fix exclude match failed

Author: WhatAKitty

src/index.js

@@ -71,7 +71,9 @@ class FetchMock {
   isExclude(url) {
     for (let i = 0; i < this.exclude.length; i++) {
       const excludeUrl = this.exclude[i];
-      return excludeUrl === url || (excludeUrl instanceof RegExp && excludeUrl.exec(url) !== null);
+      if (excludeUrl === url || (excludeUrl instanceof RegExp && excludeUrl.exec(url) !== null)) {
+        return true;
+      }
     }
     return false;
   }

test/index.test.js

@@ -5,8 +5,8 @@ import FetchMock, { Mock } from '../';
 const fetch = new FetchMock(require('../__mocks__'), {
   fetch: require('isomorphic-fetch'),
   exclude: [
-    'http://www.baidu.com',
     /^foo(bar)?$/i,
+    /http:\/\/www.baidu.com/,
   ],
 }).fetch;
 describe('test fetch mock', () => {