Add missing qutebrowser.test.log module.

qutebrowser/test/log.py

@@ -0,0 +1,66 @@
+# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
+
+# Copyright 2015 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
+#
+# This file is part of qutebrowser.
+#
+# qutebrowser is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# qutebrowser is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with qutebrowser.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Logging setup for the tests."""
+
+import logging
+
+from PyQt5.QtCore import (QtDebugMsg, QtWarningMsg, QtCriticalMsg, QtFatalMsg,
+                          qInstallMessageHandler)
+
+
+def init():
+    """Initialize logging for the tests."""
+    logging.basicConfig(format='\nLOG %(levelname)s %(name)s '
+                        '%(module)s:%(funcName)s:%(lineno)d %(message)s',
+                        level=logging.WARNING)
+    logging.captureWarnings(True)
+    qInstallMessageHandler(qt_message_handler)
+
+
+def qt_message_handler(msg_type, context, msg):
+    """Qt message handler to redirect qWarning etc. to the logging system.
+
+    Args:
+        QtMsgType msg_type: The level of the message.
+        QMessageLogContext context: The source code location of the message.
+        msg: The message text.
+    """
+    # Mapping from Qt logging levels to the matching logging module levels.
+    # Note we map critical to ERROR as it's actually "just" an error, and fatal
+    # to critical.
+    qt_to_logging = {
+        QtDebugMsg: logging.DEBUG,
+        QtWarningMsg: logging.WARNING,
+        QtCriticalMsg: logging.ERROR,
+        QtFatalMsg: logging.CRITICAL,
+    }
+    level = qt_to_logging[msg_type]
+    if context.function is None:
+        func = 'none'
+    else:
+        func = context.function
+    if context.category is None or context.category == 'default':
+        name = 'qt'
+    else:
+        name = 'qt-' + context.category
+    logger = logging.getLogger('qt-tests')
+    record = logger.makeRecord(name, level, context.file, context.line, msg,
+                               None, None, func)
+    logger.handle(record)