Add CJK codecs support as discussed on python-dev. (SF #873597)

Several style fixes are suggested by Martin v. Loewis and
Marc-Andre Lemburg. Thanks!

Lib/test/test_codecmaps_kr.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+#
+# test_codecmaps_kr.py
+#   Codec mapping tests for ROK encodings
+#
+# $CJKCodecs: test_codecmaps_kr.py,v 1.2 2004/01/17 12:47:19 perky Exp $
+
+from test import test_support
+from test import test_multibytecodec_support
+import unittest
+
+class TestCP949Map(test_multibytecodec_support.TestBase_Mapping,
+                   unittest.TestCase):
+    encoding = 'cp949'
+    mapfilename = 'CP949.TXT'
+    mapfileurl = 'http://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT' \
+                 '/WINDOWS/CP949.TXT'
+
+
+class TestEUCKRMap(test_multibytecodec_support.TestBase_Mapping,
+                   unittest.TestCase):
+    encoding = 'euc_kr'
+    mapfilename = 'EUC-KR.TXT'
+    mapfileurl = 'http://people.freebsd.org/~perky/i18n/EUC-KR.TXT'
+
+
+class TestJOHABMap(test_multibytecodec_support.TestBase_Mapping,
+                   unittest.TestCase):
+    encoding = 'johab'
+    mapfilename = 'JOHAB.TXT'
+    mapfileurl = 'http://www.unicode.org/Public/MAPPINGS/OBSOLETE/EASTASIA/' \
+                 'KSC/JOHAB.TXT'
+    # KS X 1001 standard assigned 0x5c as WON SIGN.
+    # but, in early 90s that is the only era used johab widely,
+    # the most softwares implements it as REVERSE SOLIDUS.
+    # So, we ignore the standard here.
+    pass_enctest = [('\\', u'\u20a9')]
+    pass_dectest = [('\\', u'\u20a9')]
+
+def test_main():
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(TestCP949Map))
+    suite.addTest(unittest.makeSuite(TestEUCKRMap))
+    suite.addTest(unittest.makeSuite(TestJOHABMap))
+    test_support.run_suite(suite)
+
+test_multibytecodec_support.register_skip_expected(TestCP949Map,
+    TestEUCKRMap, TestJOHABMap)
+if __name__ == "__main__":
+    test_main()
+