From 75f1ef5369f35e3d84d16652c1181c2edea64292 Mon Sep 17 00:00:00 2001
From: Dominic Gannaway <dg@domgan.com>
Date: Thu, 15 Aug 2024 09:33:26 +0100
Subject: [PATCH] add error preventing setting descriptors that are complex #2

---
 .../svelte/src/internal/client/proxy.test.ts   | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/packages/svelte/src/internal/client/proxy.test.ts b/packages/svelte/src/internal/client/proxy.test.ts
index 9786ad0acbbb..c549f87935cc 100644
--- a/packages/svelte/src/internal/client/proxy.test.ts
+++ b/packages/svelte/src/internal/client/proxy.test.ts
@@ -35,7 +35,7 @@ test('preserves getters', () => {
 });
 
 test('defines a property', () => {
-	const original = {};
+	const original = { y: 0 };
 	const state = proxy<any>(original);
 
 	let value = 0;
@@ -43,9 +43,25 @@ test('defines a property', () => {
 	Object.defineProperty(state, 'x', {
 		value: 1
 	});
+	Object.defineProperty(state, 'y', {
+		value: 1
+	});
 
 	assert.equal(state.x, 1);
+	assert.deepEqual(Object.getOwnPropertyDescriptor(state, 'x'), {
+		configurable: true,
+		writable: true,
+		value: 1,
+		enumerable: true
+	});
+
 	assert.ok(!('x' in original));
+	assert.deepEqual(Object.getOwnPropertyDescriptor(original, 'y'), {
+		configurable: true,
+		writable: true,
+		value: 0,
+		enumerable: true
+	});
 
 	assert.throws(
 		() =>