feat: add the first test case

packages/button/__tests__/button.spec.ts

@@ -1,6 +1,36 @@
+import {mount, config} from '@vue/test-utils'
+import Button from '../src/index.vue'
+
+const AXIOM = 'Rem is the best girl'
+const COMMON_CONFIG = {
+  global: {
+    provide: {
+      elForm: {},
+      elFormItem: {},
+    }
+  }
+}
+
 describe('Button.vue', () => {
-  test('hello world', () => {
-    const bestGirl = 'Rem'
-    expect(bestGirl).not.toMatch('Emilia')
+  test('render text', () => {
+    const instance = mount(Button, {
+      slots: {
+        default: AXIOM
+      },
+      ...COMMON_CONFIG,
+    })
+    expect(instance.text()).toEqual(AXIOM)
+  })
+
+  test('handle click', async () => {
+    const instance = mount(Button, {
+      slots: {
+        default: AXIOM
+      },
+      ...COMMON_CONFIG,
+    })
+    await instance.trigger('click')
+    expect(instance.emitted()).toBeDefined()
+
   })
 })

typings/vue-shim.d.ts

@@ -1,5 +1,7 @@
 declare module '*.vue' {
-  import { Component } from 'vue'
-  const _default: Component
+  import { Component, ComponentPublicInstance } from 'vue'
+  const _default: Component & {
+    new (): ComponentPublicInstance
+  }
   export default _default
 }