[improvement] Badge: add change event (#2017)

packages/badge/test/index.spec.js

@@ -2,11 +2,12 @@ import { mount } from '../../../test/utils';
 import Badge from '../';
 import BadgeGroup from '../../badge-group';
 
-test('click', () => {
+test('event', () => {
   const onClick = jest.fn();
+  const onChange = jest.fn();
   const wrapper = mount({
     template: `
-      <badge-group>
+      <badge-group @change="onChange">
         <badge @click="onClick">Text</badge>
       </badge-group>
     `,
@@ -15,10 +16,24 @@ test('click', () => {
       BadgeGroup
     },
     methods: {
-      onClick
+      onClick,
+      onChange
     }
   });
 
   wrapper.find('.van-badge').trigger('click');
   expect(onClick.mock.calls[0][0]).toBe(0);
+  expect(onChange.mock.calls[0][0]).toBe(0);
+  wrapper.vm.$destroy();
+});
+
+test('without parent', () => {
+  const consoleError = console.error;
+  try {
+    console.error = jest.fn();
+    mount(Badge);
+  } catch (err) {
+    console.error = consoleError;
+    expect(err).toBeTruthy();
+  }
 });