Dev/ut (#205)

fix: 完善单测

Author: livehigh

index.d.ts

@@ -2081,8 +2081,9 @@ declare class COS {
 
   // 实例方法
   /** 获取用户的 bucket 列表 @see https://cloud.tencent.com/document/product/436/8291 */
+  getService(callback: (err: COS.CosError, data: COS.GetServiceResult) => void): void;
   getService(params: COS.GetServiceParams, callback: (err: COS.CosError, data: COS.GetServiceResult) => void): void;
-  getService(params: COS.GetServiceParams): Promise<COS.GetServiceResult>;
+  getService(params?: COS.GetServiceParams): Promise<COS.GetServiceResult>;
 
   /** 创建 Bucket，并初始化访问权限 @see https://cloud.tencent.com/document/product/436/7738 */
   putBucket(params: COS.PutBucketParams, callback: (err: COS.CosError, data: COS.PutBucketResult) => void): void;

sdk/base.js

@@ -14,10 +14,6 @@ var fs = require('fs');
  * @param  {Function}  callback     回调函数，必须
  */
 function getService(params, callback) {
-  if (typeof params === 'function') {
-    callback = params;
-    params = {};
-  }
   var protocol = this.options.Protocol || (util.isBrowser && location.protocol === 'http:' ? 'http:' : 'https:');
   var domain = this.options.ServiceDomain;
   var appId = params.AppId || this.options.appId;