Add python 3.13 betas to test configs

.github/workflows/test.yml

@@ -51,8 +51,11 @@ jobs:
             tox_env: py311-full
           - python: '3.11.0'
             tox_env: py311-full
-          - python: '3.12.0-beta.3 - 3.12'
+          - python: '3.12.0'
             tox_env: py312-full
+          - python: '3.13.0-beta.1 - 3.13'
+            # Some optional dependencies don't seem to work on 3.13 yet
+            tox_env: py313
           - python: 'pypy-3.8'
             # Pypy is a lot slower due to jit warmup costs, so don't run the
             # "full" test config there.

setup.py

@@ -116,6 +116,7 @@ def get_tag(self):
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ],

tornado/test/process_test.py

@@ -9,7 +9,6 @@
 
 from tornado.httpclient import HTTPClient, HTTPError
 from tornado.httpserver import HTTPServer
-from tornado.ioloop import IOLoop
 from tornado.log import gen_log
 from tornado.process import fork_processes, task_id, Subprocess
 from tornado.simple_httpclient import SimpleAsyncHTTPClient
@@ -141,20 +140,19 @@ def term_and_wait(self, subproc):
 
     @gen_test
     def test_subprocess(self):
-        if IOLoop.configured_class().__name__.endswith("LayeredTwistedIOLoop"):
-            # This test fails non-deterministically with LayeredTwistedIOLoop.
-            # (the read_until('\n') returns '\n' instead of 'hello\n')
-            # This probably indicates a problem with either TornadoReactor
-            # or TwistedIOLoop, but I haven't been able to track it down
-            # and for now this is just causing spurious travis-ci failures.
-            raise unittest.SkipTest(
-                "Subprocess tests not compatible with " "LayeredTwistedIOLoop"
-            )
+        # In Python 3.13.0b1, the new repl logs an error on exit if terminfo
+        # doesn't exist, the -i flag is used, and stdin is not a tty. This bug may
+        # have been fixed in beta 2, so for now we disable the new repl in this test
+        # and the next. Once we've tested with beta 2 we can either remove this env var
+        # or file a bug upstream if it still exists.
+        env = dict(os.environ)
+        env["PYTHON_BASIC_REPL"] = "1"
         subproc = Subprocess(
             [sys.executable, "-u", "-i"],
             stdin=Subprocess.STREAM,
             stdout=Subprocess.STREAM,
             stderr=subprocess.STDOUT,
+            env=env,
         )
         self.addCleanup(lambda: self.term_and_wait(subproc))
         self.addCleanup(subproc.stdout.close)
@@ -172,11 +170,14 @@ def test_subprocess(self):
     @gen_test
     def test_close_stdin(self):
         # Close the parent's stdin handle and see that the child recognizes it.
+        env = dict(os.environ)
+        env["PYTHON_BASIC_REPL"] = "1"
         subproc = Subprocess(
             [sys.executable, "-u", "-i"],
             stdin=Subprocess.STREAM,
             stdout=Subprocess.STREAM,
             stderr=subprocess.STDOUT,
+            env=env,
         )
         self.addCleanup(lambda: self.term_and_wait(subproc))
         yield subproc.stdout.read_until(b">>> ")

tornado/test/util_test.py

@@ -14,7 +14,6 @@
     timedelta_to_seconds,
     import_object,
     re_unescape,
-    is_finalizing,
 )
 
 import typing
@@ -301,8 +300,3 @@ def test_re_unescape_raises_error_on_invalid_input(self):
             re_unescape("\\b")
         with self.assertRaises(ValueError):
             re_unescape("\\Z")
-
-
-class IsFinalizingTest(unittest.TestCase):
-    def test_basic(self):
-        self.assertFalse(is_finalizing())

tornado/util.py

@@ -12,7 +12,6 @@
 
 import array
 import asyncio
-import atexit
 from inspect import getfullargspec
 import os
 import re
@@ -47,22 +46,6 @@
 unicode_type = str
 basestring_type = str
 
-try:
-    from sys import is_finalizing
-except ImportError:
-    # Emulate it
-    def _get_emulated_is_finalizing() -> Callable[[], bool]:
-        L = []  # type: List[None]
-        atexit.register(lambda: L.append(None))
-
-        def is_finalizing() -> bool:
-            # Not referencing any globals here
-            return L != []
-
-        return is_finalizing
-
-    is_finalizing = _get_emulated_is_finalizing()
-
 
 # versionchanged:: 6.2
 # no longer our own TimeoutError, use standard asyncio class

tox.ini

@@ -13,7 +13,7 @@
 [tox]
 envlist =
         # Basic configurations: Run the tests for each python version.
-        py38-full,py39-full,py310-full,py311-full,pypy3-full
+        py38-full,py39-full,py310-full,py311-full,py312-full,pypy3-full
 
         # Build and test the docs with sphinx.
         docs
@@ -29,6 +29,7 @@ basepython =
            py310: python3.10
            py311: python3.11
            py312: python3.12
+           py313: python3.13
            pypy3: pypy3
            # In theory, it doesn't matter which python version is used here.
            # In practice, things like changes to the ast module can alter
@@ -48,7 +49,7 @@ deps =
 
 setenv =
        # Treat the extension as mandatory in testing (but not on pypy)
-       {py3,py38,py39,py310,py311,py312}: TORNADO_EXTENSION=1
+       {py3,py38,py39,py310,py311,py312,py313}: TORNADO_EXTENSION=1
        # CI workers are often overloaded and can cause our tests to exceed
        # the default timeout of 5s.
        ASYNC_TEST_TIMEOUT=25
@@ -60,7 +61,7 @@ setenv =
        # during sdist installation (and it doesn't seem to be
        # possible to set environment variables during that phase of
        # tox).
-       {py3,py38,py39,py310,py311,pypy3}: PYTHONWARNINGS=error:::tornado
+       {py3,py38,py39,py310,py311,py312,py313,pypy3}: PYTHONWARNINGS=error:::tornado
        # Warn if we try to open a file with an unspecified encoding.
        # (New in python 3.10, becomes obsolete when utf8 becomes the
        # default in 3.15)
@@ -117,5 +118,5 @@ commands =
          # something new than of depending on something old and deprecated.
          # But sometimes something we depend on gets removed so we should also
          # test the newest version.
-         mypy --platform linux --python-version 3.12 {posargs:tornado}
+         mypy --platform linux --python-version 3.13 {posargs:tornado}
 changedir = {toxinidir}