Suppress Qt warning in unittests.

qutebrowser/test/browser/test_tabhistory.py

@@ -27,6 +27,7 @@ from PyQt5.QtWebKitWidgets import QWebPage
 from qutebrowser.browser import tabhistory
 from qutebrowser.browser.tabhistory import TabHistoryItem as Item
 from qutebrowser.utils import qtutils
+from qutebrowser.test import helpers
 
 
 class SerializeHistoryTests(unittest.TestCase):
@@ -61,6 +62,7 @@ class SerializeHistoryTests(unittest.TestCase):
 
     def test_count(self):
         """Check if the history's count was loaded correctly."""
+        with helpers.disable_logger('qt'):
             self.assertEqual(self.history.count(), len(self.items))
 
     def test_valid(self):

qutebrowser/test/helpers.py

@@ -20,6 +20,7 @@
 """Helpers needed by tests."""
 
 import os
+import logging
 import contextlib
 from unittest import mock
 
@@ -55,6 +56,16 @@ def environ_set_temp(env):
             del os.environ[name]
 
 
+@contextlib.contextmanager
+def disable_logger(name):
+    """Temporarily disable a logger."""
+    logging.getLogger(name).propagate = False
+    try:
+        yield
+    finally:
+        logging.getLogger(name).propagate = True
+
+
 def fake_keyevent(key, modifiers=0, text=''):
     """Generate a new fake QKeyPressEvent."""
     evtmock = mock.create_autospec(QKeyEvent, instance=True)