import pdb
from email.message import EmailMessage

def test_encoding(s: str, expected: bytes):
    m = EmailMessage()
    m['Subject'] = s
    header = bytes(m)

    print('Original: "' + s + '"')
    print('Expected:', expected)
    print('Actual:  ', header)
    print('-- pass --' if header == expected else '-- fail--')
    print('')

test_encoding('Hello Wörld! Hello Wörld! Hello Wörld! Hello Wörld!Hello Wörld!', b'Subject: Hello =?utf-8?q?W=C3=B6rld!_Hello_W=C3=B6rld!_Hello_W=C3=B6rld!?=\n Hello =?utf-8?q?W=C3=B6rld!Hello_W=C3=B6rld!?=\n\n')
test_encoding('Hello Wörld! Hello Wörld! Hello Wörlds123! Hello Wörld!Hello Wörld!', b'Subject: Hello =?utf-8?q?W=C3=B6rld!_Hello_W=C3=B6rld!_Hello_W=C3=B6rlds123!?=\n Hello =?utf-8?q?W=C3=B6rld!Hello_W=C3=B6rld!?=\n\n')
test_encoding('Hello-Wörld!-Hello-Wörld!-Hello-Wörlds123! Hello Wörld!Hello Wörld!', b'Subject: =?utf-8?q?Hello-W=C3=B6rld!-Hello-W=C3=B6rld!-Hello-W=C3=B6rlds123!?=\n Hello =?utf-8?q?W=C3=B6rld!Hello_W=C3=B6rld!?=\n\n')
test_encoding('Hello-Wörld!-Hello-Wörld!-Hello-Wörlds123!-Hello Wörld!Hello Wörld!', b'Subject: =?utf-8?q?Hello-W=C3=B6rld!-Hello-W=C3=B6rld!-Hello-W=C3=B6rlds123!?=\n =?utf-8?q?-Hello_W=C3=B6rld!Hello_W=C3=B6rld!?=\n\n')
test_encoding('123456789 123456789 123456789 123456789 123456789 123456789 123456789 Hello Wörld!',  b'Subject: 123456789 123456789 123456789 123456789 123456789 123456789 123456789\n Hello =?utf-8?q?W=C3=B6rld!?=\n\n')
test_encoding('123456789 123456789 123456789 123456789 Hello Wörld! 123456789 123456789 123456789 123456789 123456789 123456789', b'Subject: 123456789 123456789 123456789 123456789 Hello =?utf-8?q?W=C3=B6rld!?=\n 123456789 123456789 123456789 123456789 123456789 123456789\n\n')
test_encoding('123456789 123456789 Hello Wörld! Hello Wörld! 123456789-123456789 123456789 Hello Wörld! 123456789 123456789', b'Subject: 123456789 123456789 Hello =?utf-8?q?W=C3=B6rld!_Hello_W=C3=B6rld!?=\n 123456789-123456789 123456789 Hello =?utf-8?q?W=C3=B6rld!?= 123456789\n 123456789\n\n')