def METHOD_NAME():
    r = Request(
        method="GET",
        target="/",
        headers=[("Host", "example.org"), ("Connection", "keep-alive")],
        http_version="1.1",
    )
    assert len(r.headers) == 2
    assert r.headers[0] == (b"host", b"example.org")
    assert r.headers == [(b"host", b"example.org"), (b"connection", b"keep-alive")]
    assert r.headers.raw_items() == [
        (b"Host", b"example.org"),
        (b"Connection", b"keep-alive"),
    ]