add closeDatabase

src/IndexedDBEngine.js

@@ -1,4 +1,4 @@
-import { dbPromise, openDatabase } from './databaseLifecycle'
+import { closeDatabase, dbPromise, openDatabase } from './databaseLifecycle'
 import {
   DATA_VERSION_CURRENT,
   DB_NAME,
@@ -74,4 +74,8 @@ export class IndexedDBEngine {
       emojiStore.get(unicode).onsuccess = e => cb(e.target.result)
     })
   }
+
+  close () {
+    return closeDatabase(DB_NAME)
+  }
 }

src/database.js

@@ -48,3 +48,8 @@ export async function getEmojiByUnicode (unicode) {
   await init()
   return idbEngine.getEmojiByUnicode(unicode)
 }
+
+export async function closeDatabase () {
+  await init()
+  return idbEngine.close()
+}

src/databaseLifecycle.js

@@ -57,12 +57,15 @@ export async function dbPromise (db, storeName, readOnlyOrReadWrite, cb) {
   })
 }
 
-export function closeDatabase (instanceName) {
+export function closeDatabase (dbName) {
+  if (!dbName) {
+    throw new Error('dbName is required')
+  }
   // close any open requests
-  const openReq = openReqs[instanceName]
+  const openReq = openReqs[dbName]
   if (openReq && openReq.result) {
     openReq.result.close()
   }
-  delete openReqs[instanceName]
-  delete databaseCache[instanceName]
+  delete openReqs[dbName]
+  delete databaseCache[dbName]
 }