Unit test config option completion.

Had to add the `raw` parameter to ConfigStub.get as the setting option
completion model passes this argument explicitly (although the docs say
only raw=True is supported).

tests/helpers/stubs.py

@@ -398,7 +398,7 @@ class ConfigStub(QObject):
         """
         return self.data[name]
 
-    def get(self, sect, opt):
+    def get(self, sect, opt, raw=True):
         """Get a value from the config."""
         data = self.data[sect]
         try:

tests/unit/completion/test_models.py

@@ -215,6 +215,22 @@ def test_setting_section_completion(monkeypatch, stubs):
     ]
 
 
+def test_setting_option_completion(monkeypatch, stubs, config_stub):
+    module = 'qutebrowser.completion.models.configmodel'
+    _patch_configdata(monkeypatch, stubs, module + '.configdata.DATA')
+    config_stub.data = {'ui': {'gesture': 'off',
+                                'mind': 'on',
+                                'voice': 'sometimes'}}
+    actual = _get_completions(configmodel.SettingOptionCompletionModel('ui'))
+    assert actual == [
+        ("ui", [
+            ('gesture', 'Waggle your hands to control qutebrowser', 'off'),
+            ('mind', 'Enable mind-control ui (experimental)', 'on'),
+            ('voice', 'Whether to respond to voice commands', 'sometimes'),
+        ])
+    ]
+
+
 def _get_completions(model):
     """Collect all the completion entries of a model, organized by category.