Define some magic methods for usertypes

qutebrowser/test/utils/usertypes/test_fakedict.py

@@ -40,6 +40,9 @@ class FakeDictTests(TestCase):
         with self.assertRaises(TypeError):
             self.fd["eggs"] = "bar"
 
+    def test_repr(self):
+        self.assertEqual(repr(self.fd), "FakeDict('foo')")
+
 
 if __name__ == '__main__':
     unittest.main()

qutebrowser/test/utils/usertypes/test_neighborlist.py

@@ -37,6 +37,19 @@ class InitTests(TestCase):
         nl = NeighborList([1, 2, 3])
         self.assertEqual(nl.items, [1, 2, 3])
 
+    def test_len(self):
+        nl = NeighborList([1, 2, 3])
+        self.assertEqual(len(nl), 3)
+
+    def test_repr(self):
+        nl = NeighborList([1, 2, 3])
+        self.assertEqual(repr(nl), 'NeighborList([1, 2, 3])')
+
+    def test_contains(self):
+        nl = NeighborList([1, 2, 3])
+        self.assertIn(2, nl)
+        self.assertNotIn(4, nl)
+
 
 class DefaultTests(TestCase):
 

qutebrowser/utils/usertypes.py

@@ -23,6 +23,7 @@ Module attributes:
 
 import operator
 import logging
+import collections.abc
 
 _UNSET = object()
 
@@ -55,7 +56,7 @@ class EnumBase(type):
         return cls._mapping[key]
 
 
-class NeighborList:
+class NeighborList(collections.abc.Sequence):
 
     """A list of items which saves it current position.
 
@@ -94,6 +95,15 @@ class NeighborList:
         self._mode = mode
         self.fuzzyval = None
 
+    def __getitem__(self, key):
+        return self._items[key]
+
+    def __len__(self):
+        return len(self._items)
+
+    def __repr__(self):
+        return '{}({})'.format(self.__class__.__name__, self._items)
+
     def _snap_in(self, offset):
         """Set the current item to the closest item to self.fuzzyval.
 
@@ -208,3 +218,6 @@ class FakeDict:
 
     def __getitem__(self, _key):
         return self._val
+
+    def __repr__(self):
+        return "FakeDict('{}')".format(self._val)