Update test to capture the actual expectation on EntryPoints object and remove deprecated usage.

Author: jaraco

tests/test_api.py

@@ -181,8 +181,9 @@ def test_entry_points_groups_get(self):
             entry_points().get('missing', ()) == ()
 
     def test_entry_points_allows_no_attributes(self):
+        ep = entry_points().select(group='entries', name='main')
         with self.assertRaises(AttributeError):
-            entry_points()['entries'][0].foo = 4
+            ep.foo = 4
 
     def test_metadata_for_this_package(self):
         md = metadata('egginfo-pkg')