unittest: fix quadratic behavior in collection of unittests using setUpClass/setup_method

This is similar to 50114d4731876dae; I missed that unittest does the
same thing.

1 files changed, 13 insertions, 0 deletions

diff --git a/bench/unit_test.py b/bench/unit_test.py
new file mode 100644
index 000000000..ad52069db
--- /dev/null
+++ b/bench/unit_test.py
@@ -0,0 +1,13 @@
+from unittest import TestCase  # noqa: F401
+
+for i in range(15000):
+    exec(
+        f"""
+class Test{i}(TestCase):
+    @classmethod
+    def setUpClass(cls): pass
+    def test_1(self): pass
+    def test_2(self): pass
+    def test_3(self): pass
+"""
+    )