v13.0.0-13 -- distribution files

examples/textarea/index.js

@@ -1,5 +1,9 @@
 /* global Y */
 
+// eslint-disable-next-line
+let search = new URLSearchParams(location.search)
+let url = search.get('url')
+
 // initialize a shared object. This function call returns a promise!
 Y({
   db: {
@@ -8,7 +12,7 @@ Y({
   connector: {
     name: 'websockets-client',
     room: 'Textarea-example',
-    url: 'http://127.0.0.1:1234'
+    url: url || 'http://127.0.0.1:1234'
   },
   sourceDir: '/bower_components',
   share: {

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "yjs",
-  "version": "13.0.0-7",
+  "version": "13.0.0-13",
   "lockfileVersion": 1,
   "dependencies": {
     "accepts": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "yjs",
-  "version": "13.0.0-10",
+  "version": "13.0.0-13",
   "description": "A framework for real-time p2p shared editing on any data",
   "main": "./y.node.js",
   "browser": "./y.js",

src/Connector.js

@@ -43,10 +43,12 @@ export default function extendConnector (Y/* :any */) {
         this.setUserId(Y.utils.generateUserId())
       }
     }
+
     reconnect () {
       this.log('reconnecting..')
       return this.y.db.startGarbageCollector()
     }
+
     disconnect () {
       this.log('discronnecting..')
       this.connections = new Map()
@@ -56,13 +58,16 @@ export default function extendConnector (Y/* :any */) {
       this.y.db.stopGarbageCollector()
       return this.y.db.whenTransactionsFinished()
     }
+
     repair () {
       this.log('Repairing the state of Yjs. This can happen if messages get lost, and Yjs detects that something is wrong. If this happens often, please report an issue here: https://github.com/y-js/yjs/issues')
-      this.connections.forEach(user => { user.isSynced = false })
       this.isSynced = false
-      this.currentSyncTarget = null
+      this.connections.forEach((user, userId) => {
-      this.findNextSyncTarget()
+        user.isSynced = false
+        this._syncWithUser(userId)
+      })
     }
+
     setUserId (userId) {
       if (this.userId == null) {
         if (!Number.isInteger(userId)) {
@@ -77,20 +82,21 @@ export default function extendConnector (Y/* :any */) {
         return null
       }
     }
+
     onUserEvent (f) {
       this.userEventListeners.push(f)
     }
+
     removeUserEventListener (f) {
       this.userEventListeners = this.userEventListeners.filter(g => f !== g)
     }
+
     userLeft (user) {
       if (this.connections.has(user)) {
         this.log('%s: User left %s', this.userId, user)
         this.connections.delete(user)
-        if (user === this.currentSyncTarget) {
+        // check if isSynced event can be sent now
-          this.currentSyncTarget = null
+        this._setSyncedWith(null)
-          this.findNextSyncTarget()
-        }
         for (var f of this.userEventListeners) {
           f({
             action: 'userLeft',
@@ -99,7 +105,7 @@ export default function extendConnector (Y/* :any */) {
         }
       }
     }
-    userJoined (user, role) {
+    userJoined (user, role, auth) {
       if (role == null) {
         throw new Error('You must specify the role of the joined user!')
       }
@@ -112,7 +118,7 @@ export default function extendConnector (Y/* :any */) {
         isSynced: false,
         role: role,
         processAfterAuth: [],
-        auth: null,
+        auth: auth || null,
         receivedSyncStep2: false
       })
       let defer = {}
@@ -125,9 +131,7 @@ export default function extendConnector (Y/* :any */) {
           role: role
         })
       }
-      if (this.currentSyncTarget == null) {
+      this._syncWithUser(user)
-        this.findNextSyncTarget()
-      }
     }
     // Execute a function _when_ we are connected.
     // If not connected, wait until connected
@@ -138,27 +142,11 @@ export default function extendConnector (Y/* :any */) {
         this.whenSyncedListeners.push(f)
       }
     }
-    findNextSyncTarget () {
+    _syncWithUser (userid) {
-      if (this.currentSyncTarget != null || this.role === 'slave') {
+      if (this.role === 'slave') {
         return // "The current sync has not finished or this is controlled by a master!"
       }
-
+      sendSyncStep1(this, userid)
-      var syncUser = null
-      for (var [uid, user] of this.connections) {
-        if (!user.isSynced) {
-          syncUser = uid
-          break
-        }
-      }
-      var conn = this
-      if (syncUser != null) {
-        this.currentSyncTarget = syncUser
-        sendSyncStep1(this, syncUser)
-      } else {
-        if (!conn.isSynced) {
-          conn._fireIsSyncedListeners()
-        }
-      }
     }
     _fireIsSyncedListeners () {
       this.y.db.whenTransactionsFinished().then(() => {
@@ -222,7 +210,8 @@ export default function extendConnector (Y/* :any */) {
     /*
       You received a raw message, and you know that it is intended for Yjs. Then call this function.
     */
-    receiveMessage (sender, buffer) {
+    receiveMessage (sender, buffer, skipAuth) {
+      skipAuth = skipAuth || false
       if (!(buffer instanceof ArrayBuffer || buffer instanceof Uint8Array)) {
         return Promise.reject(new Error('Expected Message to be an ArrayBuffer or Uint8Array!'))
       }
@@ -239,7 +228,7 @@ export default function extendConnector (Y/* :any */) {
       this.log('%s: Receive \'%s\' from %s', this.userId, messageType, sender)
       this.logMessage('Message: %Y', buffer)
 
-      if (senderConn == null) {
+      if (senderConn == null && !skipAuth) {
         throw new Error('Received message from unknown peer!')
       }
 
