test: Test with 3.13, PyPy 3.9, and no lxml

- Add tox configuration for Python 3.13 and PyPy 3.9
- Add tox env for testing with and without lxml installed
- Fixed tests when lxml is missing

Signed-off-by: Christian Heimes <[email protected]>

.github/workflows/main.yml

@@ -34,6 +34,8 @@ jobs:
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13-dev"
+          - "pypy3.9"
         image: 
           - "ubuntu-22.04"
         include:

tests.py

@@ -351,22 +351,22 @@ def test_exceptions(self):
 class TestDefusedLxml(BaseTests):
     module = lxml
 
-    cyclic_error = lxml_etree.XMLSyntaxError
+    cyclic_error = getattr(lxml_etree, "XMLSyntaxError", None)
 
     content_binary = True
 
     def parse(self, xmlfile, **kwargs):
         try:
             tree = self.module.parse(xmlfile, **kwargs)
         except lxml_etree.XMLSyntaxError:
-            self.skipTest("lxml detects entityt reference loop")
+            self.skipTest("lxml detects entity reference loop")
         return self.module.tostring(tree)
 
     def parseString(self, xmlstring, **kwargs):
         try:
             tree = self.module.fromstring(xmlstring, **kwargs)
         except lxml_etree.XMLSyntaxError:
-            self.skipTest("lxml detects entityt reference loop")
+            self.skipTest("lxml detects entity reference loop")
         return self.module.tostring(tree)
 
     if not LXML3:

tox.ini

@@ -1,12 +1,12 @@
 [tox]
-envlist = py36,py37,py38,py39,py310,py311,py312,black,pep8py3,doc
+envlist = {py36,py37,py38,py39,py310,py311,py312}-{lxml,nolxml},py313,pypy39,black,pep8py3,doc
 skip_missing_interpreters = true
 
 [testenv]
 commands =
     {envpython} {toxinidir}/tests.py
 deps =
-    lxml
+    lxml: lxml
 
 [testenv:black]
 commands = black --check --verbose \
@@ -48,3 +48,5 @@ python =
     3.10: py310
     3.11: py311
     3.12: py312
+    3.13: py313
+    pypy-3.9: pypy39