Method test_unicode_address_header

tests/mail/tests.py:626–660

Regression for #11144 - When a to/from/cc header contains Unicode, make sure the email addresses are parsed correctly (especially with regards to commas)

(self)

        self.assertEqual(message.get_all("From"), ["from@example.com"])

    def test_unicode_address_header(self):
        """
        Regression for #11144 - When a to/from/cc header contains Unicode,
        make sure the email addresses are parsed correctly (especially with
        regards to commas)
        """
        with self.subTest("Without comma in display-name"):
            email = EmailMessage(
                to=['"Firstname Sürname" <to@example.com>', "other@example.com"],
            )
            parsed = message_from_bytes(email.message().as_bytes())
            self.assertEqual(
                parsed["To"].addresses,
                (
                    Address(
                        display_name="Firstname Sürname", addr_spec="to@example.com"
                    ),
                    Address(addr_spec="other@example.com"),
                ),
            )

        with self.subTest("With comma in display-name"):
            email = EmailMessage(
                to=['"Sürname, Firstname" <to@example.com>', "other@example.com"],
            )
            parsed = message_from_bytes(email.message().as_bytes())
            self.assertEqual(
                parsed["To"].addresses,
                (
                    Address(
                        display_name="Sürname, Firstname", addr_spec="to@example.com"
                    ),
                    Address(addr_spec="other@example.com"),
                ),
            )

    def test_unicode_headers(self):
        email = EmailMessage(