Update test_codecmaps_cn from v3.14.3

Lib/test/test_codecmaps_cn.py

@@ -0,0 +1,26 @@
+#
+# test_codecmaps_cn.py
+#   Codec mapping tests for PRC encodings
+#
+
+from test import multibytecodec_support
+import unittest
+
+class TestGB2312Map(multibytecodec_support.TestBase_Mapping,
+                   unittest.TestCase):
+    encoding = 'gb2312'
+    mapfileurl = 'http://www.pythontest.net/unicode/EUC-CN.TXT'
+
+class TestGBKMap(multibytecodec_support.TestBase_Mapping,
+                   unittest.TestCase):
+    encoding = 'gbk'
+    mapfileurl = 'http://www.pythontest.net/unicode/CP936.TXT'
+
+class TestGB18030Map(multibytecodec_support.TestBase_Mapping,
+                     unittest.TestCase):
+    encoding = 'gb18030'
+    mapfileurl = 'http://www.pythontest.net/unicode/gb-18030-2000.xml'
+
+
+if __name__ == "__main__":
+    unittest.main()