test: add activated and deactivated for testing

packages/runtime-core/__tests__/hmr.spec.ts

@@ -156,6 +156,8 @@ describe('hot module replacement', () => {
     const childId = 'test-child-keep-alive'
     const unmountSpy = jest.fn()
     const mountSpy = jest.fn()
+    const activeSpy = jest.fn()
+    const deactiveSpy = jest.fn()
 
     const Child: ComponentOptions = {
       __hmrId: childId,
@@ -169,24 +171,50 @@ describe('hot module replacement', () => {
 
     const Parent: ComponentOptions = {
       components: { Child },
-      render: compileToFunction(`<KeepAlive><Child/></KeepAlive>`)
+      data() {
+        return { toggle: true }
+      },
+      render: compileToFunction(
+        `<button @click="toggle = !toggle"></button><KeepAlive><Child v-if="toggle" /></KeepAlive>`
+      )
     }
 
     render(h(Parent), root)
-    expect(serializeInner(root)).toBe(`<div>0</div>`)
+    expect(serializeInner(root)).toBe(`<button></button><div>0</div>`)
 
     reload(childId, {
       __hmrId: childId,
       data() {
         return { count: 1 }
       },
       mounted: mountSpy,
+      unmounted: unmountSpy,
+      activated: activeSpy,
+      deactivated: deactiveSpy,
       render: compileToFunction(`<div>{{ count }}</div>`)
     })
     await nextTick()
-    expect(serializeInner(root)).toBe(`<div>1</div>`)
+    expect(serializeInner(root)).toBe(`<button></button><div>1</div>`)
+    expect(unmountSpy).toHaveBeenCalledTimes(1)
+    expect(mountSpy).toHaveBeenCalledTimes(1)
+    expect(activeSpy).toHaveBeenCalledTimes(1)
+    expect(deactiveSpy).toHaveBeenCalledTimes(0)
+
+    // should not unmount when toggling
+    triggerEvent(root.children[1] as TestElement, 'click')
+    await nextTick()
+    expect(unmountSpy).toHaveBeenCalledTimes(1)
+    expect(mountSpy).toHaveBeenCalledTimes(1)
+    expect(activeSpy).toHaveBeenCalledTimes(1)
+    expect(deactiveSpy).toHaveBeenCalledTimes(1)
+
+    // should not mount when toggling
+    triggerEvent(root.children[1] as TestElement, 'click')
+    await nextTick()
     expect(unmountSpy).toHaveBeenCalledTimes(1)
     expect(mountSpy).toHaveBeenCalledTimes(1)
+    expect(activeSpy).toHaveBeenCalledTimes(2)
+    expect(deactiveSpy).toHaveBeenCalledTimes(1)
   })
 
   test('reload class component', async () => {