Implement EventTarget.

Found what appears to be a good working implementation on NPM.

Closes #15.

factory.js

@@ -0,0 +1,28 @@
+const { DBOpenDBRequest } = require('./request')
+
+function createEvent(type, bubbles, cancelable, detail) {
+    return {
+        type,
+        timeStamp: Date.now(),
+        bubbles: bubbles,
+        cancelable: cancelable,
+        detail: detail || null,
+    }
+}
+
+class DBFactory {
+    constructor (path) {
+        console.log(path)
+    }
+
+    open (name, version = 0) {
+        const request = new DBOpenDBRequest()
+        setImmediate(() => {
+            request.dispatchEvent(createEvent('upgradeneeded', false, false))
+            request.dispatchEvent(createEvent('success', false, false))
+        })
+        return request
+    }
+}
+
+exports.DBFactory = DBFactory

index.js

@@ -1 +1,5 @@
-module.exports = 1
+const path = require('path')
+
+const { DBFactory } = require('./factory')
+
+exports.indexedDB = new DBFactory(path.resolve(__dirname, './test/tmp/indexeddb'))

package.json

@@ -23,6 +23,7 @@
     },
     "dependencies":
     {
+                        "event-target-shim":    "5.0.1"
     },
     "devDependencies":
     {

request.js

@@ -0,0 +1,27 @@
+const { EventTarget, defineEventAttribute } = require('event-target-shim')
+
+class DBRequest extends EventTarget {
+    constructor () {
+        super()
+        this.source = null
+        this.transaction = null
+        this.readyState = 'pending'
+        this.onsuccess = null
+        this.onerror = null
+    }
+}
+
+defineEventAttribute(DBRequest.prototype, 'error')
+defineEventAttribute(DBRequest.prototype, 'success')
+
+class DBOpenDBRequest extends DBRequest {
+    constructor () {
+        super()
+    }
+}
+
+defineEventAttribute(DBOpenDBRequest.prototype, 'blocked')
+defineEventAttribute(DBOpenDBRequest.prototype, 'upgradeneeded')
+
+exports.DBRequest = DBRequest
+exports.DBOpenDBRequest = DBOpenDBRequest

test/indexeddb.t.js

@@ -1,5 +1,20 @@
-require('proof')(1, prove)
+require('proof')(1, (okay, callback) => {
+    const { indexedDB } = require('..')
+    okay(indexedDB, 'required')
+    const request = indexedDB.open('test', 3)
+    request.onupgradeneeded = function () {
+        console.log('upgrading')
+        return
+        const db = request.result
+        const store = db.createObjectStore('books', { keyPath: 'isbn' })
+        store.createIndex('by_title', 'title', { unique: true })
 
-function prove (ok) {
-    ok(require('..'), 'require')
-}
+        store.put({ title: 'Quarry Memories', author: 'Fred', isbn: 123456 })
+        store.put({ title: 'Water Buffaloes', author: 'Fred', isbn: 234567 })
+        store.put({ title: 'Bedrock Nights', author: 'Barney', isbn: 345678 })
+    }
+    request.onsuccess = function () {
+        console.log('succeeded')
+    }
+    callback()
+})