adjust test

packages/svelte/tests/runtime-runes/samples/async-each-controlled-empty-pending/_config.js

@@ -15,15 +15,16 @@ export default test({
 			`
 				<button>startA</button>
 				<button>startB</button>
+				<button>settleA</button>
 				<button>settleB</button>
 				<p>A0/B0</p>
 				<div><span>1</span><span>2</span></div>
 			`
 		);
 
-		const [startA, startB, settleB] = target.querySelectorAll('button');
+		const [startA, startB, settleA, settleB] = target.querySelectorAll('button');
 
-		// Batch A: add key 9, then block forever on gate A.
+		// Batch A: add key 9, then block on gate A.
 		startA.click();
 		await tick();
 
@@ -32,18 +33,31 @@ export default test({
 		await tick();
 
 		// Settle B first so B commits while A is still pending.
-		// Without the fix this throws reading `.e` of undefined and leaves a/b stuck.
 		settleB.click();
 		await tick();
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>startA</button>
+				<button>startB</button>
+				<button>settleA</button>
+				<button>settleB</button>
+				<p>A0/B0</p>
+				<div><span>1</span><span>2</span></div>
+			`
+		);
 
+		settleA.click();
+		await tick();
 		assert.htmlEqual(
 			target.innerHTML,
 			`
 				<button>startA</button>
 				<button>startB</button>
+				<button>settleA</button>
 				<button>settleB</button>
-				<p>A0/B1</p>
-				<div></div>
+				<p>A1/B1</p>
+				<div><span>9</span></div>
 			`
 		);
 	}

packages/svelte/tests/runtime-runes/samples/async-each-controlled-empty-pending/main.svelte

@@ -8,6 +8,8 @@
 	// and are not merged.
 	const items = $derived(extraKey === null ? base : [...base, extraKey]);
 
+	/** @type {((value: string) => void) | undefined} */
+	let resolveA;
 	/** @type {((value: string) => void) | undefined} */
 	let resolveB;
 
@@ -19,7 +21,8 @@
 		n === 0
 			? Promise.resolve(`${name}0`)
 			: new Promise((r) => {
-					if (name === 'B') resolveB = r;
+					if (name === 'A') resolveA = r;
+					else resolveB = r;
 				});
 
 	const a = $derived(await gate('A', tickA));
@@ -34,15 +37,12 @@
 		base = [];
 		tickB = 1;
 	}
-
-	function settleB() {
-		resolveB?.('B1');
-	}
 </script>
 
 <button onclick={startA}>startA</button>
 <button onclick={startB}>startB</button>
-<button onclick={settleB}>settleB</button>
+<button onclick={() => resolveA?.('A1')}>settleA</button>
+<button onclick={() => resolveB?.('B1')}>settleB</button>
 
 <p>{a}/{b}</p>