Make caret unittests run with QtWebKit

tests/helpers/fixtures.py

@@ -154,7 +154,8 @@ def greasemonkey_manager(data_tmpdir):
 
 @pytest.fixture
 def webkit_tab(qtbot, tab_registry, cookiejar_and_cache, mode_manager,
-               session_manager_stub, greasemonkey_manager, fake_args):
+               session_manager_stub, greasemonkey_manager, fake_args,
+               host_blocker_stub):
     webkittab = pytest.importorskip('qutebrowser.browser.webkit.webkittab')
     tab = webkittab.WebKitTab(win_id=0, mode_manager=mode_manager,
                               private=False)

tests/helpers/stubs.py

@@ -475,6 +475,9 @@ class HostBlockerStub:
     def __init__(self):
         self.blocked_hosts = set()
 
+    def is_blocked(self, url):
+        return url in self.blocked_hosts
+
 
 class SessionManagerStub: