Not transform to str on potential unicode fields

some fields such as instance.display_name can be unicode,
nova client should not translate it to 'str'. otherwise
it will report UnicodeEncodeError.

Change-Id: I4f6011105b3b11dbbcb23f3a7c1bbcf7f20bcc8c
Closes-Bug: 1518141

novaclient/tests/unit/test_utils.py

@@ -14,6 +14,7 @@
 import sys
 
 import mock
+from oslo_utils import encodeutils
 import six
 
 from novaclient import base
@@ -215,6 +216,21 @@ class PrintResultTestCase(test_utils.TestCase):
                          '+------+-------+\n',
                          sys.stdout.getvalue())
 
+    @mock.patch('sys.stdout', six.StringIO())
+    def test_print_unicode_list(self):
+        objs = [_FakeResult("k", u'\u2026')]
+        utils.print_list(objs, ["Name", "Value"])
+        if six.PY3:
+            s = u'\u2026'
+        else:
+            s = encodeutils.safe_encode(u'\u2026')
+        self.assertEqual('+------+-------+\n'
+                         '| Name | Value |\n'
+                         '+------+-------+\n'
+                         '| k    | %s     |\n'
+                         '+------+-------+\n' % s,
+                         sys.stdout.getvalue())
+
     # without sorting
     @mock.patch('sys.stdout', six.StringIO())
     def test_print_list_sort_by_none(self):
@@ -280,6 +296,21 @@ class PrintResultTestCase(test_utils.TestCase):
             '+----------+------------------------------------------+\n',
             sys.stdout.getvalue())
 
+    @mock.patch('sys.stdout', six.StringIO())
+    def test_print_unicode_dict(self):
+        dict = {'k': u'\u2026'}
+        utils.print_dict(dict)
+        if six.PY3:
+            s = u'\u2026'
+        else:
+            s = encodeutils.safe_encode(u'\u2026')
+        self.assertEqual('+----------+-------+\n'
+                         '| Property | Value |\n'
+                         '+----------+-------+\n'
+                         '| k        | %s     |\n'
+                         '+----------+-------+\n' % s,
+                         sys.stdout.getvalue())
+
 
 class FlattenTestCase(test_utils.TestCase):
     def test_flattening(self):

novaclient/utils.py

@@ -98,7 +98,7 @@ def print_list(objs, fields, formatters={}, sortby_index=None):
                 if data is None:
                     data = '-'
                 # '\r' would break the table, so remove it.
-                data = str(data).replace("\r", "")
+                data = six.text_type(data).replace("\r", "")
                 row.append(data)
         pt.add_row(row)
 
@@ -162,7 +162,7 @@ def print_dict(d, dict_property="Property", dict_value="Value", wrap=0):
         if isinstance(v, (dict, list)):
             v = jsonutils.dumps(v)
         if wrap > 0:
-            v = textwrap.fill(str(v), wrap)
+            v = textwrap.fill(six.text_type(v), wrap)
         # if value has a newline, add in multiple rows
         # e.g. fault with stacktrace
         if v and isinstance(v, six.string_types) and (r'\n' in v or '\r' in v):