Implemented support for namedtuples (fixes #107)

Note that namedtuples are only supported for Python >2.6.

test/test_integration_stdlib.py

@@ -0,0 +1,37 @@
+"""
+Tests of various stdlib related things that could not be tested
+with "Black Box Tests".
+"""
+import pytest
+from jedi import Script
+from jedi._compatibility import is_py26
+
+
+@pytest.mark.parametrize(['letter', 'expected'], [
+    ('n', ['name']),
+    ('s', ['smart']),
+])
+def test_namedtuple_str(letter, expected):
+    source = "import collections\n" + \
+             "Person = collections.namedtuple('Person', 'name smart')\n" + \
+             "dave = Person('Dave', False)\n" + \
+             "dave.%s" % letter
+    result = Script(source).completions()
+    completions = set(r.name for r in result)
+    if is_py26:
+        assert completions == set()
+    else:
+        assert completions == set(expected)
+
+
+def test_namedtuple_list():
+    source = "import collections\n" + \
+             "Cat = collections.namedtuple('Person', ['legs', u'length', 'large'])\n" + \
+             "garfield = Cat(4, '85cm', True)\n" + \
+             "garfield.l"
+    result = Script(source).completions()
+    completions = set(r.name for r in result)
+    if is_py26:
+        assert completions == set()
+    else:
+        assert completions == set(['legs', 'length', 'large'])