refactoring es6 classes

lib/adapter.js

@@ -44,28 +44,24 @@
  *
  * @see {@tutorial client}
  *
- * @returns {PromiseAdapter}
  */
-function PromiseAdapter(create, resolve, reject) {
+class PromiseAdapter {
+    constructor(create, resolve, reject) {
+        this.create = create;
+        this.resolve = resolve;
+        this.reject = reject;
 
-    if (!(this instanceof PromiseAdapter)) {
-        return new PromiseAdapter(create, resolve, reject);
-    }
-
-    this.create = create;
-    this.resolve = resolve;
-    this.reject = reject;
+        if (typeof create !== 'function') {
+            throw new TypeError('Adapter requires a function to create a promise.');
+        }
 
-    if (typeof create !== 'function') {
-        throw new TypeError('Adapter requires a function to create a promise.');
-    }
-
-    if (typeof resolve !== 'function') {
-        throw new TypeError('Adapter requires a function to resolve a promise.');
-    }
+        if (typeof resolve !== 'function') {
+            throw new TypeError('Adapter requires a function to resolve a promise.');
+        }
 
-    if (typeof reject !== 'function') {
-        throw new TypeError('Adapter requires a function to reject a promise.');
+        if (typeof reject !== 'function') {
+            throw new TypeError('Adapter requires a function to reject a promise.');
+        }
     }
 }
 

test/header.js

@@ -3,7 +3,7 @@
 /////////////////////////////////////
 
 function isError(e, name) {
-    var confirmed = e instanceof Error &&
+    let confirmed = e instanceof Error &&
         typeof e === 'object' &&
         typeof e.message === 'string' &&
         typeof e.stack === 'string';