How to use the waitress.compat.tobytes function in waitress

"Connection: Keep-Alive\r\n"
            "Content-Length: 0\r\n"
            "\r\n"
        )
        self.connect()
        self.sock.send(to_send)
        fp = self.sock.makefile("rb", 0)
        line = fp.readline()  # status line
        version, status, reason = (x.strip() for x in line.split(None, 2))
        headers = parse_headers(fp)
        content_length = int(headers.get("content-length"))
        response_body = fp.read(content_length)
        self.assertEqual(int(status), 200)
        self.assertNotEqual(content_length, len(response_body))
        self.assertEqual(len(response_body), content_length - 1)
        self.assertEqual(response_body, tobytes("abcdefghi"))
        # remote closed connection (despite keepalive header); not sure why
        # first send succeeds
        self.send_check_error(to_send)
        self.assertRaises(ConnectionClosed, read_http, fp)

def test_send_empty_body(self):
        to_send = "GET / HTTP/1.0\r\nContent-Length: 0\r\n\r\n"
        to_send = tobytes(to_send)
        self.connect()
        self.sock.send(to_send)
        fp = self.sock.makefile("rb", 0)
        line, headers, echo = self._read_echo(fp)
        self.assertline(line, "200", "OK", "HTTP/1.0")
        self.assertEqual(echo.content_length, "0")
        self.assertEqual(echo.body, b"")

def test_send_with_body(self):
        to_send = "GET / HTTP/1.0\r\nContent-Length: 5\r\n\r\n"
        to_send += "hello"
        to_send = tobytes(to_send)
        self.connect()
        self.sock.send(to_send)
        fp = self.sock.makefile("rb", 0)
        line, headers, echo = self._read_echo(fp)
        self.assertline(line, "200", "OK", "HTTP/1.0")
        self.assertEqual(echo.content_length, "5")
        self.assertEqual(echo.body, b"hello")

def test_filelike_nocl_http10(self):
        to_send = "GET /filelike_nocl HTTP/1.0\r\n\r\n"
        to_send = tobytes(to_send)

        self.connect()

        self.sock.send(to_send)
        fp = self.sock.makefile("rb", 0)
        line, headers, response_body = read_http(fp)
        self.assertline(line, "200", "OK", "HTTP/1.0")
        cl = int(headers["content-length"])
        self.assertEqual(cl, len(response_body))
        ct = headers["content-type"]
        self.assertEqual(ct, "image/jpeg")
        self.assertTrue(b"\377\330\377" in response_body)
        # connection has been closed
        self.send_check_error(to_send)
        self.assertRaises(ConnectionClosed, read_http, fp)

def test_chunking_request_with_content(self):
        control_line = b"20;\r\n"  # 20 hex = 32 dec
        s = b"This string has 32 characters.\r\n"
        expected = s * 12
        header = tobytes("GET / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n")
        self.connect()
        self.sock.send(header)
        fp = self.sock.makefile("rb", 0)
        for n in range(12):
            self.sock.send(control_line)
            self.sock.send(s)
            self.sock.send(b"\r\n")  # End the chunk
        self.sock.send(b"0\r\n\r\n")
        line, headers, echo = self._read_echo(fp)
        self.assertline(line, "200", "OK", "HTTP/1.1")
        self.assertEqual(echo.body, expected)
        self.assertEqual(echo.content_length, str(len(expected)))
        self.assertFalse("transfer-encoding" in headers)

def test_after_start_response_http10(self):
        to_send = "GET /after_start_response HTTP/1.0\r\n\r\n"
        to_send = tobytes(to_send)
        self.connect()
        self.sock.send(to_send)
        fp = self.sock.makefile("rb", 0)
        line, headers, response_body = read_http(fp)
        self.assertline(line, "500", "Internal Server Error", "HTTP/1.0")
        cl = int(headers["content-length"])
        self.assertEqual(cl, len(response_body))
        self.assertTrue(response_body.startswith(b"Internal Server Error"))
        self.assertEqual(
            sorted(headers.keys()),
            ["connection", "content-length", "content-type", "date", "server"],
        )
        self.assertEqual(headers["connection"], "close")
        # connection has been closed
        self.send_check_error(to_send)
        self.assertRaises(ConnectionClosed, read_http, fp)

def test_notfilelike_shortcl_http11(self):
        to_send = "GET /notfilelike_shortcl HTTP/1.1\r\n\r\n"
        to_send = tobytes(to_send)

        self.connect()

        for t in range(0, 2):
            self.sock.send(to_send)
            fp = self.sock.makefile("rb", 0)
            line, headers, response_body = read_http(fp)
            self.assertline(line, "200", "OK", "HTTP/1.1")
            cl = int(headers["content-length"])
            self.assertEqual(cl, 1)
            self.assertEqual(cl, len(response_body))
            ct = headers["content-type"]
            self.assertEqual(ct, "image/jpeg")
            self.assertTrue(b"\377" in response_body)
            # connection has not been closed

# check server doesnt close connection when body is too long
        # for cl header
        to_send = tobytes(
            "GET /long_body HTTP/1.0\r\n"
            "Connection: Keep-Alive\r\n"
            "Content-Length: 0\r\n"
            "\r\n"
        )
        self.connect()
        self.sock.send(to_send)
        fp = self.sock.makefile("rb", 0)
        line, headers, response_body = read_http(fp)
        content_length = int(headers.get("content-length")) or None
        self.assertEqual(content_length, 9)
        self.assertEqual(content_length, len(response_body))
        self.assertEqual(response_body, tobytes("abcdefghi"))
        # remote does not close connection (keepalive header)
        self.sock.send(to_send)
        fp = self.sock.makefile("rb", 0)
        line, headers, response_body = read_http(fp)
        self.assertline(line, "200", "OK", "HTTP/1.0")

def test_large_body(self):
        # 1024 characters.
        body = "This string has 32 characters.\r\n" * 32
        s = tobytes(
            "GET / HTTP/1.0\r\nContent-Length: %d\r\n\r\n%s" % (len(body), body)
        )
        self.connect()
        self.sock.send(s)
        fp = self.sock.makefile("rb", 0)
        line, headers, echo = self._read_echo(fp)
        self.assertline(line, "200", "OK", "HTTP/1.0")
        self.assertEqual(echo.content_length, "1024")
        self.assertEqual(echo.body, tobytes(body))

def test_filelike_shortcl_http11(self):
        to_send = "GET /filelike_shortcl HTTP/1.1\r\n\r\n"
        to_send = tobytes(to_send)

        self.connect()

        for t in range(0, 2):
            self.sock.send(to_send)
            fp = self.sock.makefile("rb", 0)
            line, headers, response_body = read_http(fp)
            self.assertline(line, "200", "OK", "HTTP/1.1")
            cl = int(headers["content-length"])
            self.assertEqual(cl, 1)
            self.assertEqual(cl, len(response_body))
            ct = headers["content-type"]
            self.assertEqual(ct, "image/jpeg")
            self.assertTrue(b"\377" in response_body)
            # connection has not been closed