Move list and tuple tests from test_types.py to their own scripts:

test_tuple.py and test_list.py. Common tests for tuple, list and UserList
are shared (in seq_tests.py and list_tests.py). Port tests to PyUnit.
(From SF patch #736962)

Lib/test/test_tuple.py

@@ -0,0 +1,49 @@
+import unittest
+from test import test_support, seq_tests
+
+class TupleTest(seq_tests.CommonTest):
+    type2test = tuple
+
+    def test_constructors(self):
+        super(TupleTest, self).test_len()
+        # calling built-in types without argument must return empty
+        self.assertEqual(tuple(), ())
+
+    def test_truth(self):
+        super(TupleTest, self).test_truth()
+        self.assert_(not ())
+        self.assert_((42, ))
+
+    def test_len(self):
+        super(TupleTest, self).test_len()
+        self.assertEqual(len(()), 0)
+        self.assertEqual(len((0,)), 1)
+        self.assertEqual(len((0, 1, 2)), 3)
+
+    def test_iadd(self):
+        super(TupleTest, self).test_iadd()
+        u = (0, 1)
+        u2 = u
+        u += (2, 3)
+        self.assert_(u is not u2)
+
+    def test_imul(self):
+        super(TupleTest, self).test_imul()
+        u = (0, 1)
+        u2 = u
+        u *= 3
+        self.assert_(u is not u2)
+
+    def test_tupleresizebug(self):
+        # Check that a specific bug in _PyTuple_Resize() is squashed.
+        def f():
+            for i in range(1000):
+                yield i
+        self.assertEqual(list(tuple(f())), range(1000))
+
+
+def test_main():
+    test_support.run_unittest(TupleTest)
+
+if __name__=="__main__":
+    test_main()