test(container): add test init

packages/container/__tests__/container.spec.ts

@@ -1,5 +1,9 @@
 import { mount } from '@vue/test-utils'
 import Container from '../src/container.vue'
+import Header from '../src/header.vue'
+import Main from '../src/main.vue'
+import Aside from '../src/aside.vue'
+import Footer from '../src/footer.vue'
 
 const AXIOM = 'Rem is the best girl'
 
@@ -13,3 +17,31 @@ describe('Container.vue', () => {
     expect(wrapper.text()).toEqual(AXIOM)
   })
 })
+
+describe('Header', () => {
+  test('create', () => {
+    const wrapper = mount(Header)
+    expect(wrapper.classes()).toContain('el-header')
+  })
+})
+
+describe('Main', () => {
+  test('create', () => {
+    const wrapper = mount(Main)
+    expect(wrapper.classes()).toContain('el-main')
+  })
+})
+
+describe('Aside', () => {
+  test('create', () => {
+    const wrapper = mount(Aside)
+    expect(wrapper.classes()).toContain('el-aside')
+  })
+})
+
+describe('Footer', () => {
+  test('create', () => {
+    const wrapper = mount(Footer)
+    expect(wrapper.classes()).toContain('el-footer')
+  })
+})