Fixed #25170 -- Made assertXMLEqual()/assertXMLNotEqual() ignore leading and trailing whitespace.

Thanks Jacek Bzdak for indepdently contributing a similar fix.

AUTHORS

@@ -234,6 +234,7 @@ answer newbie questions, and generally made Django that much better:
     Fabrice Aneche <akh@nobugware.com>
     favo@exoweb.net
     fdr <drfarina@gmail.com>
+    Federico Capoano <nemesis@ninux.org>
     Filip Noetzel <http://filip.noetzel.co.uk/>
     Filip Wasilewski <filip.wasilewski@gmail.com>
     Finn Gruwier Larsen <finn@gruwier.dk>
@@ -483,6 +484,7 @@ answer newbie questions, and generally made Django that much better:
     Matt McClanahan <http://mmcc.cx/>
     Matt Riggott
     Matt Robenolt <m@robenolt.com>
+    Mattia Larentis <mattia@laretis.eu>
     mattycakes@gmail.com
     Max Burstein <http://maxburstein.com>
     Max Derkachev <mderk@yandex.ru>

django/test/utils.py

@@ -293,7 +293,7 @@ def compare_xml(want, got):
     """Tries to do a 'xml-comparison' of want and got.  Plain string
     comparison doesn't always work because, for example, attribute
     ordering should not be important. Comment nodes are not considered in the
-    comparison.
+    comparison. Leading and trailing whitespace is ignored on both chunks.
 
     Based on http://codespeak.net/svn/lxml/trunk/src/lxml/doctestcompare.py
     """
@@ -338,8 +338,8 @@ def compare_xml(want, got):
                 return node
 
     want, got = strip_quotes(want, got)
-    want = want.replace('\\n', '\n')
-    got = got.replace('\\n', '\n')
+    want = want.strip().replace('\\n', '\n')
+    got = got.strip().replace('\\n', '\n')
 
     # If the string is not a complete xml document, we may need to add a
     # root element. This allow us to compare fragments, like "<foo/><bar/>"

tests/test_utils/tests.py

@@ -753,6 +753,16 @@ class XMLEqualTests(SimpleTestCase):
         xml2 = "<?xml version='1.0'?><!-- comment2 --><elem attr2='b' attr1='a' />"
         self.assertXMLEqual(xml1, xml2)
 
+    def test_simple_equal_with_leading_or_trailing_whitespace(self):
+        xml1 = "<elem>foo</elem> \t\n"
+        xml2 = " \t\n<elem>foo</elem>"
+        self.assertXMLEqual(xml1, xml2)
+
+    def test_simple_not_equal_with_whitespace_in_the_middle(self):
+        xml1 = "<elem>foo</elem><elem>bar</elem>"
+        xml2 = "<elem>foo</elem> <elem>bar</elem>"
+        self.assertXMLNotEqual(xml1, xml2)
+
 
 class SkippingExtraTests(TestCase):
     fixtures = ['should_not_be_loaded.json']