mit neuen venv und exe-Files

venv3_12/Lib/site-packages/gevent/tests/test__issue1864.py

@@ -0,0 +1,28 @@
+import sys
+import unittest
+from gevent import testing as greentest
+
+
+class TestSubnormalFloatsAreNotDisabled(unittest.TestCase):
+
+    @greentest.skipOnCI('Some of our tests we compile with -Ofast, which breaks this.')
+    def test_subnormal_is_not_zero(self):
+        # Enabling the -Ofast compiler flag resulted in subnormal floats getting
+        # disabled the moment when gevent was imported. This impacted libraries
+        # that expect subnormal floats to be enabled.
+        #
+        # NOTE: This test is supposed to catch that. It doesn't seem to work perfectly, though.
+        # The test passes under Python 2 on macOS no matter whether -ffast-math is given or not;
+        # perhaps this is a difference in clang vs gcc? In contrast, the test on Python 2.7 always
+        # *fails* on GitHub actions (in both CPython 2.7 and PyPy). We're far past the EOL of
+        # Python 2.7 so I'm not going to spend much time investigating.
+        __import__('gevent')
+
+        # `sys.float_info.min` is the minimum representable positive normalized
+        # float, so dividing it by two gives us a positive subnormal float,
+        # as long as subnormals floats are not disabled.
+        self.assertGreater(sys.float_info.min / 2, 0.0)
+
+
+if __name__ == "__main__":
+    unittest.main()