in the given time -> Raise an error
        raise Exception('Start the test IOC first ()')