Fixes #519, #448, #420, #421 Fix SoapAdapter serializer to support serializing unicode chars

We use string formatter to contruct serialization result.
The template used is str(byte) in python2 even though when the val is
unicode.
This is fine when val only contains ASCII chars since python can encode
them to str implicitly using ASCII encoding. But when the val is
non-ASCII unicodes,
the conversion fails. Fix it by using a unicode template to avoid the
conversion.

Author: Tianhao He

pyVmomi/SoapAdapter.py

@@ -448,7 +448,7 @@ def _Serialize(self, val, info, defNS):
             # a bug.
             val = val.decode(XML_ENCODING)
          result = XmlEscape(val)
-         self.writer.write('<{0}{1}>{2}</{0}>'.format(info.name, attr, result))
+         self.writer.write(u'<{0}{1}>{2}</{0}>'.format(info.name, attr, result))
 
    ## Serialize a a data object (internal)
    #

tests/test_serializer.py

@@ -1,3 +1,5 @@
+# -*- coding: utf-8 -*-
+
 # VMware vSphere Python SDK
 # Copyright (c) 2008-2015 VMware, Inc. All Rights Reserved.
 #
@@ -40,6 +42,14 @@ def test_serialize_float(self):
         pc.diskSpaceToAddressSpaceRatio = 1.0
         SoapAdapter.Serialize(pc, version='vim.version.version10')
 
+    def test_serialize_unicode(self):
+        self.assertEqual(SoapAdapter.SerializeToUnicode('Ḃ'),
+                         u'<object xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:vim25" xsi:type="xsd:string">\u1e02</object>')
+        self.assertEqual(SoapAdapter.SerializeToUnicode(u'Ḃ'),
+                         u'<object xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:vim25" xsi:type="xsd:string">\u1e02</object>')
+        self.assertEqual(SoapAdapter.SerializeToUnicode(u'\u1e02'),
+                         u'<object xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:vim25" xsi:type="xsd:string">\u1e02</object>')
+
     def _base_serialize_test(self, soap_creator, request_matcher):
         my_vcr = config.VCR(
             custom_patches=(
@@ -99,3 +109,4 @@ def soap_creator():
             self._base_serialize_test(soap_creator, request_matcher)
         finally:
             GetRequestContext().pop("vcSessionCookie")
+