[Improvement] Rebuild test system (#1051)

packages/tree-select/test/__snapshots__/index.spec.js.snap

@@ -0,0 +1,64 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`empty list 1`] = `
+<div class="van-tree-select" style="height: 0px;">
+  <div class="van-tree-select__nav"></div>
+  <div class="van-tree-select__content" style="height: 0px;"></div>
+</div>
+`;
+
+exports[`renders tree-select correctly 1`] = `
+<div>
+  <div>
+    <div class="van-tree-select" style="height:300px;">
+      <div class="van-tree-select__nav">
+        <div class="van-ellipsis van-tree-select__nitem van-tree-select__nitem--active">
+          所有城市
+        </div>
+        <div class="van-ellipsis van-tree-select__nitem">
+          浙江
+        </div>
+        <div class="van-ellipsis van-tree-select__nitem">
+          江苏
+        </div>
+      </div>
+      <div class="van-tree-select__content" style="height:300px;">
+        <div class="van-ellipsis van-tree-select__item van-tree-select__item--active">
+          杭州
+          <i class="van-icon van-icon-success van-tree-select__selected" style="color:undefined;">
+            <!---->
+          </i>
+        </div>
+        <div class="van-ellipsis van-tree-select__item">
+          温州
+          <!---->
+        </div>
+        <div class="van-ellipsis van-tree-select__item">
+          宁波
+          <!---->
+        </div>
+        <div class="van-ellipsis van-tree-select__item">
+          义乌
+          <!---->
+        </div>
+        <div class="van-ellipsis van-tree-select__item">
+          无锡
+          <!---->
+        </div>
+        <div class="van-ellipsis van-tree-select__item">
+          常州
+          <!---->
+        </div>
+        <div class="van-ellipsis van-tree-select__item">
+          莆田
+          <!---->
+        </div>
+        <div class="van-ellipsis van-tree-select__item">
+          三明
+          <!---->
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+`;

packages/tree-select/test/index.spec.js

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+import TreeSelect from '../';
+import demoTest from '../../../test/demo-test';
+import { mount } from '@vue/test-utils';
+
+demoTest(TreeSelect);
+
+test('empty list', () => {
+  expect(mount(TreeSelect).html()).toMatchSnapshot();
+});
+
+test('select item', () => {
+  const item = {
+    text: 'city1',
+    id: 1
+  };
+  const wrapper = mount(TreeSelect, {
+    propsData: {
+      items: [{
+        text: 'group1',
+        children: [item]
+      }]
+    }
+  });
+
+  wrapper.find('.van-tree-select__item').trigger('click');
+  expect(wrapper.emitted('itemclick')[0][0]).toEqual(item);
+});