test: 优化 app.component 测试例

pages/app-instance/index/index.test.js

 const PAGE_PATH = '/pages/app-instance/index/index'
 
 describe('app-instance', () => {
-  it('basic', async () => {
+  it('app.component', async () => {
     const page = await program.reLaunch(PAGE_PATH)
     await page.waitFor('view')
     const CompForAppComponent = await page.$('.component-for-app-component')