@@ -265,38 +254,37 @@ export default function extendConnector (Y/* :any */) {
           })
         }
       }
-      if (senderConn.auth != null) {
+      if (skipAuth || senderConn.auth != null) {
-        return this.computeMessage(messageType, senderConn, decoder, encoder, sender)
+        return this.computeMessage(messageType, senderConn, decoder, encoder, sender, skipAuth)
       } else {
-        senderConn.processAfterAuth.push([messageType, senderConn, decoder, encoder, sender])
+        senderConn.processAfterAuth.push([messageType, senderConn, decoder, encoder, sender, false])
       }
     }
-    computeMessage (messageType, senderConn, decoder, encoder, sender) {
+
+    computeMessage (messageType, senderConn, decoder, encoder, sender, skipAuth) {
       if (messageType === 'sync step 1' && (senderConn.auth === 'write' || senderConn.auth === 'read')) {
         // cannot wait for sync step 1 to finish, because we may wait for sync step 2 in sync step 1 (->lock)
         computeMessageSyncStep1(decoder, encoder, this, senderConn, sender)
         return this.y.db.whenTransactionsFinished()
       } else if (messageType === 'sync step 2' && senderConn.auth === 'write') {
         return computeMessageSyncStep2(decoder, encoder, this, senderConn, sender)
-      } else if (messageType === 'update' && senderConn.auth === 'write') {
+      } else if (messageType === 'update' && (skipAuth || senderConn.auth === 'write')) {
         return computeMessageUpdate(decoder, encoder, this, senderConn, sender)
       } else {
         return Promise.reject(new Error('Unable to receive message'))
       }
     }
+
     _setSyncedWith (user) {
-      var conn = this.connections.get(user)
+      if (user != null) {
-      if (conn != null) {
+        this.connections.get(user).isSynced = true
-        conn.isSynced = true
       }
-      if (user === this.currentSyncTarget) {
+      let conns = Array.from(this.connections.values())
-        this.currentSyncTarget = null
+      if (conns.length > 0 && conns.every(u => u.isSynced)) {
-        this.findNextSyncTarget()
-      }
-      if (this.role === 'slave' && conn.role === 'master') {
         this._fireIsSyncedListeners()
       }
     }
+
     /*
       Currently, the HB encodes operations as JSON. For the moment I want to keep it
       that way. Maybe we support encoding in the HB as XML in the future, but for now I don't want

src/Database.js

@@ -120,7 +120,7 @@ export default function extendDatabase (Y /* :any */) {
     startGarbageCollector () {
       this.gc = this.dbOpts.gc
       if (this.gc) {
-        this.gcTimeout = !this.dbOpts.gcTimeout ? 100000 : this.dbOpts.gcTimeout
+        this.gcTimeout = !this.dbOpts.gcTimeout ? 30000 : this.dbOpts.gcTimeout
       } else {
         this.gcTimeout = -1
       }

src/Encoding.js

@@ -7,37 +7,46 @@ export class BinaryEncoder {
   constructor () {
     this.data = []
   }
+
   get pos () {
     return this.data.length
   }
+
   createBuffer () {
     return Uint8Array.from(this.data).buffer
   }
+
   writeUint8 (num) {
     this.data.push(num & bits8)
   }
+
   setUint8 (pos, num) {
     this.data[pos] = num & bits8
   }
+
   writeUint16 (num) {
     this.data.push(num & bits8, (num >>> 8) & bits8)
   }
+
   setUint16 (pos, num) {
     this.data[pos] = num & bits8
     this.data[pos + 1] = (num >>> 8) & bits8
   }
+
   writeUint32 (num) {
     for (let i = 0; i < 4; i++) {
       this.data.push(num & bits8)
       num >>>= 8
     }
   }
+
   setUint32 (pos, num) {
     for (let i = 0; i < 4; i++) {
       this.data[pos + i] = num & bits8
       num >>>= 8
     }
   }
+
   writeVarUint (num) {
     while (num >= 0b10000000) {
       this.data.push(0b10000000 | (bits7 & num))
@@ -45,6 +54,7 @@ export class BinaryEncoder {
     }
     this.data.push(bits7 & num)
   }
+
   writeVarString (str) {
     let bytes = utf8.setBytesFromString(str)
     let len = bytes.length
@@ -53,6 +63,7 @@ export class BinaryEncoder {
       this.data.push(bytes[i])
     }
   }
+
   writeOpID (id) {
     let user = id[0]
     this.writeVarUint(user)
@@ -68,19 +79,22 @@ export class BinaryDecoder {
   constructor (buffer) {
     if (buffer instanceof ArrayBuffer) {
       this.uint8arr = new Uint8Array(buffer)
-    } else if (buffer instanceof Uint8Array) {
+    } else if (buffer instanceof Uint8Array || (typeof Buffer !== 'undefined' && buffer instanceof Buffer)) {
       this.uint8arr = buffer
     } else {
       throw new Error('Expected an ArrayBuffer or Uint8Array!')
     }
     this.pos = 0
   }
+
   skip8 () {
     this.pos++
   }
+
   readUint8 () {
     return this.uint8arr[this.pos++]
   }
+
   readUint32 () {
     let uint =
       this.uint8arr[this.pos] +
@@ -90,9 +104,11 @@ export class BinaryDecoder {
     this.pos += 4
     return uint
   }
+
   peekUint8 () {
     return this.uint8arr[this.pos]
   }
+
   readVarUint () {
     let num = 0
     let len = 0
@@ -108,6 +124,7 @@ export class BinaryDecoder {
       }
     }
   }
+
   readVarString () {
     let len = this.readVarUint()
     let bytes = new Array(len)
@@ -116,12 +133,14 @@ export class BinaryDecoder {
     }
     return utf8.getStringFromBytes(bytes)
   }
+
   peekVarString () {
     let pos = this.pos
     let s = this.readVarString()
     this.pos = pos
     return s
   }
+
   readOpID () {
     let user = this.readVarUint()
     if (user !== 0xFFFFFF) {

src/MessageHandler.js

@@ -34,7 +34,7 @@ export function logMessageUpdate (decoder, strBuilder) {
 }
 
 export function computeMessageUpdate (decoder, encoder, conn) {
-  if (conn.y.db.forwardAppliedOperations) {
+  if (conn.y.db.forwardAppliedOperations || conn.y.persistence != null) {
     let messagePosition = decoder.pos
     let len = decoder.readUint32()
     let delops = []
@@ -45,7 +45,12 @@ export function computeMessageUpdate (decoder, encoder, conn) {
       }
     }
     if (delops.length > 0) {
-      conn.broadcastOps(delops)
+      if (conn.y.db.forwardAppliedOperations) {
+        conn.broadcastOps(delops)
+      }
+      if (conn.y.persistence) {
+        conn.y.persistence.saveOperations(delops)
+      }
     }
     decoder.pos = messagePosition
   }
@@ -92,27 +97,30 @@ export function computeMessageSyncStep1 (decoder, encoder, conn, senderConn, sen
     conn.y.destroy()
   }
 
-  // send sync step 2
+  return conn.y.db.whenTransactionsFinished().then(() => {
-  conn.y.db.requestTransaction(function * () {
+    // send sync step 2
-    encoder.writeVarString('sync step 2')
+    conn.y.db.requestTransaction(function * () {
-    encoder.writeVarString(conn.authInfo || '')
+      encoder.writeVarString('sync step 2')
+      encoder.writeVarString(conn.authInfo || '')
 
