From 33615be1e9acefeefb185722e175a9af19acfeaa Mon Sep 17 00:00:00 2001
From: David Maskasky <dmaskasky@gmail.com>
Date: Fri, 15 Nov 2024 17:08:10 -0800
Subject: [PATCH] atom.write getter does not add dependencies to dependents

---
 tests/vanilla/store.test.tsx | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tests/vanilla/store.test.tsx b/tests/vanilla/store.test.tsx
index 9905909ea8a..3ad51addc65 100644
--- a/tests/vanilla/store.test.tsx
+++ b/tests/vanilla/store.test.tsx
@@ -896,3 +896,15 @@ it('throws falsy errors in onMount, onUnmount, and listeners', () => {
   })
   expect(() => store.set(c, 1)).toThrow('')
 })
+
+it('does not update dependencies when accessed with write get', () => {
+  const store = createStore()
+  const a = atom(0)
+  const bRead = vi.fn((get) => get(a))
+  const b = atom(bRead)
+  const w = atom(null, (get) => get(b))
+  store.set(w)
+  bRead.mockClear()
+  store.set(a, 1)
+  expect(bRead).not.toHaveBeenCalled() // fails
+})