Merge #17448: Make test_sax skip if there are no xml parsers.

Patch by Rafael Santos.

Lib/test/test_sax.py

@@ -3,11 +3,12 @@
 
 from xml.sax import make_parser, ContentHandler, \
                     SAXException, SAXReaderNotAvailable, SAXParseException
+import unittest
 try:
     make_parser()
 except SAXReaderNotAvailable:
     # don't try to test this module if we cannot create a parser
-    raise ImportError("no XML parsers available")
+    raise unittest.SkipTest("no XML parsers available")
 from xml.sax.saxutils import XMLGenerator, escape, unescape, quoteattr, \
                              XMLFilterBase
 from xml.sax.expatreader import create_parser
@@ -18,7 +19,6 @@ import os.path
 import shutil
 from test import support
 from test.support import findfile, run_unittest
-import unittest
 
 TEST_XMLFILE = findfile("test.xml", subdir="xmltestdata")
 TEST_XMLFILE_OUT = findfile("test.xml.out", subdir="xmltestdata")

Misc/ACKS

@@ -1050,6 +1050,7 @@ Kevin Samborn
 Adrian Sampson
 James Sanders
 Ilya Sandler
+Rafael Santos
 Mark Sapiro
 Ty Sarna
 Hugh Sasse

Misc/NEWS

@@ -659,6 +659,9 @@ Issue #16880: Do not assume _imp.load_dynamic() is defined in the imp module.
 Tests
 -----
 
+- Issue #17448: test_sax now skips if there are no xml parsers available
+  instead of raising an ImportError.
+
 - Issue #11420: make test suite pass with -B/DONTWRITEBYTECODE set.
   Initial patch by Thomas Wouters.