From 848ccf56fb55149728055ef21eed133a4503a5d9 Mon Sep 17 00:00:00 2001
From: izayl <izayl@163.com>
Date: Tue, 15 Sep 2020 22:49:59 +0800
Subject: [PATCH] test(reactive): add test case of mutation in original
 reflecting in observed value (#2118)

---
 packages/reactivity/__tests__/reactive.spec.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/packages/reactivity/__tests__/reactive.spec.ts b/packages/reactivity/__tests__/reactive.spec.ts
index a7c46451d1e..f6fed0230c3 100644
--- a/packages/reactivity/__tests__/reactive.spec.ts
+++ b/packages/reactivity/__tests__/reactive.spec.ts
@@ -113,6 +113,19 @@ describe('reactivity/reactive', () => {
     expect('foo' in original).toBe(false)
   })
 
+  test('original value change should reflect in observed value (Object)', () => {
+    const original: any = { foo: 1 }
+    const observed = reactive(original)
+    // set
+    original.bar = 1
+    expect(original.bar).toBe(1)
+    expect(observed.bar).toBe(1)
+    // delete
+    delete original.foo
+    expect('foo' in original).toBe(false)
+    expect('foo' in observed).toBe(false)
+  })
+
   test('setting a property with an unobserved value should wrap with reactive', () => {
     const observed = reactive<{ foo?: object }>({})
     const raw = {}