How to use the hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS function in hyperframe

def test_apply_settings(self):
        c = tcp.TCPClient(("127.0.0.1", self.port))
        with c.connect():
            c.convert_to_ssl()
            protocol = HTTP2StateProtocol(c)

            protocol._apply_settings({
                hyperframe.frame.SettingsFrame.ENABLE_PUSH: 'foo',
                hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS: 'bar',
                hyperframe.frame.SettingsFrame.INITIAL_WINDOW_SIZE: 'deadbeef',
            })

            assert c.rfile.safe_read(2) == b"OK"

            assert protocol.http2_settings[
                hyperframe.frame.SettingsFrame.ENABLE_PUSH] == 'foo'
            assert protocol.http2_settings[
                hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS] == 'bar'
            assert protocol.http2_settings[
                hyperframe.frame.SettingsFrame.INITIAL_WINDOW_SIZE] == 'deadbeef'

def on_connection_made(self):
    logging.info('Connection Made')
    self._base_server._conn.initiate_connection()
    self._base_server._conn.update_settings(
                  {hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS: 1})
    self._base_server.transport.setTcpNoDelay(True)
    self._base_server.transport.write(self._base_server._conn.data_to_send())

class TestSettingsFrame(object):
    serialized = (
        b'\x00\x00\x2A\x04\x01\x00\x00\x00\x00' +  # Frame header
        b'\x00\x01\x00\x00\x10\x00' +              # HEADER_TABLE_SIZE
        b'\x00\x02\x00\x00\x00\x00' +              # ENABLE_PUSH
        b'\x00\x03\x00\x00\x00\x64' +              # MAX_CONCURRENT_STREAMS
        b'\x00\x04\x00\x00\xFF\xFF' +              # INITIAL_WINDOW_SIZE
        b'\x00\x05\x00\x00\x40\x00' +              # MAX_FRAME_SIZE
        b'\x00\x06\x00\x00\xFF\xFF' +              # MAX_HEADER_LIST_SIZE
        b'\x00\x08\x00\x00\x00\x01'                # ENABLE_CONNECT_PROTOCOL
    )

    settings = {
        SettingsFrame.HEADER_TABLE_SIZE: 4096,
        SettingsFrame.ENABLE_PUSH: 0,
        SettingsFrame.MAX_CONCURRENT_STREAMS: 100,
        SettingsFrame.INITIAL_WINDOW_SIZE: 65535,
        SettingsFrame.MAX_FRAME_SIZE: 16384,
        SettingsFrame.MAX_HEADER_LIST_SIZE: 65535,
        SettingsFrame.ENABLE_CONNECT_PROTOCOL: 1,
    }

    def test_settings_frame_has_only_one_flag(self):
        f = SettingsFrame()
        flags = f.parse_flags(0xFF)
        assert flags == set(['ACK'])

