add test and update webpack config

[new] add test config
[new] add breadcrumb test
[change] update package.json
[new] util.js copied from  element
[unresolved] see test/unit/index.js @todo

test/unit/util.js

@@ -0,0 +1,85 @@
+import Vue from 'vue';
+import iView from '../../src/index';
+
+Vue.use(iView);
+
+let id = 0;
+
+const createElm = function() {
+  const elm = document.createElement('div');
+
+  elm.id = 'app' + ++id;
+  document.body.appendChild(elm);
+
+  return elm;
+};
+
+/**
+ * 回收 vm
+ * @param  {Object} vm
+ */
+exports.destroyVM = function(vm) {
+  vm.$el &&
+  vm.$el.parentNode &&
+  vm.$el.parentNode.removeChild(vm.$el);
+};
+
+/**
+ * 创建一个 Vue 的实例对象
+ * @param  {Object|String}  Compo   组件配置，可直接传 template
+ * @param  {Boolean=false} mounted 是否添加到 DOM 上
+ * @return {Object} vm
+ */
+exports.createVue = function(Compo, mounted = false) {
+  const elm = createElm();
+
+  if (Object.prototype.toString.call(Compo) === '[object String]') {
+    Compo = { template: Compo };
+  }
+  return new Vue(Compo).$mount(mounted === false ? null : elm);
+};
+
+/**
+ * 创建一个测试组件实例
+ * @link http://vuejs.org/guide/unit-testing.html#Writing-Testable-Components
+ * @param  {Object}  Compo          - 组件对象
+ * @param  {Object}  propsData      - props 数据
+ * @param  {Boolean=false} mounted  - 是否添加到 DOM 上
+ * @return {Object} vm
+ */
+exports.createTest = function(Compo, propsData = {}, mounted = false) {
+  if (propsData === true || propsData === false) {
+    mounted = propsData;
+    propsData = {};
+  }
+  const elm = createElm();
+  const Ctor = Vue.extend(Compo);
+  return new Ctor({ propsData }).$mount(mounted === false ? null : elm);
+};
+
+/**
+ * 触发一个事件
+ * mouseenter, mouseleave, mouseover, keyup, change, click 等
+ * @param  {Element} elm
+ * @param  {String} name
+ * @param  {*} opts
+ */
+exports.triggerEvent = function(elm, name, ...opts) {
+  let eventName;
+
+  if (/^mouse|click/.test(name)) {
+    eventName = 'MouseEvents';
+  } else if (/^key/.test(name)) {
+    eventName = 'KeyboardEvent';
+  } else {
+    eventName = 'HTMLEvents';
+  }
+  const evt = document.createEvent(eventName);
+
+  evt.initEvent(name, ...opts);
+  elm.dispatchEvent
+    ? elm.dispatchEvent(evt)
+    : elm.fireEvent('on' + name, evt);
+
+  return elm;
+};