tests: runtime: add test case for dynamic event stored as hash

test/runtime/samples/event-handler-dynamic-hash/_config.js

@@ -0,0 +1,56 @@
+export default {
+	html: `
+	<p>
+		<button>set handler 1</button>
+		<button>set handler 2</button>
+	</p>
+	<p>0</p>
+	<button>click</button>
+	`,
+
+	async test({ assert, component, target, window }) {
+		const [updateButton1, updateButton2, button] = target.querySelectorAll(
+			'button'
+		);
+
+		const event = new window.MouseEvent('click');
+		let err = "";
+		window.addEventListener('error', (e) => {
+			e.preventDefault();
+			err = e.message;
+		});
+
+		await button.dispatchEvent(event);
+		assert.equal(err, "", err);
+		assert.htmlEqual(target.innerHTML, `
+			<p>
+				<button>set handler 1</button>
+				<button>set handler 2</button>
+			</p>
+			<p>0</p>
+			<button>click</button>
+		`);
+
+		await updateButton1.dispatchEvent(event);
+		await button.dispatchEvent(event);
+		assert.htmlEqual(target.innerHTML, `
+			<p>
+				<button>set handler 1</button>
+				<button>set handler 2</button>
+			</p>
+			<p>1</p>
+			<button>click</button>
+		`);
+
+		await updateButton2.dispatchEvent(event);
+		await button.dispatchEvent(event);
+		assert.htmlEqual(target.innerHTML, `
+			<p>
+				<button>set handler 1</button>
+				<button>set handler 2</button>
+			</p>
+			<p>2</p>
+			<button>click</button>
+		`);
+	},
+};

test/runtime/samples/event-handler-dynamic-hash/main.svelte

@@ -0,0 +1,23 @@
+<script>
+	let clickHandler = {};
+	let number = 0;
+	
+	function updateHandler1(){
+		clickHandler.f = () => number = 1;
+	}
+
+	function updateHandler2(){
+		clickHandler.f = () => number = 2;
+	}
+	
+
+</script>
+
+<p>
+<button on:click={updateHandler1}>set handler 1</button>
+<button on:click={updateHandler2}>set handler 2</button>
+</p>
+
+<p>{ number }</p>
+
+<button on:click={clickHandler.f}>click</button>