    def test_settings_frame_serializes_properly(self):
        f = SettingsFrame()
        f.parse_flags(0xFF)
        f.settings = self.settings

~~~~~~~

This module contains helpers for the h2 tests.
"""
from hyperframe.frame import (
    HeadersFrame, DataFrame, SettingsFrame, WindowUpdateFrame, PingFrame,
    GoAwayFrame, RstStreamFrame, PushPromiseFrame, PriorityFrame,
    ContinuationFrame, AltSvcFrame
)
from hpack.hpack import Encoder


SAMPLE_SETTINGS = {
    SettingsFrame.HEADER_TABLE_SIZE: 4096,
    SettingsFrame.ENABLE_PUSH: 1,
    SettingsFrame.MAX_CONCURRENT_STREAMS: 2,
}


class FrameFactory(object):
    """
    A class containing lots of helper methods and state to build frames. This
    allows test cases to easily build correct HTTP/2 frames to feed to
    hyper-h2.
    """
    def __init__(self):
        self.encoder = Encoder()

    def refresh_encoder(self):
        self.encoder = Encoder()

    def preamble(self):

from faker import Faker
from faker.providers import BaseProvider
from hpack.hpack import Encoder
from hyperframe.frame import (AltSvcFrame, ContinuationFrame, DataFrame,
                              GoAwayFrame, HeadersFrame, PingFrame,
                              PriorityFrame, PushPromiseFrame, RstStreamFrame,
                              SettingsFrame, WindowUpdateFrame)

from nio.crypto import OlmAccount, OlmDevice
from nio.store import Ed25519Key

SAMPLE_SETTINGS = {
    SettingsFrame.HEADER_TABLE_SIZE: 4096,
    SettingsFrame.ENABLE_PUSH: 1,
    SettingsFrame.MAX_CONCURRENT_STREAMS: 2,
}


faker = Faker()

class Provider(BaseProvider):
    def mx_id(self):
        return "@{}:{}".format(faker.user_name(), faker.hostname())

    def avatar_url(self):
        return "mxc://{}/{}#auto".format(
            faker.hostname(),
            "".join(choice(ascii_letters) for i in range(24))
        )

    def device_id(self):

All known HTTP/2 setting codes.

    .. versionadded:: 2.6.0
    """

    #: Allows the sender to inform the remote endpoint of the maximum size of
    #: the header compression table used to decode header blocks, in octets.
    HEADER_TABLE_SIZE = SettingsFrame.HEADER_TABLE_SIZE

    #: This setting can be used to disable server push. To disable server push
    #: on a client, set this to 0.
    ENABLE_PUSH = SettingsFrame.ENABLE_PUSH

    #: Indicates the maximum number of concurrent streams that the sender will
    #: allow.
    MAX_CONCURRENT_STREAMS = SettingsFrame.MAX_CONCURRENT_STREAMS

    #: Indicates the sender's initial window size (in octets) for stream-level
    #: flow control.
    INITIAL_WINDOW_SIZE = SettingsFrame.INITIAL_WINDOW_SIZE

    #: Indicates the size of the largest frame payload that the sender is
    #: willing to receive, in octets.
    MAX_FRAME_SIZE = SettingsFrame.MAX_FRAME_SIZE

    #: This advisory setting informs a peer of the maximum size of header list
    #: that the sender is prepared to accept, in octets.  The value is based on
    #: the uncompressed size of header fields, including the length of the name
    #: and value in octets plus an overhead of 32 octets for each header field.
    MAX_HEADER_LIST_SIZE = SettingsFrame.MAX_HEADER_LIST_SIZE

    #: This setting can be used to enable the connect protocol. To enable on a

def perform_server_connection_preface(self, force=False):
        if force or not self.connection_preface_performed:
            self.connection_preface_performed = True

            magic_length = len(self.CLIENT_CONNECTION_PREFACE)
            magic = self.tcp_handler.rfile.safe_read(magic_length)
            assert magic == self.CLIENT_CONNECTION_PREFACE

            frm = hyperframe.frame.SettingsFrame(settings={
                hyperframe.frame.SettingsFrame.ENABLE_PUSH: 0,
                hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS: 1,
            })
            self.send_frame(frm, hide=True)
            self._receive_settings(hide=True)

All known HTTP/2 setting codes.

    .. versionadded:: 2.6.0
    """

    #: Allows the sender to inform the remote endpoint of the maximum size of
    #: the header compression table used to decode header blocks, in octets.
    HEADER_TABLE_SIZE = SettingsFrame.HEADER_TABLE_SIZE

    #: This setting can be used to disable server push. To disable server push
    #: on a client, set this to 0.
    ENABLE_PUSH = SettingsFrame.ENABLE_PUSH

    #: Indicates the maximum number of concurrent streams that the sender will
    #: allow.
    MAX_CONCURRENT_STREAMS = SettingsFrame.MAX_CONCURRENT_STREAMS

    #: Indicates the sender's initial window size (in octets) for stream-level
    #: flow control.
    INITIAL_WINDOW_SIZE = SettingsFrame.INITIAL_WINDOW_SIZE

    #: Indicates the size of the largest frame payload that the sender is
    #: willing to receive, in octets.
    MAX_FRAME_SIZE = SettingsFrame.MAX_FRAME_SIZE

    #: This advisory setting informs a peer of the maximum size of header list
    #: that the sender is prepared to accept, in octets.  The value is based on
    #: the uncompressed size of header fields, including the length of the name
    #: and value in octets plus an overhead of 32 octets for each header field.
    MAX_HEADER_LIST_SIZE = SettingsFrame.MAX_HEADER_LIST_SIZE

    #: This setting can be used to enable the connect protocol. To enable on a

FRAME_SIZE_ERROR=0x6,
        REFUSED_STREAM=0x7,
        CANCEL=0x8,
        COMPRESSION_ERROR=0x9,
        CONNECT_ERROR=0xa,
        ENHANCE_YOUR_CALM=0xb,
        INADEQUATE_SECURITY=0xc,
        HTTP_1_1_REQUIRED=0xd
    )

    CLIENT_CONNECTION_PREFACE = b'PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n'

    HTTP2_DEFAULT_SETTINGS = {
        hyperframe.frame.SettingsFrame.HEADER_TABLE_SIZE: 4096,
        hyperframe.frame.SettingsFrame.ENABLE_PUSH: 1,
        hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS: None,
        hyperframe.frame.SettingsFrame.INITIAL_WINDOW_SIZE: 2 ** 16 - 1,
        hyperframe.frame.SettingsFrame.MAX_FRAME_SIZE: 2 ** 14,
        hyperframe.frame.SettingsFrame.MAX_HEADER_LIST_SIZE: None,
    }

    def __init__(
        self,
        tcp_handler=None,
        rfile=None,
        wfile=None,
        is_server=False,
        dump_frames=False,
        encoder=None,
        decoder=None,
        unhandled_frame_cb=None,
    ):