[Improvement] List: add test cases (#1191)

packages/list/index.vue

@@ -50,12 +50,10 @@ export default create({
   },
 
   activated() {
-    /* istanbul ignore next */
     this.handler(true);
   },
 
   deactivated() {
-    /* istanbul ignore next */
     this.handler(false);
   },
 

packages/list/test/index.spec.js

@@ -0,0 +1,77 @@
+import List from '..';
+import { mount } from '@vue/test-utils';
+
+test('load event', done => {
+  const wrapper = mount(List);
+
+  wrapper.vm.$on('input', value => {
+    wrapper.vm.loading = value;
+  });
+
+  setTimeout(() => {
+    expect(wrapper.emitted('load')).toBeTruthy();
+    expect(wrapper.emitted('input')).toBeTruthy();
+
+    wrapper.vm.loading = false;
+
+    setTimeout(() => {
+      expect(wrapper.emitted('input')[1]).toBeTruthy();
+      wrapper.vm.$destroy();
+      done();
+    });
+  });
+});
+
+test('finished', done => {
+  const wrapper = mount(List, {
+    propsData: {
+      finished: true
+    }
+  });
+
+  setTimeout(() => {
+    expect(wrapper.emitted('load')).toBeFalsy();
+    expect(wrapper.emitted('input')).toBeFalsy();
+    wrapper.vm.finished = false;
+
+    setTimeout(() => {
+      expect(wrapper.emitted('load')).toBeTruthy();
+      expect(wrapper.emitted('input')).toBeTruthy();
+      done();
+    });
+  });
+});
+
+test('immediate check false', done => {
+  const wrapper = mount(List, {
+    propsData: {
+      immediateCheck: false
+    }
+  });
+
+  setTimeout(() => {
+    expect(wrapper.emitted('load')).toBeFalsy();
+    expect(wrapper.emitted('input')).toBeFalsy();
+    done();
+  });
+});
+
+test('keey-alive live cycle', () => {
+  const wrapper = mount({
+    template: `
+      <keep-alive>
+        <list v-if="show" />
+      </keep-alive>
+    `,
+    props: ['show'],
+    components: { List }
+  }, {
+    propsData: {
+      show: true
+    }
+  });
+
+  expect(wrapper.vm.$el).toBeTruthy();
+  wrapper.vm.show = false;
+  expect(wrapper.vm.el).toBeFalsy();
+});