dev-python/tornado: Add a pytest-8.2 fix (for revdeps)

Signed-off-by: Michał Górny <mgorny@gentoo.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/dev-python/tornado/files/tornado-6.4-pytest-8.2.patch b/dev-python/tornado/files/tornado-6.4-pytest-8.2.patch
new file mode 100644
index 000000000000..21a2ed04d24a
--- /dev/null
+++ b/dev-python/tornado/files/tornado-6.4-pytest-8.2.patch
@@ -0,0 +1,66 @@
+From c851aa8a949524b35f72c82b45a52353aa3c0558 Mon Sep 17 00:00:00 2001
+From: Ran Benita <ran@unusedvar.com>
+Date: Sun, 28 Apr 2024 14:17:54 +0300
+Subject: [PATCH] testing: allow to instantiate an empty AsyncTestCase
+
+`unittest.TestCase` has a feature where it allows instantiating
+`MyTestClass()` with the default method name `runTest` even if a
+`runTest` method doesn't actually exist. This is documented in
+`TestCase`'s docs under "Changed in version 3.2"[0].
+
+Since version 8.2, pytest relies on this, and started breaking on
+Tornado's `AsyncTestCase`[1].
+
+Change `AsyncTestCase` to allow empty instatiation, by matching the
+upstream code.
+
+[0] https://docs.python.org/3/library/unittest.html#unittest.TestCase
+[1] https://github.com/pytest-dev/pytest/issues/12263
+---
+ tornado/test/testing_test.py |  9 +++++++++
+ tornado/testing.py           | 12 +++++++++++-
+ 2 files changed, 20 insertions(+), 1 deletion(-)
+
+diff --git a/tornado/test/testing_test.py b/tornado/test/testing_test.py
+index 0429feee83..8e2b8db428 100644
+--- a/tornado/test/testing_test.py
++++ b/tornado/test/testing_test.py
+@@ -61,6 +61,15 @@ def test_subsequent_wait_calls(self):
+         self.io_loop.add_timeout(self.io_loop.time() + 0.2, self.stop)
+         self.wait(timeout=0.4)
+ 
++    def test_empty_instantation_is_allowed(self):
++        """
++        Test that empty instatiation of an AsyncTestCase is allowed.
++
++        unittest.TestCase docs guarantee this working, and pytest's unittest
++        support relies on it.
++        """
++        AsyncTestCaseTest()
++
+ 
+ class LeakTest(AsyncTestCase):
+     def tearDown(self):
+diff --git a/tornado/testing.py b/tornado/testing.py
+index bdbff87bc3..9455411a6d 100644
+--- a/tornado/testing.py
++++ b/tornado/testing.py
+@@ -177,7 +177,17 @@ def __init__(self, methodName: str = "runTest") -> None:
+         # the test will silently be ignored because nothing will consume
+         # the generator.  Replace the test method with a wrapper that will
+         # make sure it's not an undecorated generator.
+-        setattr(self, methodName, _TestMethodWrapper(getattr(self, methodName)))
++        try:
++            test_method = getattr(self, methodName)
++        except AttributeError:
++            if methodName != "runTest":
++                # We allow instantiation with no explicit method name
++                # but not an *incorrect* or missing method name.
++                raise ValueError(
++                    "no such test method in %s: %s" % (self.__class__, methodName)
++                )
++        else:
++            setattr(self, methodName, _TestMethodWrapper(test_method))
+ 
+         # Not used in this class itself, but used by @gen_test
+         self._test_generator = None  # type: Optional[Union[Generator, Coroutine]]