Compact int and float freelists

Lib/test/test_sys.py

 # -*- coding: iso-8859-1 -*-
 import unittest, test.test_support
 import sys, cStringIO
 
 class SysModuleTest(unittest.TestCase):
 
     def test_original_displayhook(self):
         import __builtin__
         savestdout = sys.stdout
         out = cStringIO.StringIO()
@@ skipping 345 matching lines @@
         self.failUnless(sys.flags)
         attrs = ("debug", "py3k_warning", "division_warning", "division_new",
                  "inspect", "interactive", "optimize", "dont_write_bytecode",
                  "no_site", "ignore_environment", "tabcheck", "verbose",
                  "unicode")
         for attr in attrs:
             self.assert_(hasattr(sys.flags, attr), attr)
             self.assertEqual(type(getattr(sys.flags, attr)), int, attr)
         self.assert_(repr(sys.flags))
 
+    def test_clear_type_cache(self):
+        sys.clear_type_cache()
+
+    def test_compact_freelists(self):
+        sys.compact_freelists()
+        r = sys.compact_freelists()
+        # freed blocks shouldn't change
+        self.assertEqual(r[0][2], 0)
+        self.assertEqual(r[1][2], 0)
+        # fill freelists
+        ints = list(range(12000))
+        floats = [float(i) for i in ints]
+        del ints
+        del floats
+        # should free more than 200 blocks each
+        r = sys.compact_freelists()
+        self.assert_(r[0][2] > 200, r[0][2])
+        self.assert_(r[1][2] > 200, r[1][2])
 
 def test_main():
     test.test_support.run_unittest(SysModuleTest)
 
 if __name__ == "__main__":
     test_main()