test(ActionBarButton): update test cases

src/action-bar-button/test/__snapshots__/index.spec.js.snap

@@ -0,0 +1,10 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`should render default slot and match snapshot 1`] = `
+<button type="button" class="van-button van-button--default van-button--large van-action-bar-button">
+  <div class="van-button__content">
+    <!----><span class="van-button__text">Content</span>
+    <!---->
+  </div>
+</button>
+`;

src/action-bar-button/test/index.spec.js

@@ -0,0 +1,11 @@
+import { mount } from '@vue/test-utils';
+import ActionBarButton from '..';
+
+test('should render default slot and match snapshot', () => {
+  const wrapper = mount(ActionBarButton, {
+    slots: {
+      default: 'Content',
+    },
+  });
+  expect(wrapper.html()).toMatchSnapshot();
+});