-    if (preferUntransformed) {
+      if (preferUntransformed) {
-      encoder.writeUint8(1)
+        encoder.writeUint8(1)
-      yield * this.writeOperationsUntransformed(encoder)
+        yield * this.writeOperationsUntransformed(encoder)
-    } else {
+      } else {
-      encoder.writeUint8(0)
+        encoder.writeUint8(0)
-      yield * this.writeOperations(encoder, decoder)
+        yield * this.writeOperations(encoder, decoder)
-    }
+      }
 
-    yield * this.writeDeleteSet(encoder)
+      yield * this.writeDeleteSet(encoder)
-    conn.send(senderConn.uid, encoder.createBuffer())
+      conn.send(senderConn.uid, encoder.createBuffer())
-    senderConn.receivedSyncStep2 = true
+      senderConn.receivedSyncStep2 = true
+    })
+    return conn.y.db.whenTransactionsFinished().then(() => {
+      if (conn.role === 'slave') {
+        sendSyncStep1(conn, sender)
+      }
+    })
   })
-  if (conn.role === 'slave') {
-    sendSyncStep1(conn, sender)
-  }
-  return conn.y.db.whenTransactionsFinished()
 }
 
 export function logSS (decoder, strBuilder) {

src/Persistence.js

@@ -0,0 +1,43 @@
+import { BinaryEncoder } from './Encoding.js'
+
+export default function extendPersistence (Y) {
+  class AbstractPersistence {
+    constructor (y, opts) {
+      this.y = y
+      this.opts = opts
+      this.saveOperationsBuffer = []
+      this.log = Y.debug('y:persistence')
+    }
+    saveToMessageQueue (binary) {
+      this.log('Room %s: Save message to message queue', this.y.options.connector.room)
+    }
+    saveOperations (ops) {
+      ops = ops.map(function (op) {
+        return Y.Struct[op.struct].encode(op)
+      })
+      const saveOperations = () => {
+        if (this.saveOperationsBuffer.length > 0) {
+          let encoder = new BinaryEncoder()
+          encoder.writeVarString(this.opts.room)
+          encoder.writeVarString('update')
+          let ops = this.saveOperationsBuffer
+          this.saveOperationsBuffer = []
+          let length = ops.length
+          encoder.writeUint32(length)
+          for (var i = 0; i < length; i++) {
+            let op = ops[i]
+            Y.Struct[op.struct].binaryEncode(encoder, op)
+          }
+          this.saveToMessageQueue(encoder.createBuffer())
+        }
+      }
+      if (this.saveOperationsBuffer.length === 0) {
+        this.saveOperationsBuffer = ops
+        this.y.db.whenTransactionsFinished().then(saveOperations)
+      } else {
+        this.saveOperationsBuffer = this.saveOperationsBuffer.concat(ops)
+      }
+    }
+  }
+  Y.AbstractPersistence = AbstractPersistence
+}

src/Transaction.js

@@ -1,3 +1,4 @@
+import { BinaryEncoder, BinaryDecoder } from './Encoding.js'
 
 /*
   Partial definition of a transaction
@@ -97,6 +98,9 @@ export default function extendTransaction (Y) {
       if (send.length > 0) { // TODO: && !this.store.forwardAppliedOperations (but then i don't send delete ops)
         // is connected, and this is not going to be send in addOperation
         this.store.y.connector.broadcastOps(send)
+        if (this.store.y.persistence != null) {
+          this.store.y.persistence.saveOperations(send)
+        }
       }
     }
 
@@ -679,10 +683,15 @@ export default function extendTransaction (Y) {
             yield * this.garbageCollectOperation(o.id)
           }
         }
-        if (this.store.forwardAppliedOperations) {
+        if (this.store.forwardAppliedOperations || this.store.y.persistence != null) {
           var ops = []
           ops.push({struct: 'Delete', target: [del[0], del[1]], length: del[2]})
-          this.store.y.connector.broadcastOps(ops)
+          if (this.store.forwardAppliedOperations) {
+            this.store.y.connector.broadcastOps(ops)
+          }
+          if (this.store.y.persistence != null) {
+            this.store.y.persistence.saveOperations(ops)
+          }
         }
       }
     }
@@ -733,9 +742,14 @@ export default function extendTransaction (Y) {
     * addOperation (op) {
       yield * this.os.put(op)
       // case op is created by this user, op is already broadcasted in applyCreatedOperations
-      if (op.id[0] !== this.store.userId && this.store.forwardAppliedOperations && typeof op.id[1] !== 'string') {
+      if (op.id[0] !== this.store.userId && typeof op.id[1] !== 'string') {
-        // is connected, and this is not going to be send in addOperation
+        if (this.store.forwardAppliedOperations) {
-        this.store.y.connector.broadcastOps([op])
+          // is connected, and this is not going to be send in addOperation
+          this.store.y.connector.broadcastOps([op])
+        }
+        if (this.store.y.persistence != null) {
+          this.store.y.persistence.saveOperations([op])
+        }
       }
     }
     // if insertion, try to combine with left insertion (if both have content property)
@@ -1072,6 +1086,20 @@ export default function extendTransaction (Y) {
         Y.Struct[op.struct].binaryEncode(encoder, Y.Struct[op.struct].encode(op))
       }
     }
+
+    * toBinary () {
+      let encoder = new BinaryEncoder()
+      yield * this.writeOperationsUntransformed(encoder)
+      yield * this.writeDeleteSet(encoder)
+      return encoder.createBuffer()
+    }
+
+    * fromBinary (buffer) {
+      let decoder = new BinaryDecoder(buffer)
+      yield * this.applyOperationsUntransformed(decoder)
+      yield * this.applyDeleteSet(decoder)
+    }
+
     /*
      * Get the plain untransformed operations from the database.
      * You can apply these operations using .applyOperationsUntransformed(ops)

src/y.js

@@ -1,4 +1,5 @@
 import extendConnector from './Connector.js'
+import extendPersistence from './Persistence.js'
 import extendDatabase from './Database.js'
 import extendTransaction from './Transaction.js'
 import extendStruct from './Struct.js'
@@ -7,6 +8,7 @@ import debug from 'debug'
 import { formatYjsMessage, formatYjsMessageType } from './MessageHandler.js'
 
