python-signedjson fails to build with Python 3.11.0a2.

======================================================================
ERROR: test_decode (tests.test_key.DecodeTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/signedjson-1.1.1/tests/test_key.py", line 38, in test_decode
    self.assertEquals(decoded_key.alg, "ed25519")
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'DecodeTestCase' object has no attribute 'assertEquals'

======================================================================
ERROR: test_decode_verify_key (tests.test_key.DecodeTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/signedjson-1.1.1/tests/test_key.py", line 57, in test_decode_verify_key
    self.assertEquals(decoded_key.alg, "ed25519")
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'DecodeTestCase' object has no attribute 'assertEquals'

======================================================================
ERROR: test_read_keys (tests.test_key.DecodeTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/signedjson-1.1.1/tests/test_key.py", line 75, in test_read_keys
    self.assertEquals(len(keys), 1)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'DecodeTestCase' object has no attribute 'assertEquals'

======================================================================
ERROR: test_read_old_keys (tests.test_key.DecodeTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/signedjson-1.1.1/tests/test_key.py", line 80, in test_read_old_keys
    self.assertEquals(len(keys), 1)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'DecodeTestCase' object has no attribute 'assertEquals'

======================================================================
ERROR: test_generate_key (tests.test_key.GenerateTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/signedjson-1.1.1/tests/test_key.py", line 22, in test_generate_key
    self.assertEquals(my_key.alg, "ed25519")
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'GenerateTestCase' object has no attribute 'assertEquals'

======================================================================
ERROR: test_sign_minimal (tests.test_known_key.KnownKeyTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/signedjson-1.1.1/tests/test_known_key.py", line 44, in test_sign_minimal
    self.assertEquals(
    ^^^^^^^^^^^^^^^^^^
AttributeError: 'KnownKeyTestCase' object has no attribute 'assertEquals'

======================================================================
ERROR: test_sign_with_data (tests.test_known_key.KnownKeyTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/signedjson-1.1.1/tests/test_known_key.py", line 57, in test_sign_with_data
    self.assertEquals(
    ^^^^^^^^^^^^^^^^^^
AttributeError: 'KnownKeyTestCase' object has no attribute 'assertEquals'

----------------------------------------------------------------------
Ran 23 tests in 0.042s

FAILED (errors=7)

Removed many old deprecated unittest features:
    TestCase method aliases failUnlessEqual, failIfEqual, failUnless, failIf, failUnlessRaises, failUnlessAlmostEqual, failIfAlmostEqual (deprecated in Python 3.1), assertEquals, assertNotEquals, assert_, assertAlmostEquals, assertNotAlmostEquals, assertRegexpMatches, assertRaisesRegexp (deprecated in Python 3.2), and assertNotRegexpMatches (deprecated in Python 3.5).
    Undocumented and broken TestCase method assertDictContainsSubset (deprecated in Python 3.2).
    Undocumented <unittest.TestLoader.loadTestsFromModule> TestLoader.loadTestsFromModule() parameter use_load_tests (deprecated and ignored since Python 3.2).
    An alias of the TextTestResult class: _TextTestResult (deprecated in Python 3.2).

(Contributed by Serhiy Storchaka in bpo-45162.)

https://bugs.python.org/issue45162
https://docs.python.org/3.11/whatsnew/3.11.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.11/fedora-rawhide-x86_64/02990074-python-signedjson/

For all our attempts to build python-signedjson with Python 3.11, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/package/python-signedjson/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.11:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/

Let us know here if you have any questions.

Python 3.11 is planned to be included in Fedora 37. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.11.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.