improve test

packages/svelte/src/internal/client/reactivity/deriveds.js

@@ -19,7 +19,8 @@ import {
 	increment_write_version,
 	set_active_effect,
 	component_context,
-	handle_error
+	handle_error,
+	get
 } from '../runtime.js';
 import { equals, safe_equals } from './equality.js';
 import * as e from '../errors.js';
@@ -100,9 +101,11 @@ export function async_derived(fn) {
 
 	var current_deps = new Set(async_deps);
 
+	var derived_promise = derived(fn);
+
 	block(async () => {
 		var effect = /** @type {Effect} */ (active_effect);
-		var current = (promise = fn());
+		var current = (promise = get(derived_promise));
 
 		var restore = capture();
 		var unsuspend = suspend();

packages/svelte/tests/runtime-runes/samples/async-derived/Child.svelte

@@ -4,12 +4,12 @@
 	let value = $derived((await promise) * num);
 
 	$effect(() => {
-		console.log('should run');
+		console.log(`$effect ${value} ${num}`);
 	});
 
-	$effect(() => {
-		console.log(value, num);
+	$effect.pre(() => {
+		console.log(`$effect.pre ${value} ${num}`);
 	});
 </script>
 
-<p>{value}</p>
+<p>{value}{console.log(`template ${value} ${num}`)}</p>

packages/svelte/tests/runtime-runes/samples/async-derived/_config.js

@@ -51,6 +51,19 @@ export default test({
 		await tick();
 		assert.htmlEqual(target.innerHTML, '<p>86</p>');
 
-		assert.deepEqual(logs, ['should run', 42, 1, 42, 2, 84, 2, 86, 2]);
+		assert.deepEqual(logs, [
+			'$effect.pre 42 1',
+			'template 42 1',
+			'$effect 42 1',
+			'$effect.pre 42 2',
+			'template 42 2',
+			'$effect 42 2',
+			'$effect.pre 84 2',
+			'template 84 2',
+			'$effect 84 2',
+			'$effect.pre 86 2',
+			'template 86 2',
+			'$effect 86 2'
+		]);
 	}
 });