 extendConnector(Y)
+extendPersistence(Y)
 extendDatabase(Y)
 extendTransaction(Y)
 extendStruct(Y)
@@ -159,6 +161,11 @@ class YConfig extends Y.utils.NamedEventHandler {
     this.options = opts
     this.db = new Y[opts.db.name](this, opts.db)
     this.connector = new Y[opts.connector.name](this, opts.connector)
+    if (opts.persistence != null) {
+      this.persistence = new Y[opts.persistence.name](this, opts.persistence)
+    } else {
+      this.persistence = null
+    }
     this.connected = true
   }
   init (callback) {
@@ -188,9 +195,15 @@ class YConfig extends Y.utils.NamedEventHandler {
         }
         share[propertyname] = yield * this.store.initType.call(this, id, args)
       }
-      this.store.whenTransactionsFinished()
-        .then(callback)
     })
+    if (this.persistence != null) {
+      this.persistence.retrieveContent()
+        .then(() => this.db.whenTransactionsFinished())
+        .then(callback)
+    } else {
+      this.db.whenTransactionsFinished()
+        .then(callback)
+    }
   }
   isConnected () {
     return this.connector.isSynced

test/y-array.tests.js

@@ -0,0 +1,374 @@
+import { wait, initArrays, compareUsers, Y, flushAll, garbageCollectUsers, applyRandomTests } from '../tests-lib/helper.js'
+import { test, proxyConsole } from 'cutest'
+
+proxyConsole()
+
+test('basic spec', async function array0 (t) {
+  let { users, array0 } = await initArrays(t, { users: 2 })
+
+  array0.delete(0, 0)
+  t.assert(true, 'Does not throw when deleting zero elements with position 0')
+
+  let throwInvalidPosition = false
+  try {
+    array0.delete(1, 0)
+  } catch (e) {
+    throwInvalidPosition = true
+  }
+  t.assert(throwInvalidPosition, 'Throws when deleting zero elements with an invalid position')
+
+  array0.insert(0, ['A'])
+  array0.delete(1, 0)
+  t.assert(true, 'Does not throw when deleting zero elements with valid position 1')
+
+  await compareUsers(t, users)
+})
+
+test('insert three elements, try re-get property', async function array1 (t) {
+  var { users, array0, array1 } = await initArrays(t, { users: 2 })
+  array0.insert(0, [1, 2, 3])
+  t.compare(array0.toArray(), [1, 2, 3], '.toArray() works')
+  await flushAll(t, users)
+  t.compare(array1.toArray(), [1, 2, 3], '.toArray() works after sync')
+  await compareUsers(t, users)
+})
+
+test('concurrent insert (handle three conflicts)', async function array2 (t) {
+  var { users, array0, array1, array2 } = await initArrays(t, { users: 3 })
+  array0.insert(0, [0])
+  array1.insert(0, [1])
+  array2.insert(0, [2])
+
+  await compareUsers(t, users)
+})
+
+test('concurrent insert&delete (handle three conflicts)', async function array3 (t) {
+  var { users, array0, array1, array2 } = await initArrays(t, { users: 3 })
+  array0.insert(0, ['x', 'y', 'z'])
+  await flushAll(t, users)
+  array0.insert(1, [0])
+  array1.delete(0)
+  array1.delete(1, 1)
+  array2.insert(1, [2])
+
+  await compareUsers(t, users)
+})
+
+test('insertions work in late sync', async function array4 (t) {
+  var { users, array0, array1, array2 } = await initArrays(t, { users: 3 })
+  array0.insert(0, ['x', 'y'])
+  await flushAll(t, users)
+  users[1].disconnect()
+  users[2].disconnect()
+  array0.insert(1, ['user0'])
+  array1.insert(1, ['user1'])
+  array2.insert(1, ['user2'])
+  await users[1].reconnect()
+  await users[2].reconnect()
+  await compareUsers(t, users)
+})
+
+test('disconnect really prevents sending messages', async function array5 (t) {
+  var { users, array0, array1 } = await initArrays(t, { users: 3 })
+  array0.insert(0, ['x', 'y'])
+  await flushAll(t, users)
+  users[1].disconnect()
+  users[2].disconnect()
+  array0.insert(1, ['user0'])
+  array1.insert(1, ['user1'])
+  await wait(1000)
+  t.compare(array0.toArray(), ['x', 'user0', 'y'])
+  t.compare(array1.toArray(), ['x', 'user1', 'y'])
+  await users[1].reconnect()
+  await users[2].reconnect()
+  await compareUsers(t, users)
+})
+
+test('deletions in late sync', async function array6 (t) {
+  var { users, array0, array1 } = await initArrays(t, { users: 2 })
+  array0.insert(0, ['x', 'y'])
+  await flushAll(t, users)
+  await users[1].disconnect()
+  array1.delete(1, 1)
+  array0.delete(0, 2)
+  await wait()
+  await users[1].reconnect()
+  await compareUsers(t, users)
+})
+
+test('insert, then marge delete on sync', async function array7 (t) {
+  var { users, array0, array1 } = await initArrays(t, { users: 2 })
+  array0.insert(0, ['x', 'y', 'z'])
+  await flushAll(t, users)
+  await wait()
+  await users[0].disconnect()
+  array1.delete(0, 3)
+  await wait()
+  await users[0].reconnect()
+  await compareUsers(t, users)
+})
+
+function compareEvent (t, is, should) {
+  for (var key in should) {
+    t.assert(
+      should[key] === is[key] ||
+      JSON.stringify(should[key]) === JSON.stringify(is[key])
+    , 'event works as expected'
+    )
+  }
+}
+
+test('insert & delete events', async function array8 (t) {
+  var { array0, users } = await initArrays(t, { users: 2 })
+  var event
+  array0.observe(function (e) {
+    event = e
+  })
+  array0.insert(0, [0, 1, 2])
+  compareEvent(t, event, {
+    type: 'insert',
+    index: 0,
+    values: [0, 1, 2],
+    length: 3
+  })
+  array0.delete(0)
+  compareEvent(t, event, {
+    type: 'delete',
+    index: 0,
+    length: 1,
+    values: [0]
+  })
+  array0.delete(0, 2)
+  compareEvent(t, event, {
+    type: 'delete',
+    index: 0,
+    length: 2,
+    values: [1, 2]
+  })
+  await compareUsers(t, users)
+})
+
+test('insert & delete events for types', async function array9 (t) {
+  var { array0, users } = await initArrays(t, { users: 2 })
+  var event
+  array0.observe(function (e) {
+    event = e
+  })
+  array0.insert(0, [Y.Array])
+  compareEvent(t, event, {
+    type: 'insert',
+    object: array0,
+    index: 0,
+    length: 1
+  })
+  var type = array0.get(0)
+  t.assert(type._model != null, 'Model of type is defined')
+  array0.delete(0)
+  compareEvent(t, event, {
+    type: 'delete',
+    object: array0,
+    index: 0,
+    length: 1
+  })
+  await compareUsers(t, users)
+})
+
+test('insert & delete events for types (2)', async function array10 (t) {
+  var { array0, users } = await initArrays(t, { users: 2 })
+  var events = []
+  array0.observe(function (e) {
+    events.push(e)
+  })
+  array0.insert(0, ['hi', Y.Map])
+  compareEvent(t, events[0], {
