From 9bccd9dda34cbd901fb35a4f441249650c66cc47 Mon Sep 17 00:00:00 2001
From: hareku <hareku908@gmail.com>
Date: Thu, 20 Feb 2020 12:55:41 +0900
Subject: [PATCH] test(reactivity): test for ref without init value

---
 packages/reactivity/__tests__/ref.spec.ts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/packages/reactivity/__tests__/ref.spec.ts b/packages/reactivity/__tests__/ref.spec.ts
index b822e801bbf..84f1c8dff5a 100644
--- a/packages/reactivity/__tests__/ref.spec.ts
+++ b/packages/reactivity/__tests__/ref.spec.ts
@@ -33,6 +33,17 @@ describe('reactivity/ref', () => {
     expect(dummy).toBe(2)
   })
 
+  it('should work without initial value', () => {
+    const a = ref()
+    let dummy
+    effect(() => {
+      dummy = a.value
+    })
+    expect(dummy).toBe(undefined)
+    a.value = 2
+    expect(dummy).toBe(2)
+  })
+
   it('should work like a normal property when nested in a reactive object', () => {
     const a = ref(1)
     const obj = reactive({