Found a Py 3.3 problem.

Added basic tests.

3 files changed, 19 insertions, 10 deletions

diff --git a/CHANGES.txt b/CHANGES.txt
index 3ad6816..0e862c9 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -4,7 +4,7 @@ CHANGES
 4.0.1 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Fixed a previously untested Python 3.3 compatibility problem.
 
 
 4.0.0 (2013-02-14)
diff --git a/src/zope/tales/tales.py b/src/zope/tales/tales.py
index 4fbb33f..fd3295e 100644
--- a/src/zope/tales/tales.py
+++ b/src/zope/tales/tales.py
@@ -113,7 +113,7 @@ class Iterator(object):
         else:
             self._done = False
 
-    def next(self):
+    def __next__(self):
         """Advance the iterator, if possible.
 
         >>> context = Context(ExpressionEngine(), {})
@@ -168,6 +168,8 @@ class Iterator(object):
         self._setLocal(self._name, v)
         return True
 
+    next = __next__  # Python 2 compatibility
+
     def index(self):
         """Get the iterator index
 
@@ -701,10 +703,10 @@ class Context(object):
         text = self.evaluate(expr)
         if text is self.getDefault() or text is None:
             return text
-        if isinstance(text, basestring):
+        if isinstance(text, six.string_types):
             # text could already be something text-ish, e.g. a Message object
             return text
-        return unicode(text)
+        return six.text_type(text)
 
     def evaluateStructure(self, expr):
         return self.evaluate(expr)
@@ -730,7 +732,7 @@ class Context(object):
     def translate(self, msgid, domain=None, mapping=None, default=None):
         # custom Context implementations are supposed to customize
         # this to call whichever translation routine they want to use
-        return unicode(msgid)
+        return six.text_type(msgid)
 
 
 class TALESTracebackSupplement(object):
diff --git a/src/zope/tales/tests/test_tales.py b/src/zope/tales/tests/test_tales.py
index 82c03bd..853b19f 100644
--- a/src/zope/tales/tests/test_tales.py
+++ b/src/zope/tales/tests/test_tales.py
@@ -16,6 +16,7 @@
 import unittest
 import re
 
+import six
 from zope.tales import tales
 from zope.tales.tests.simpleexpr import SimpleExpr
 from doctest import DocTestSuite
@@ -28,7 +29,7 @@ class TALESTests(unittest.TestCase):
         # Test sample Iterator class
         context = Harness(self)
         it = tales.Iterator('name', (), context)
-        self.assert_( not it.next(), "Empty iterator")
+        self.assert_( not next(it), "Empty iterator")
         context._complete_()
 
     def testIterator1(self):
@@ -36,7 +37,7 @@ class TALESTests(unittest.TestCase):
         context = Harness(self)
         it = tales.Iterator('name', (1,), context)
         context._assert_('setLocal', 'name', 1)
-        self.assert_( it.next() and not it.next(), "Single-element iterator")
+        self.assert_(next(it) and not next(it), "Single-element iterator")
         context._complete_()
 
     def testIterator2(self):
@@ -46,8 +47,8 @@ class TALESTests(unittest.TestCase):
         for c in 'text':
             context._assert_('setLocal', 'text', c)
         for c in 'text':
-            self.assert_(it.next(), "Multi-element iterator")
-        self.assert_( not it.next(), "Multi-element iterator")
+            self.assert_(next(it), "Multi-element iterator")
+        self.assert_(not next(it), "Multi-element iterator")
         context._complete_()
 
     def testRegisterType(self):
@@ -97,12 +98,18 @@ class TALESTests(unittest.TestCase):
         e.registerType('simple', SimpleExpr)
         return e.getContext(*(), **kws)
 
-    def testContext0(self):
+    def testContext_evaluate(self):
         # Test use of Context
         se = self.getContext().evaluate('simple:x')
         self.assert_( se == ('simple', 'x'), (
             'Improperly evaluated expression %s.' % repr(se)))
 
+    def testContext_evaluateText(self):
+        # Test use of Context
+        se = self.getContext().evaluateText('simple:x')
+        self.assertTrue(isinstance(se, six.text_type))
+        self.assertEqual(se, "('simple', 'x')")
+
     def testVariables(self):
         # Test variables
         ctxt = self.getContext()