+    type: 'insert',
+    object: array0,
+    index: 0,
+    length: 1,
+    values: ['hi']
+  })
+  compareEvent(t, events[1], {
+    type: 'insert',
+    object: array0,
+    index: 1,
+    length: 1
+  })
+  array0.delete(1)
+  compareEvent(t, events[2], {
+    type: 'delete',
+    object: array0,
+    index: 1,
+    length: 1
+  })
+  await compareUsers(t, users)
+})
+
+test('garbage collector', async function gc1 (t) {
+  var { users, array0 } = await initArrays(t, { users: 3 })
+
+  array0.insert(0, ['x', 'y', 'z'])
+  await flushAll(t, users)
+  users[0].disconnect()
+  array0.delete(0, 3)
+  await wait()
+  await users[0].reconnect()
+  await flushAll(t, users)
+  await garbageCollectUsers(t, users)
+  await compareUsers(t, users)
+})
+
+test('event has correct value when setting a primitive on a YArray (same user)', async function array11 (t) {
+  var { array0, users } = await initArrays(t, { users: 3 })
+
+  var event
+  array0.observe(function (e) {
+    event = e
+  })
+  array0.insert(0, ['stuff'])
+  t.assert(event.values[0] === event.object.get(0), 'compare value with get method')
+  t.assert(event.values[0] === 'stuff', 'check that value is actually present')
+  t.assert(event.values[0] === array0.toArray()[0], '.toArray works as expected')
+  await compareUsers(t, users)
+})
+
+test('event has correct value when setting a primitive on a YArray (received from another user)', async function array12 (t) {
+  var { users, array0, array1 } = await initArrays(t, { users: 3 })
+
+  var event
+  array0.observe(function (e) {
+    event = e
+  })
+  array1.insert(0, ['stuff'])
+  await flushAll(t, users)
+  t.assert(event.values[0] === event.object.get(0), 'compare value with get method')
+  t.assert(event.values[0] === 'stuff', 'check that value is actually present')
+  t.assert(event.values[0] === array0.toArray()[0], '.toArray works as expected')
+  await compareUsers(t, users)
+})
+
+test('event has correct value when setting a type on a YArray (same user)', async function array13 (t) {
+  var { array0, users } = await initArrays(t, { users: 3 })
+
+  var event
+  array0.observe(function (e) {
+    event = e
+  })
+  array0.insert(0, [Y.Array])
+  t.assert(event.values[0] === event.object.get(0), 'compare value with get method')
+  t.assert(event.values[0] != null, 'event.value exists')
+  t.assert(event.values[0] === array0.toArray()[0], '.toArray works as expected')
+  await compareUsers(t, users)
+})
+test('event has correct value when setting a type on a YArray (ops received from another user)', async function array14 (t) {
+  var { users, array0, array1 } = await initArrays(t, { users: 3 })
+
+  var event
+  array0.observe(function (e) {
+    event = e
+  })
+  array1.insert(0, [Y.Array])
+  await flushAll(t, users)
+  t.assert(event.values[0] === event.object.get(0), 'compare value with get method')
+  t.assert(event.values[0] != null, 'event.value exists')
+  t.assert(event.values[0] === array0.toArray()[0], '.toArray works as expected')
+  await compareUsers(t, users)
+})
+
+var _uniqueNumber = 0
+function getUniqueNumber () {
+  return _uniqueNumber++
+}
+
+var arrayTransactions = [
+  function insert (t, user, chance) {
+    var uniqueNumber = getUniqueNumber()
+    var content = []
+    var len = chance.integer({ min: 1, max: 4 })
+    for (var i = 0; i < len; i++) {
+      content.push(uniqueNumber)
+    }
+    var pos = chance.integer({ min: 0, max: user.share.array.length })
+    user.share.array.insert(pos, content)
+  },
+  function insertTypeArray (t, user, chance) {
+    var pos = chance.integer({ min: 0, max: user.share.array.length })
+    user.share.array.insert(pos, [Y.Array])
+    var array2 = user.share.array.get(pos)
+    array2.insert(0, [1, 2, 3, 4])
+  },
+  function insertTypeMap (t, user, chance) {
+    var pos = chance.integer({ min: 0, max: user.share.array.length })
+    user.share.array.insert(pos, [Y.Map])
+    var map = user.share.array.get(pos)
+    map.set('someprop', 42)
+    map.set('someprop', 43)
+    map.set('someprop', 44)
+  },
+  function _delete (t, user, chance) {
+    var length = user.share.array._content.length
+    if (length > 0) {
+      var pos = chance.integer({ min: 0, max: length - 1 })
+      var delLength = chance.integer({ min: 1, max: Math.min(2, length - pos) })
+      if (user.share.array._content[pos].type != null) {
+        if (chance.bool()) {
+          var type = user.share.array.get(pos)
+          if (type instanceof Y.Array.typeDefinition.class) {
+            if (type._content.length > 0) {
+              pos = chance.integer({ min: 0, max: type._content.length - 1 })
+              delLength = chance.integer({ min: 0, max: Math.min(2, type._content.length - pos) })
+              type.delete(pos, delLength)
+            }
+          } else {
+            type.delete('someprop')
+          }
+        } else {
+          user.share.array.delete(pos, delLength)
+        }
+      } else {
+        user.share.array.delete(pos, delLength)
+      }
+    }
+  }
+]
+
+test('y-array: Random tests (42)', async function randomArray42 (t) {
+  await applyRandomTests(t, arrayTransactions, 42)
+})
+
+test('y-array: Random tests (43)', async function randomArray43 (t) {
+  await applyRandomTests(t, arrayTransactions, 43)
+})
+
+test('y-array: Random tests (44)', async function randomArray44 (t) {
+  await applyRandomTests(t, arrayTransactions, 44)
+})
+
+test('y-array: Random tests (45)', async function randomArray45 (t) {
+  await applyRandomTests(t, arrayTransactions, 45)
+})
+
+test('y-array: Random tests (46)', async function randomArray46 (t) {
+  await applyRandomTests(t, arrayTransactions, 46)
+})
+
+test('y-array: Random tests (47)', async function randomArray47 (t) {
+  await applyRandomTests(t, arrayTransactions, 47)
+})
+
+/*
+test('y-array: Random tests (200)', async function randomArray200 (t) {
+  await applyRandomTests(t, arrayTransactions, 200)
+})
+
+test('y-array: Random tests (300)', async function randomArray300 (t) {
+  await applyRandomTests(t, arrayTransactions, 300)
+})
+
+test('y-array: Random tests (400)', async function randomArray400 (t) {
+  await applyRandomTests(t, arrayTransactions, 400)
+})
+
+test('y-array: Random tests (500)', async function randomArray500 (t) {
+  await applyRandomTests(t, arrayTransactions, 500)
+})
+*/

