How to use lib0 - 10 common examples

flushRandomMessage () {
    const prng = this.prng
    const conns = Array.from(this.onlineConns).filter(conn => conn.receiving.size > 0)
    if (conns.length > 0) {
      const receiver = random.oneOf(prng, conns)
      const [sender, messages] = random.oneOf(prng, Array.from(receiver.receiving))
      const m = messages.shift()
      if (messages.length === 0) {
        receiver.receiving.delete(sender)
      }
      const encoder = encoding.createEncoder()
      receiver.mMux(() => {
        // console.log('receive (' + sender.userID + '->' + receiver.userID + '):\n', syncProtocol.stringifySyncMessage(decoding.createDecoder(m), receiver))
        // do not publish data created when this function is executed (could be ss2 or update message)
        syncProtocol.readSyncMessage(decoding.createDecoder(m), encoder, receiver)
      })
      if (encoding.length(encoder) > 0) {
        // send reply message
        sender._receive(encoding.toBuffer(encoder), receiver)
      }
      return true
    }
    return false
  }
  /**

export const testYmapSetsYarray = tc => {
  const { users, map0 } = init(tc, { users: 2 })
  const array = map0.set('Array', new Y.Array())
  t.assert(array === map0.get('Array'))
  array.insert(0, [1, 2, 3])
  // @ts-ignore
  t.compare(map0.toJSON(), { Array: [1, 2, 3] })
  compare(users)
}

const { users, text0 } = init(tc, { users: 2 })
  let delta
  text0.observe(event => {
    delta = event.delta
  })
  text0.insert(0, 'abc', { bold: true })
  t.assert(text0.toString() === 'abc', 'Basic insert with attributes works')
  t.compare(text0.toDelta(), [{ insert: 'abc', attributes: { bold: true } }])
  t.compare(delta, [{ insert: 'abc', attributes: { bold: true } }])
  text0.delete(0, 1)
  t.assert(text0.toString() === 'bc', 'Basic delete on formatted works (position 0)')
  t.compare(text0.toDelta(), [{ insert: 'bc', attributes: { bold: true } }])
  t.compare(delta, [{ delete: 1 }])
  text0.delete(1, 1)
  t.assert(text0.toString() === 'b', 'Basic delete works (position 1)')
  t.compare(text0.toDelta(), [{ insert: 'b', attributes: { bold: true } }])
  t.compare(delta, [{ retain: 1 }, { delete: 1 }])
  text0.insert(0, 'z', { bold: true })
  t.assert(text0.toString() === 'zb')
  t.compare(text0.toDelta(), [{ insert: 'zb', attributes: { bold: true } }])
  t.compare(delta, [{ insert: 'z', attributes: { bold: true } }])
  // @ts-ignore
  t.assert(text0._start.right.right.right.content.str === 'b', 'Does not insert duplicate attribute marker')
  text0.insert(0, 'y')
  t.assert(text0.toString() === 'yzb')
  t.compare(text0.toDelta(), [{ insert: 'y' }, { insert: 'zb', attributes: { bold: true } }])
  t.compare(delta, [{ insert: 'y' }])
  text0.format(0, 2, { bold: null })
  t.assert(text0.toString() === 'yzb')
  t.compare(text0.toDelta(), [{ insert: 'yz' }, { insert: 'b', attributes: { bold: true } }])
  t.compare(delta, [{ retain: 1 }, { retain: 1, attributes: { bold: null } }])
  compare(users)

receiver.mMux(() => {
        // console.log('receive (' + sender.userID + '->' + receiver.userID + '):\n', syncProtocol.stringifySyncMessage(decoding.createDecoder(m), receiver))
        // do not publish data created when this function is executed (could be ss2 or update message)
        syncProtocol.readSyncMessage(decoding.createDecoder(m), encoder, receiver)
      })
      if (encoding.length(encoder) > 0) {

flushRandomMessage () {
    const prng = this.prng
    const conns = Array.from(this.onlineConns).filter(conn => conn.receiving.size > 0)
    if (conns.length > 0) {
      const receiver = random.oneOf(prng, conns)
      const [sender, messages] = random.oneOf(prng, Array.from(receiver.receiving))
      const m = messages.shift()
      if (messages.length === 0) {
        receiver.receiving.delete(sender)
      }
      const encoder = encoding.createEncoder()
      receiver.mMux(() => {
        // console.log('receive (' + sender.userID + '->' + receiver.userID + '):\n', syncProtocol.stringifySyncMessage(decoding.createDecoder(m), receiver))
        // do not publish data created when this function is executed (could be ss2 or update message)
        syncProtocol.readSyncMessage(decoding.createDecoder(m), encoder, receiver)
      })
      if (encoding.length(encoder) > 0) {
        // send reply message
        sender._receive(encoding.toBuffer(encoder), receiver)
      }
      return true

