Fixes after unit test failures:

* New options to db.close({disableAutoOpen}) default: {disableAutoOpen: true} (backward compatible).
* Made db.delete() call close() with options instead of calling db._close()
* resolveDbReady no in dexie-open no matter parallell open calls.

src/classes/dexie/dexie-open.ts

@@ -159,12 +159,8 @@ export function dexieOpen (db: Dexie) {
       }
       return rejection (err);
   }).finally(()=>{
-      if (state.openCanceller === openCanceller) {
-        // Our openCanceller is the same as the one that was set when calling db.open().
-        // This means that we weren't cancelled.
-        state.openComplete = true;
-        resolveDbReady(); // dbReadyPromise is resolved no matter if open() rejects or resolved. It's just to wake up waiters.
-      }
+    state.openComplete = true;
+    resolveDbReady(); // dbReadyPromise is resolved no matter if open() rejects or resolved. It's just to wake up waiters.
   }).then(()=>{
     if (wasCreated) {
       // Propagate full range on primary keys and indexes on all tables now that the DB is ready and opened,

src/classes/dexie/dexie.ts

@@ -181,7 +181,7 @@ export class Dexie implements IDexie {
         console.warn(`Another connection wants to upgrade database '${this.name}'. Closing db now to resume the upgrade.`);
       else
         console.warn(`Another connection wants to delete database '${this.name}'. Closing db now to resume the delete request.`);
-      this._close();
+      this.close({disableAutoOpen: false});
       this._state.openComplete = false;
       // In many web applications, it would be recommended to force window.reload()
       // when this event occurs. To do that, subscribe to the versionchange event
@@ -307,13 +307,12 @@ export class Dexie implements IDexie {
     state.openCanceller = new Promise((_, reject) => {
       state.cancelOpen = reject;
     });
-    state.dbOpenError = null;
   }
 
-  close(): void {
+  close({disableAutoOpen} = {disableAutoOpen: true}): void {
     this._close();
     const state = this._state;
-    this._options.autoOpen = false;
+    if (disableAutoOpen) this._options.autoOpen = false;
     state.dbOpenError = new exceptions.DatabaseClosed();
     if (state.isBeingOpened)
       state.cancelOpen(state.dbOpenError);
@@ -324,7 +323,7 @@ export class Dexie implements IDexie {
     const state = this._state;
     return new Promise((resolve, reject) => {
       const doDelete = () => {
-        this._close();
+        this.close({disableAutoOpen: false});
         var req = this._deps.indexedDB.deleteDatabase(this.name);
         req.onsuccess = wrap(() => {
           _onDatabaseDeleted(this._deps, this.name);

src/public/types/dexie.d.ts

@@ -95,7 +95,7 @@ export interface Dexie {
     scope: (trans: TXWithTables<this>) => PromiseLike<U> | U
   ): PromiseExtended<U>;
 
-  close(): void;
+  close(closeOptions?: {disableAutoOpen: boolean}): void;
 
   delete(): PromiseExtended<void>;