wip: tests for compiler compat

packages/vue-compat/__tests__/refInfor.spec.ts

@@ -0,0 +1,57 @@
+import Vue from '@vue/compat'
+import { nextTick } from '../../runtime-core/src/scheduler'
+import {
+  DeprecationTypes,
+  deprecationData,
+  toggleDeprecationWarning
+} from '../../runtime-core/src/compat/compatConfig'
+
+beforeEach(() => {
+  toggleDeprecationWarning(true)
+  Vue.configureCompat({
+    MODE: 2,
+    GLOBAL_MOUNT: 'suppress-warning'
+  })
+})
+
+afterEach(() => {
+  toggleDeprecationWarning(false)
+  Vue.configureCompat({ MODE: 3 })
+})
+
+test('V_FOR_REF', async () => {
+  const vm = new Vue({
+    data() {
+      return {
+        ok: true,
+        list: [1, 2, 3]
+      }
+    },
+    template: `
+    <template v-if="ok">
+      <li v-for="i in list" ref="list">{{ i }}</li>
+    </template>
+    `
+  }).$mount() as any
+
+  const mapRefs = () => vm.$refs.list.map((el: HTMLElement) => el.textContent)
+  expect(mapRefs()).toMatchObject(['1', '2', '3'])
+
+  expect(deprecationData[DeprecationTypes.V_FOR_REF].message).toHaveBeenWarned()
+
+  vm.list.push(4)
+  await nextTick()
+  expect(mapRefs()).toMatchObject(['1', '2', '3', '4'])
+
+  vm.list.shift()
+  await nextTick()
+  expect(mapRefs()).toMatchObject(['2', '3', '4'])
+
+  vm.ok = !vm.ok
+  await nextTick()
+  expect(mapRefs()).toMatchObject([])
+
+  vm.ok = !vm.ok
+  await nextTick()
+  expect(mapRefs()).toMatchObject(['2', '3', '4'])
+})