queryset-refactor: Merged from trunk up to [6595].

git-svn-id: http://code.djangoproject.com/svn/django/branches/queryset-refactor@6597 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/datastructures/tests.py

@@ -54,6 +54,25 @@
 True
 >>> print repr(d)
 {'one': 'not one', 'two': 'two', 'three': 'three'}
+>>> d.pop('one', 'missing')
+'not one'
+>>> d.pop('one', 'missing')
+'missing'
+
+We don't know which item will be popped in popitem(), so we'll just check that
+the number of keys has decreased.
+>>> l = len(d)
+>>> _ = d.popitem()
+>>> l - len(d)
+1
+
+Init from sequence of tuples
+>>> d = SortedDict((
+... (1, "one"),
+... (0, "zero"),
+... (2, "two")))
+>>> print repr(d)
+{1: 'one', 0: 'zero', 2: 'two'}
 
 ### DotExpandedDict ############################################################