'use strict';

const common = require('../common');

if (!common.hasCrypto)

common.skip('missing crypto');

// This test ensures that the built-in HTTP/2 diagnostics channels are reporting

// the diagnostics messages for the 'http2.server.stream.created' channel when

// ServerHttp2Streams are created by both:

// - in response to an incoming 'stream' event from the client

// - the server calling ServerHttp2Stream#pushStream()

const Countdown = require('../common/countdown');

const assert = require('assert');

const dc = require('diagnostics_channel');

const http2 = require('http2');

const { Duplex } = require('stream');

const serverHttp2StreamCreationCount = 2;

dc.subscribe('http2.server.stream.created', common.mustCall(({ stream, headers }) => {

// Since ServerHttp2Stream is not exported from any module, this just checks

// if the stream is an instance of Duplex and the constructor name is

// 'ServerHttp2Stream'.

assert.ok(stream instanceof Duplex);

assert.strictEqual(stream.constructor.name, 'ServerHttp2Stream');

assert.ok(headers && !Array.isArray(headers) && typeof headers === 'object');

}, serverHttp2StreamCreationCount));

const server = http2.createServer();

server.on('stream', common.mustCall((stream) => {

stream.respond();

stream.end();

stream.pushStream({}, common.mustSucceed((pushStream) => {

pushStream.respond();

pushStream.end();

}));

}));

server.listen(0, common.mustCall(() => {

const port = server.address().port;

const client = http2.connect(`http://localhost:${port}`);

const countdown = new Countdown(serverHttp2StreamCreationCount, () => {

client.close();

server.close();

});

const stream = client.request({});

stream.on('response', common.mustCall(() => {

countdown.dec();

}));

client.on('stream', common.mustCall((pushStream) => {

pushStream.on('push', common.mustCall(() => {

countdown.dec();

}));

}));

}));