Issue #17606: Fixed support of encoded byte strings in the XMLGenerator
characters() and ignorableWhitespace() methods.  Original patch by Sebastian
Ortiz Vasquez.
diff --git a/Lib/test/test_sax.py b/Lib/test/test_sax.py
index 3a20eac..86638a2 100644
--- a/Lib/test/test_sax.py
+++ b/Lib/test/test_sax.py
@@ -284,6 +284,26 @@
 
         self.assertEqual(result.getvalue(), start + "<doc> </doc>")
 
+    def test_xmlgen_encoding_bytes(self):
+        encodings = ('iso-8859-15', 'utf-8',
+                     'utf-16be', 'utf-16le',
+                     'utf-32be', 'utf-32le')
+        for encoding in encodings:
+            result = self.ioclass()
+            gen = XMLGenerator(result, encoding=encoding)
+
+            gen.startDocument()
+            gen.startElement("doc", {"a": u'\u20ac'})
+            gen.characters(u"\u20ac".encode(encoding))
+            gen.ignorableWhitespace(" ".encode(encoding))
+            gen.endElement("doc")
+            gen.endDocument()
+
+            self.assertEqual(result.getvalue(), (
+                u'<?xml version="1.0" encoding="%s"?>\n'
+                u'<doc a="\u20ac">\u20ac </doc>' % encoding
+                ).encode(encoding, 'xmlcharrefreplace'))
+
     def test_xmlgen_ns(self):
         result = self.ioclass()
         gen = XMLGenerator(result)