fix startup of system softioc tests waiting for log messages

Author: James Souter

tests/conftest.py

@@ -15,11 +15,13 @@
 
 import pytest
 from aioca import purge_channel_caches
+from loguru import logger as _logger
 from softioc import builder
 
 from fastcs.attributes import AttrR, AttrRW, AttrW
 from fastcs.datatypes import Bool, Float, Int, String
 from fastcs.launch import build_controller_api
+from fastcs.logging import LogLevel, configure_logging
 from fastcs.transport.tango.dsr import register_dev
 from tests.assertable_controller import MyTestAttributeIORef, MyTestController
 from tests.example_p4p_ioc import run as _run_p4p_ioc
@@ -86,6 +88,11 @@ def _run_ioc_as_subprocess(
     error_queue: multiprocessing.Queue,
     stdout_queue: multiprocessing.Queue,
 ):
+    configure_logging(LogLevel.INFO)
+    # we need to capture log messages from transport
+    logger = _logger.bind(logger_name="fastcs.transport.epics.ca.transport")
+    logger.add(print)  # forward log messages to stdout
+
     try:
         from pytest_cov.embed import cleanup_on_sigterm
     except ImportError:
@@ -127,7 +134,7 @@ def run_ioc_as_subprocess(
         start_time = time.monotonic()
         while True:
             try:
-                if "Running FastCS IOC" in (
+                if "Running IOC" in (
                     stdout_queue.get(timeout=ioc_startup_timeout)  # type: ignore
                 ):
                     stdout_queue.get()  # get the newline