add internals file and use it to organize imports

tests/index.js

@@ -1,12 +1,13 @@
 
-import { runTests } from 'lib0/testing.js'
-import { isBrowser } from 'lib0/environment.js'
-import * as log from 'lib0/logging.js'
 import * as array from './y-array.tests.js'
 import * as map from './y-map.tests.js'
 import * as text from './y-text.tests.js'
 import * as xml from './y-xml.tests.js'
 
+import { runTests } from 'lib0/testing.js'
+import { isBrowser } from 'lib0/environment.js'
+import * as log from 'lib0/logging.js'
+
 if (isBrowser) {
   log.createVConsole(document.body)
 }

tests/testHelper.js

@@ -1,13 +1,18 @@
 import * as Y from '../src/index.js'
+
+import {
+  createDeleteSetFromStructStore,
+  getStates,
+  AbstractItem,
+  DeleteSet, StructStore // eslint-disable-line
+} from '../src/internals.js'
+
 import * as t from 'lib0/testing.js'
 import * as prng from 'lib0/prng.js'
 import { createMutex } from 'lib0/mutex.js'
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
 import * as syncProtocol from 'y-protocols/sync.js'
-import { createDeleteSetFromStructStore, DeleteSet } from '../src/utils/DeleteSet.js' // eslint-disable-line
-import { getStates, StructStore } from '../src/utils/StructStore.js' // eslint-disable-line
-import { AbstractItem } from '../src/structs/AbstractItem.js' // eslint-disable-line
 
 /**
  * @param {TestYInstance} y
@@ -278,9 +283,6 @@ export const compare = users => {
     compareDS(createDeleteSetFromStructStore(users[i].store), createDeleteSetFromStructStore(users[i + 1].store))
     compareStructStores(users[i].store, users[i + 1].store)
   }
-  users.forEach(user =>
-    t.assert(user._missingStructs.size === 0)
-  )
   users.map(u => u.destroy())
 }
 

tests/y-array.tests.js

@@ -1,4 +1,5 @@
 import { init, compare, applyRandomTests, TestYInstance } from './testHelper.js' // eslint-disable-line
+
 import * as Y from '../src/index.js'
 import * as t from 'lib0/testing.js'
 import * as prng from 'lib0/prng.js'

tests/y-map.tests.js

@@ -1,4 +1,5 @@
 import { init, compare, applyRandomTests, TestYInstance } from './testHelper.js' // eslint-disable-line
+
 import * as Y from '../src/index.js'
 import * as t from 'lib0/testing.js'
 import * as prng from 'lib0/prng.js'

tests/y-text.tests.js

@@ -1,4 +1,5 @@
 import { init, compare } from './testHelper.js'
+
 import * as t from 'lib0/testing.js'
 
 /**

tests/y-xml.tests.js

@@ -1,5 +1,6 @@
 import { init, compare } from './testHelper.js'
 import * as Y from '../src/index.js'
+
 import * as t from 'lib0/testing.js'
 
 /**