test/y-map.tests.js

@@ -0,0 +1,371 @@
+import { initArrays, compareUsers, Y, flushAll, applyRandomTests } from '../tests-lib/helper.js'
+import { test, proxyConsole } from 'cutest'
+
+proxyConsole()
+
+test('basic map tests', async function map0 (t) {
+  let { users, map0, map1, map2 } = await initArrays(t, { users: 3 })
+  users[2].disconnect()
+
+  map0.set('number', 1)
+  map0.set('string', 'hello Y')
+  map0.set('object', { key: { key2: 'value' } })
+  map0.set('y-map', Y.Map)
+  let map = map0.get('y-map')
+  map.set('y-array', Y.Array)
+  let array = map.get('y-array')
+  array.insert(0, [0])
+  array.insert(0, [-1])
+
+  t.assert(map0.get('number') === 1, 'client 0 computed the change (number)')
+  t.assert(map0.get('string') === 'hello Y', 'client 0 computed the change (string)')
+  t.compare(map0.get('object'), { key: { key2: 'value' } }, 'client 0 computed the change (object)')
+  t.assert(map0.get('y-map').get('y-array').get(0) === -1, 'client 0 computed the change (type)')
+
+  await users[2].reconnect()
+  await flushAll(t, users)
+
+  t.assert(map1.get('number') === 1, 'client 1 received the update (number)')
+  t.assert(map1.get('string') === 'hello Y', 'client 1 received the update (string)')
+  t.compare(map1.get('object'), { key: { key2: 'value' } }, 'client 1 received the update (object)')
+  t.assert(map1.get('y-map').get('y-array').get(0) === -1, 'client 1 received the update (type)')
+
+  // compare disconnected user
+  t.assert(map2.get('number') === 1, 'client 2 received the update (number) - was disconnected')
+  t.assert(map2.get('string') === 'hello Y', 'client 2 received the update (string) - was disconnected')
+  t.compare(map2.get('object'), { key: { key2: 'value' } }, 'client 2 received the update (object) - was disconnected')
+  t.assert(map2.get('y-map').get('y-array').get(0) === -1, 'client 2 received the update (type) - was disconnected')
+  await compareUsers(t, users)
+})
+
+test('Basic get&set of Map property (converge via sync)', async function map1 (t) {
+  let { users, map0 } = await initArrays(t, { users: 2 })
+  map0.set('stuff', 'stuffy')
+  t.compare(map0.get('stuff'), 'stuffy')
+
+  await flushAll(t, users)
+
+  for (let user of users) {
+    var u = user.share.map
+    t.compare(u.get('stuff'), 'stuffy')
+  }
+  await compareUsers(t, users)
+})
+
+test('Map can set custom types (Map)', async function map2 (t) {
+  let { users, map0 } = await initArrays(t, { users: 2 })
+  var map = map0.set('Map', Y.Map)
+  map.set('one', 1)
+  map = map0.get('Map')
+  t.compare(map.get('one'), 1)
+  await compareUsers(t, users)
+})
+
+test('Map can set custom types (Map) - get also returns the type', async function map3 (t) {
+  let { users, map0 } = await initArrays(t, { users: 2 })
+  map0.set('Map', Y.Map)
+  var map = map0.get('Map')
+  map.set('one', 1)
+  map = map0.get('Map')
+  t.compare(map.get('one'), 1)
+  await compareUsers(t, users)
+})
+
+test('Map can set custom types (Array)', async function map4 (t) {
+  let { users, map0 } = await initArrays(t, { users: 2 })
+  var array = map0.set('Array', Y.Array)
+  array.insert(0, [1, 2, 3])
+  array = map0.get('Array')
+  t.compare(array.toArray(), [1, 2, 3])
+  await compareUsers(t, users)
+})
+
+test('Basic get&set of Map property (converge via update)', async function map5 (t) {
+  let { users, map0 } = await initArrays(t, { users: 2 })
+  map0.set('stuff', 'stuffy')
+  t.compare(map0.get('stuff'), 'stuffy')
+
+  await flushAll(t, users)
+
+  for (let user of users) {
+    var u = user.share.map
+    t.compare(u.get('stuff'), 'stuffy')
+  }
+  await compareUsers(t, users)
+})
+
+test('Basic get&set of Map property (handle conflict)', async function map6 (t) {
+  let { users, map0, map1 } = await initArrays(t, { users: 3 })
+  map0.set('stuff', 'c0')
+  map1.set('stuff', 'c1')
+
+  await flushAll(t, users)
+
+  for (let user of users) {
+    var u = user.share.map
+    t.compare(u.get('stuff'), 'c0')
+  }
+  await compareUsers(t, users)
+})
+
+test('Basic get&set&delete of Map property (handle conflict)', async function map7 (t) {
+  let { users, map0, map1 } = await initArrays(t, { users: 3 })
+  map0.set('stuff', 'c0')
+  map0.delete('stuff')
+  map1.set('stuff', 'c1')
+  await flushAll(t, users)
+  for (let user of users) {
+    var u = user.share.map
+    t.assert(u.get('stuff') === undefined)
+  }
+  await compareUsers(t, users)
+})
+
+test('Basic get&set of Map property (handle three conflicts)', async function map8 (t) {
+  let { users, map0, map1, map2 } = await initArrays(t, { users: 3 })
+  map0.set('stuff', 'c0')
+  map1.set('stuff', 'c1')
+  map1.set('stuff', 'c2')
+  map2.set('stuff', 'c3')
+  await flushAll(t, users)
+  for (let user of users) {
+    var u = user.share.map
+    t.compare(u.get('stuff'), 'c0')
+  }
+  await compareUsers(t, users)
+})
+
+test('Basic get&set&delete of Map property (handle three conflicts)', async function map9 (t) {
+  let { users, map0, map1, map2, map3 } = await initArrays(t, { users: 4 })
+  map0.set('stuff', 'c0')
+  map1.set('stuff', 'c1')
+  map1.set('stuff', 'c2')
+  map2.set('stuff', 'c3')
+  await flushAll(t, users)
+  map0.set('stuff', 'deleteme')
+  map0.delete('stuff')
+  map1.set('stuff', 'c1')
+  map2.set('stuff', 'c2')
+  map3.set('stuff', 'c3')
+  await flushAll(t, users)
+  for (let user of users) {
+    var u = user.share.map
+    t.assert(u.get('stuff') === undefined)
+  }
+  await compareUsers(t, users)
+})
+
+test('observePath properties', async function map10 (t) {
+  let { users, map0, map1, map2 } = await initArrays(t, { users: 3 })
+  let map
+  map0.observePath(['map'], function (map) {
+    if (map != null) {
+      map.set('yay', 4)
+    }
+  })
+  map1.set('map', Y.Map)
+  await flushAll(t, users)
+  map = map2.get('map')
+  t.compare(map.get('yay'), 4)
+  await compareUsers(t, users)
+})
+
+test('observe deep properties', async function map11 (t) {
