Fixed #25191 -- Added string diff to SimpleTestCase.assertXMLEqual() message.

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/test_utils/tests.py b/tests/test_utils/tests.py
index d61d797173..6869f49666 100644
--- a/tests/test_utils/tests.py
+++ b/tests/test_utils/tests.py
@@ -710,6 +710,19 @@ class XMLEqualTests(SimpleTestCase):
         with self.assertRaises(AssertionError):
             self.assertXMLEqual(xml1, xml2)
 
+    def test_simple_equal_raises_message(self):
+        xml1 = "<elem attr1='a' />"
+        xml2 = "<elem attr2='b' attr1='a' />"
+
+        msg = '''{xml1} != {xml2}
+- <elem attr1='a' />
++ <elem attr2='b' attr1='a' />
+?      ++++++++++
+'''.format(xml1=repr(xml1), xml2=repr(xml2))
+
+        with self.assertRaisesMessage(AssertionError, msg):
+            self.assertXMLEqual(xml1, xml2)
+
     def test_simple_not_equal(self):
         xml1 = "<elem attr1='a' attr2='c' />"
         xml2 = "<elem attr1='a' attr2='b' />"