From f3a732f86fbd0399f7b7ebc6a762a2425d08bb4c Mon Sep 17 00:00:00 2001
From: Eduardo San Martin Morote <posva13@gmail.com>
Date: Wed, 29 Sep 2021 11:34:04 +0200
Subject: [PATCH] fix: use assign to set $state

Fix #682
---
 packages/pinia/__tests__/store.spec.ts | 7 +++++++
 packages/pinia/src/store.ts            | 4 +++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/packages/pinia/__tests__/store.spec.ts b/packages/pinia/__tests__/store.spec.ts
index 34c89e48..82592688 100644
--- a/packages/pinia/__tests__/store.spec.ts
+++ b/packages/pinia/__tests__/store.spec.ts
@@ -137,6 +137,11 @@ describe('Store', () => {
 
   it('can replace its state', () => {
     const store = useStore()
+    const spy = jest.fn()
+    watch(() => store.a, spy, { flush: 'sync' })
+    expect(store.a).toBe(true)
+
+    expect(spy).toHaveBeenCalledTimes(0)
     // TODO: remove once plugin state achieve generics
     // @ts-expect-error
     store.$state = {
@@ -148,6 +153,8 @@ describe('Store', () => {
         },
       },
     }
+    expect(spy).toHaveBeenCalledTimes(1)
+
     expect(store.$state).toEqual({
       a: false,
       nested: {
diff --git a/packages/pinia/src/store.ts b/packages/pinia/src/store.ts
index 06f7cc6e..1082d91b 100644
--- a/packages/pinia/src/store.ts
+++ b/packages/pinia/src/store.ts
@@ -532,7 +532,9 @@ function createSetupStore<
       if (__DEV__ && hot) {
         throw new Error('cannot set hotState')
       }
-      pinia.state.value[$id] = state
+      $patch(($state) => {
+        assign($state, state)
+      })
     },
   })
 
-- 
2.47.3