+  let { users, map1, map2, map3 } = await initArrays(t, { users: 4 })
+  var _map1 = map1.set('map', Y.Map)
+  var calls = 0
+  var dmapid
+  _map1.observe(function (event) {
+    calls++
+    t.compare(event.name, 'deepmap')
+    dmapid = event.object.opContents.deepmap
+  })
+  await flushAll(t, users)
+  var _map3 = map3.get('map')
+  _map3.set('deepmap', Y.Map)
+  await flushAll(t, users)
+  var _map2 = map2.get('map')
+  _map2.set('deepmap', Y.Map)
+  await flushAll(t, users)
+  var dmap1 = _map1.get('deepmap')
+  var dmap2 = _map2.get('deepmap')
+  var dmap3 = _map3.get('deepmap')
+  t.assert(calls > 0)
+  t.compare(dmap1._model, dmap2._model)
+  t.compare(dmap1._model, dmap3._model)
+  t.compare(dmap1._model, dmapid)
+  await compareUsers(t, users)
+})
+
+test('observes using observePath', async function map12 (t) {
+  let { users, map0 } = await initArrays(t, { users: 2 })
+  var pathes = []
+  var calls = 0
+  map0.observeDeep(function (event) {
+    pathes.push(event.path)
+    calls++
+  })
+  map0.set('map', Y.Map)
+  map0.get('map').set('array', Y.Array)
+  map0.get('map').get('array').insert(0, ['content'])
+  t.assert(calls === 3)
+  t.compare(pathes, [[], ['map'], ['map', 'array']])
+  await compareUsers(t, users)
+})
+
+function compareEvent (t, is, should) {
+  for (var key in should) {
+    t.assert(should[key] === is[key])
+  }
+}
+
+test('throws add & update & delete events (with type and primitive content)', async function map13 (t) {
+  let { users, map0 } = await initArrays(t, { users: 2 })
+  var event
+  await flushAll(t, users)
+  map0.observe(function (e) {
+    event = e // just put it on event, should be thrown synchronously anyway
+  })
+  map0.set('stuff', 4)
+  compareEvent(t, event, {
+    type: 'add',
+    object: map0,
+    name: 'stuff'
+  })
+  // update, oldValue is in contents
+  map0.set('stuff', Y.Array)
+  compareEvent(t, event, {
+    type: 'update',
+    object: map0,
+    name: 'stuff',
+    oldValue: 4
+  })
+  var replacedArray = map0.get('stuff')
+  // update, oldValue is in opContents
+  map0.set('stuff', 5)
+  var array = event.oldValue
+  t.compare(array._model, replacedArray._model)
+  // delete
+  map0.delete('stuff')
+  compareEvent(t, event, {
+    type: 'delete',
+    name: 'stuff',
+    object: map0,
+    oldValue: 5
+  })
+  await compareUsers(t, users)
+})
+
+test('event has correct value when setting a primitive on a YMap (same user)', async function map14 (t) {
+  let { users, map0 } = await initArrays(t, { users: 3 })
+  var event
+  await flushAll(t, users)
+  map0.observe(function (e) {
+    event = e
+  })
+  map0.set('stuff', 2)
+  t.compare(event.value, event.object.get(event.name))
+  await compareUsers(t, users)
+})
+
+test('event has correct value when setting a primitive on a YMap (received from another user)', async function map15 (t) {
+  let { users, map0, map1 } = await initArrays(t, { users: 3 })
+  var event
+  await flushAll(t, users)
+  map0.observe(function (e) {
+    event = e
+  })
+  map1.set('stuff', 2)
+  await flushAll(t, users)
+  t.compare(event.value, event.object.get(event.name))
+  await compareUsers(t, users)
+})
+
+test('event has correct value when setting a type on a YMap (same user)', async function map16 (t) {
+  let { users, map0 } = await initArrays(t, { users: 3 })
+  var event
+  await flushAll(t, users)
+  map0.observe(function (e) {
+    event = e
+  })
+  map0.set('stuff', Y.Map)
+  t.compare(event.value._model, event.object.get(event.name)._model)
+  await compareUsers(t, users)
+})
+
+test('event has correct value when setting a type on a YMap (ops received from another user)', async function map17 (t) {
+  let { users, map0, map1 } = await initArrays(t, { users: 3 })
+  var event
+  await flushAll(t, users)
+  map0.observe(function (e) {
+    event = e
+  })
+  map1.set('stuff', Y.Map)
+  await flushAll(t, users)
+  t.compare(event.value._model, event.object.get(event.name)._model)
+  await compareUsers(t, users)
+})
+
+var mapTransactions = [
+  function set (t, user, chance) {
+    let key = chance.pickone(['one', 'two'])
+    var value = chance.string()
+    user.share.map.set(key, value)
+  },
+  function setType (t, user, chance) {
+    let key = chance.pickone(['one', 'two'])
+    var value = chance.pickone([Y.Array, Y.Map])
+    let type = user.share.map.set(key, value)
+    if (value === Y.Array) {
+      type.insert(0, [1, 2, 3, 4])
+    } else {
+      type.set('deepkey', 'deepvalue')
+    }
+  },
+  function _delete (t, user, chance) {
+    let key = chance.pickone(['one', 'two'])
+    user.share.map.delete(key)
+  }
+]
+
+test('y-map: Random tests (42)', async function randomMap42 (t) {
+  await applyRandomTests(t, mapTransactions, 42)
+})
+
+test('y-map: Random tests (43)', async function randomMap43 (t) {
+  await applyRandomTests(t, mapTransactions, 43)
+})
+
+test('y-map: Random tests (44)', async function randomMap44 (t) {
+  await applyRandomTests(t, mapTransactions, 44)
+})
+
+test('y-map: Random tests (45)', async function randomMap45 (t) {
+  await applyRandomTests(t, mapTransactions, 45)
+})
+
+test('y-map: Random tests (46)', async function randomMap46 (t) {
+  await applyRandomTests(t, mapTransactions, 46)
+})
+
+test('y-map: Random tests (47)', async function randomMap47 (t) {
+  await applyRandomTests(t, mapTransactions, 47)
+})
+
+/*
+test('y-map: Random tests (200)', async function randomMap200 (t) {
+  await applyRandomTests(t, mapTransactions, 200)
+})
+
+test('y-map: Random tests (300)', async function randomMap300 (t) {
+  await applyRandomTests(t, mapTransactions, 300)
+})
+
+test('y-map: Random tests (400)', async function randomMap400 (t) {
+  await applyRandomTests(t, mapTransactions, 400)
+})
+
+test('y-map: Random tests (500)', async function randomMap500 (t) {
+  await applyRandomTests(t, mapTransactions, 500)
+})
+*/

