[improvement] Functional: ContactList, NavBar, Panel, SubmitBar, SwitchCell, Tag (#2675)

packages/submit-bar/test/__snapshots__/index.spec.js.snap

@@ -1,6 +1,6 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`submit 1`] = `
+exports[`disable submit 1`] = `
 <div class="van-submit-bar">
   <div class="van-submit-bar__bar">
     <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 0.00</span></div><button disabled="disabled" class="van-button van-button--danger van-button--large van-button--square van-button--disabled"><span class="van-button__text"></span></button>

packages/submit-bar/test/index.spec.js

@@ -2,10 +2,30 @@ import SubmitBar from '..';
 import { mount } from '../../../test/utils';
 
 test('submit', () => {
+  const submit = jest.fn();
   const wrapper = mount(SubmitBar, {
-    propsData: {
-      price: 0.01,
-      disabled: true
+    context: {
+      props: {
+        price: 0.01
+      },
+      on: { submit }
+    }
+  });
+
+  const button = wrapper.find('.van-button');
+  button.trigger('click');
+  expect(submit.mock.calls[0]).toBeTruthy();
+});
+
+test('disable submit', () => {
+  const submit = jest.fn();
+  const wrapper = mount(SubmitBar, {
+    context: {
+      props: {
+        price: 0.01,
+        disabled: true
+      },
+      on: { submit }
     }
   });
 
@@ -14,10 +34,5 @@ test('submit', () => {
   // disabled
   const button = wrapper.find('.van-button');
   button.trigger('click');
-  expect(wrapper.emitted('submit')).toBeFalsy();
-
-  // submit
-  wrapper.vm.disabled = false;
-  button.trigger('click');
-  expect(wrapper.emitted('submit')).toBeTruthy();
+  expect(submit.mock.calls[0]).toBeFalsy();
 });