fix(watch): fix watching reactive array (#1656)

fixes #1655
2020-07-21 00:39:22 +08:00
parent d39c03771b
commit 288b4eab9e
2 changed files with 16 additions and 6 deletions
--- a/packages/runtime-core/tests/apiWatch.spec.ts
+++ b/packages/runtime-core/tests/apiWatch.spec.ts
@@ -69,6 +69,16 @@ describe('api: watch', () => {
    expect(dummy).toMatchObject([1, 0])
  })

+  it('watching single source: array', async () => {
+    const array = reactive([] as number[])
+    const spy = jest.fn()
+    watch(array, spy)
+    array.push(1)
+    await nextTick()
+    expect(spy).toBeCalledTimes(1)
+    expect(spy).toBeCalledWith([1], expect.anything(), expect.anything())
+  })
+
  it('watching single source: computed ref', async () => {
    const count = ref(0)
    const plus = computed(() => count.value + 1)