[PATCH for-5.2 v3 2/3] iotests.py: Add wait_for_runstate()

[Max Reitz]

Signed-off-by: Max Reitz <mre...@redhat.com>
---
 tests/qemu-iotests/iotests.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 3590ed78a0..20645a6e7d 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -28,6 +28,7 @@ import signal
 import struct
 import subprocess
 import sys
+import time
 from typing import (Any, Callable, Dict, Iterable,
                     List, Optional, Sequence, Tuple, TypeVar)
 import unittest
@@ -803,6 +804,10 @@ class VM(qtest.QEMUQtestMachine):
                    'Found node %s under %s (but expected %s)' % \
                    (node['name'], path, expected_node)
 
+    def wait_for_runstate(self, runstate: str) -> None:
+        while self.qmp('query-status')['return']['status'] != runstate:
+            time.sleep(0.2)
+
 index_re = re.compile(r'([^\[]+)\[([^\]]+)\]')
 
 class QMPTestCase(unittest.TestCase):
-- 
2.26.2