Stabilize :session-save --quiet test

By adding a way to check for the loglevel, we can easily check there's no
message but still wait for the session to be saved.

qutebrowser/misc/sessions.py

@@ -519,7 +519,9 @@ class SessionManager(QObject):
             raise cmdexc.CommandError("Error while saving session: {}"
                                       .format(e))
         else:
-            if not quiet:
+            if quiet:
+                log.sessions.debug("Saved session {}.".format(name))
+            else:
                 message.info("Saved session {}.".format(name))
 
     @cmdutils.register(instance='session-manager')

tests/end2end/features/conftest.py

@@ -439,14 +439,21 @@ def expect_message(quteproc, server, category, message):
 
 
 @bdd.then(bdd.parsers.re(r'(?P<is_regex>regex )?"(?P<pattern>[^"]+)" should '
-                         r'be logged'))
-def should_be_logged(quteproc, server, is_regex, pattern):
+                         r'be logged( with level (?P<loglevel>.*))?'))
+def should_be_logged(quteproc, server, is_regex, pattern, loglevel):
     """Expect the given pattern on regex in the log."""
     if is_regex:
         pattern = re.compile(pattern)
     else:
         pattern = pattern.replace('(port)', str(server.port))
-    line = quteproc.wait_for(message=pattern)
+
+    args = {
+        'message': pattern,
+    }
+    if loglevel:
+        args['loglevel'] = getattr(logging, loglevel.upper())
+
+    line = quteproc.wait_for(**args)
     line.expected = True
 
 

tests/end2end/features/sessions.feature

@@ -279,7 +279,7 @@ Feature: Saving and loading sessions
 
   Scenario: Saving session with --quiet
     When I run :session-save --quiet quiet_session
-    Then "Saved session quiet_session." should not be logged
+    Then "Saved session quiet_session." should be logged with level debug
     And the session quiet_session should exist
 
   Scenario: Saving session with --only-active-window