Method test_empty_yield_from

Lib/test/test_ast/test_ast.py:605–611

(self)

                compile(e, "<test>", "eval")

    def test_empty_yield_from(self):
        # Issue 16546: yield from value is not optional.
        empty_yield_from = ast.parse("def f():\n yield from g()")
        empty_yield_from.body[0].body[0].value.value = None
        with self.assertRaises(ValueError) as cm:
            compile(empty_yield_from, "<test>", "exec")
        self.assertIn("field 'value' is required", str(cm.exception))

    @support.cpython_only
    def test_issue31592(self):