Avoid configdata init in test_configinit

See #2777

tests/unit/config/test_configinit.py

@@ -26,7 +26,8 @@ import unittest.mock
 import pytest
 
 from qutebrowser import qutebrowser
-from qutebrowser.config import config, configexc, configfiles, configinit
+from qutebrowser.config import (config, configexc, configfiles, configinit,
+                                configdata)
 from qutebrowser.utils import objreg, usertypes
 
 
@@ -52,6 +53,14 @@ def args(fake_args):
     return fake_args
 
 
+@pytest.fixture(autouse=True)
+def configdata_init(monkeypatch):
+    """Make sure configdata is init'ed and no test re-init's it."""
+    if not configdata.DATA:
+        configdata.init()
+    monkeypatch.setattr(configdata, 'init', lambda: None)
+
+
 class TestEarlyInit:
 
     @pytest.mark.parametrize('config_py', [True, 'error', False])