if (random.bool(prng)) {
        testConnector.disconnectRandom()
      } else {
        testConnector.reconnectRandom()
      }
    } else if (random.int32(prng, 0, 100) <= 1) {
      // 1% chance to flush all & garbagecollect
      // TODO: We do not gc all users as this does not work yet
      // await garbageCollectUsers(t, users)
      testConnector.flushAllMessages()
      // await users[0].db.emptyGarbageCollector() // TODO: reintroduce GC tests!
    } else if (random.int32(prng, 0, 100) <= 50) {
      // 50% chance to flush a random message
      testConnector.flushRandomMessage()
    }
    let user = random.oneOf(prng, users)
    var test = random.oneOf(prng, mods)
    test(t, user, prng)
  }
  compareUsers(t, users)
  return result
}

flushRandomMessage () {
    const prng = this.prng
    const conns = Array.from(this.onlineConns).filter(conn => conn.receiving.size > 0)
    if (conns.length > 0) {
      const receiver = random.oneOf(prng, conns)
      const [sender, messages] = random.oneOf(prng, Array.from(receiver.receiving))
      const m = messages.shift()
      if (messages.length === 0) {
        receiver.receiving.delete(sender)
      }
      const encoder = encoding.createEncoder()
      receiver.mMux(() => {
        // console.log('receive (' + sender.userID + '->' + receiver.userID + '):\n', syncProtocol.stringifySyncMessage(decoding.createDecoder(m), receiver))
        // do not publish data created when this function is executed (could be ss2 or update message)
        syncProtocol.readSyncMessage(decoding.createDecoder(m), encoder, receiver)
      })
      if (encoding.length(encoder) > 0) {
        // send reply message
        sender._receive(encoding.toBuffer(encoder), receiver)
      }
      return true
    }

testConnector.disconnectRandom()
      } else {
        testConnector.reconnectRandom()
      }
    } else if (random.int32(prng, 0, 100) <= 1) {
      // 1% chance to flush all & garbagecollect
      // TODO: We do not gc all users as this does not work yet
      // await garbageCollectUsers(t, users)
      testConnector.flushAllMessages()
      // await users[0].db.emptyGarbageCollector() // TODO: reintroduce GC tests!
    } else if (random.int32(prng, 0, 100) <= 50) {
      // 50% chance to flush a random message
      testConnector.flushRandomMessage()
    }
    let user = random.oneOf(prng, users)
    var test = random.oneOf(prng, mods)
    test(t, user, prng)
  }
  compareUsers(t, users)
  return result
}

if (conns.length > 0) {
      const receiver = random.oneOf(prng, conns)
      const [sender, messages] = random.oneOf(prng, Array.from(receiver.receiving))
      const m = messages.shift()
      if (messages.length === 0) {
        receiver.receiving.delete(sender)
      }
      const encoder = encoding.createEncoder()
      receiver.mMux(() => {
        // console.log('receive (' + sender.userID + '->' + receiver.userID + '):\n', syncProtocol.stringifySyncMessage(decoding.createDecoder(m), receiver))
        // do not publish data created when this function is executed (could be ss2 or update message)
        syncProtocol.readSyncMessage(decoding.createDecoder(m), encoder, receiver)
      })
      if (encoding.length(encoder) > 0) {
        // send reply message
        sender._receive(encoding.toBuffer(encoder), receiver)
      }
      return true
    }
    return false
  }
  /**

xml1.observe(e => {
    remoteEvent = e
  })
  xml0.setAttribute('key', 'value')
  t.assert(event.attributesChanged.has('key'), 'YXmlEvent.attributesChanged on updated key')
  testConnector.flushAllMessages()
  t.assert(remoteEvent.attributesChanged.has('key'), 'YXmlEvent.attributesChanged on updated key (remote)')
  // check attributeRemoved
  xml0.removeAttribute('key')
  t.assert(event.attributesChanged.has('key'), 'YXmlEvent.attributesChanged on removed attribute')
  testConnector.flushAllMessages()
  t.assert(remoteEvent.attributesChanged.has('key'), 'YXmlEvent.attributesChanged on removed attribute (remote)')
  xml0.insert(0, [new Y.XmlText('some text')])
  t.assert(event.childListChanged, 'YXmlEvent.childListChanged on inserted element')
  testConnector.flushAllMessages()
  t.assert(remoteEvent.childListChanged, 'YXmlEvent.childListChanged on inserted element (remote)')
  // test childRemoved
  xml0.delete(0)
  t.assert(event.childListChanged, 'YXmlEvent.childListChanged on deleted element')
  testConnector.flushAllMessages()
  t.assert(remoteEvent.childListChanged, 'YXmlEvent.childListChanged on deleted element (remote)')
  compare(users)
}