Method fun

tests/test_basics.py:185–191

()

        c = contextvars.ContextVar('a', default=0)

        def fun():
            self.assertEqual(c.get(), 0)
            self.assertIsNone(ctx.get(c))

            c.set(42)
            self.assertEqual(c.get(), 42)
            self.assertEqual(ctx.get(c), 42)

        ctx.run(fun)