Added tests for dict.clear(), dict.update(), dict.copy().
diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
index 51c76dc..eedf65a 100644
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -180,3 +180,12 @@
if d['c'] <> 3 or d['a'] <> 4: raise TestFailed, 'dict item assignment'
del d['b']
if d <> {'a': 4, 'c': 3}: raise TestFailed, 'dict item deletion'
+d = {1:1, 2:2, 3:3}
+d.clear()
+if d != {}: raise TestFailed, 'dict clear'
+d.update({1:100})
+d.update({2:20})
+d.update({1:1, 2:2, 3:3})
+if d != {1:1, 2:2, 3:3}: raise TestFailed, 'dict update'
+if d.copy() != {1:1, 2:2, 3:3}: raise TestFailed, 'dict copy'
+if {}.copy() != {}: raise TestFailed, 'empty dict copy'