tests-lib/helper.js

@@ -12,6 +12,9 @@ export let Y = _Y
 
 Y.extend(yMemory, yArray, yMap, yTest)
 
+export var database = { name: 'memory' }
+export var connector = { name: 'test', url: 'http://localhost:1234' }
+
 function * getStateSet () {
   var ss = {}
   yield * this.ss.iterate(this, null, null, function * (n) {
@@ -60,7 +63,16 @@ export async function compareUsers (t, users) {
   await wait()
   await flushAll(t, users)
 
-  var userTypeContents = users.map(u => u.share.array._content.map(c => c.val || JSON.stringify(c.type)))
+  var userArrayValues = users.map(u => u.share.array._content.map(c => c.val || JSON.stringify(c.type)))
+  function valueToComparable (v) {
+    if (v != null && v._model != null) {
+      return v._model
+    } else {
+      return v || null
+    }
+  }
+  var userMapOneValues = users.map(u => u.share.map.get('one')).map(valueToComparable)
+  var userMapTwoValues = users.map(u => u.share.map.get('two')).map(valueToComparable)
 
   await users[0].db.garbageCollect()
   await users[0].db.garbageCollect()
@@ -118,7 +130,9 @@ export async function compareUsers (t, users) {
   }))
   for (var i = 0; i < data.length - 1; i++) {
     await t.asyncGroup(async () => {
-      t.compare(userTypeContents[i], userTypeContents[i + 1], 'types')
+      t.compare(userArrayValues[i], userArrayValues[i + 1], 'array types')
+      t.compare(userMapOneValues[i], userMapOneValues[i + 1], 'map types (propery "one")')
+      t.compare(userMapTwoValues[i], userMapTwoValues[i + 1], 'map types (propery "two")')
       t.compare(data[i].os, data[i + 1].os, 'os')
       t.compare(data[i].ds, data[i + 1].ds, 'ds')
       t.compare(data[i].ss, data[i + 1].ss, 'ss')
@@ -135,17 +149,17 @@ export async function initArrays (t, opts) {
   }
   var share = Object.assign({ flushHelper: 'Map', array: 'Array', map: 'Map' }, opts.share)
   var chance = opts.chance || new Chance(t.getSeed() * 1000000000)
-  var connector = Object.assign({ room: 'debugging_' + t.name, generateUserId: false, testContext: t, chance }, opts.connector)
+  var conn = Object.assign({ room: 'debugging_' + t.name, generateUserId: false, testContext: t, chance }, connector)
   for (let i = 0; i < opts.users; i++) {
     let dbOpts
     let connOpts
     if (i === 0) {
       // Only one instance can gc!
-      dbOpts = Object.assign({ gc: true }, opts.db)
+      dbOpts = Object.assign({ gc: false }, database)
-      connOpts = Object.assign({ role: 'master' }, connector)
+      connOpts = Object.assign({ role: 'master' }, conn)
     } else {
-      dbOpts = Object.assign({ gc: false }, opts.db)
+      dbOpts = Object.assign({ gc: false }, database)
-      connOpts = Object.assign({ role: 'slave' }, connector)
+      connOpts = Object.assign({ role: 'slave' }, conn)
     }
     let y = await Y({
       connector: connOpts,
@@ -220,3 +234,48 @@ export function wait (t) {
     setTimeout(resolve, t != null ? t : 100)
   })
 }
+
+export async function applyRandomTests (t, mods, iterations) {
+  const chance = new Chance(t.getSeed() * 1000000000)
+  var initInformation = await initArrays(t, { users: 5, chance: chance })
+  let { users } = initInformation
+  for (var i = 0; i < iterations; i++) {
+    if (chance.bool({likelihood: 10})) {
+      // 10% chance to disconnect/reconnect a user
+      // we make sure that the first users always is connected
+      let user = chance.pickone(users.slice(1))
+      if (user.connector.isSynced) {
+        if (users.filter(u => u.connector.isSynced).length > 1) {
+          // make sure that at least one user remains in the room
+          await user.disconnect()
+          if (users[0].connector.testRoom == null) {
+            await wait(100)
+          }
+        }
+      } else {
+        await user.reconnect()
+        if (users[0].connector.testRoom == null) {
+          await wait(100)
+        }
+        await new Promise(function (resolve) {
+          user.connector.whenSynced(resolve)
+        })
+      }
+    } else if (chance.bool({likelihood: 5})) {
+      // 20%*!prev chance to flush all & garbagecollect
+      // TODO: We do not gc all users as this does not work yet
+      // await garbageCollectUsers(t, users)
+      await flushAll(t, users)
+      await users[0].db.emptyGarbageCollector()
+      await flushAll(t, users)
+    } else if (chance.bool({likelihood: 10})) {
+      // 20%*!prev chance to flush some operations
+      await flushSome(t, users)
+    }
+    let user = chance.pickone(users)
+    var test = chance.pickone(mods)
+    test(t, user, chance)
+  }
+  await compareUsers(t, users)
+  return initInformation
+}