test: test serve inline entry

Author: yyx990803

packages/@vue/cli-service/__tests__/serve.spec.js

@@ -1,4 +1,4 @@
-jest.setTimeout(30000)
+jest.setTimeout(45000)
 
 const { defaultPreset } = require('@vue/cli/lib/options')
 const create = require('@vue/cli-test-utils/createTestProject')
@@ -46,3 +46,29 @@ test('serve with router', async () => {
     }
   )
 })
+
+test('serve with inline entry', async () => {
+  const project = await create('e2e-serve-inline-entry', defaultPreset)
+
+  const path = require('path')
+  const fs = require('fs-extra')
+  await fs.move(
+    path.resolve(project.dir, 'src/main.js'),
+    path.resolve(project.dir, 'src/index.js')
+  )
+
+  await serve(
+    () => project.run('vue-cli-service serve src/index.js'),
+    async ({ nextUpdate, helpers }) => {
+      const msg = `Welcome to Your Vue.js App`
+      expect(await helpers.getText('h1')).toMatch(msg)
+
+      // test hot reload
+      const file = await project.read(`src/App.vue`)
+      project.write(`src/App.vue`, file.replace(msg, `Updated`))
+      await nextUpdate() // wait for child stdout update signal
+      await sleep(1000) // give the client time to update
+      expect(await helpers.getText('h1')).toMatch(`Updated`)
+    }
+  )
+})