added test for modifier trusted

test/runtime/samples/event-handler-modifier-trusted/_config.js

@@ -0,0 +1,9 @@
+export default {
+	async test({ assert, component, target, window }) {
+		const button = target.querySelector('button');
+		const event = new window.MouseEvent('click');
+
+		await button.dispatchEvent(event);
+		assert.equal(component.trusted, false);
+	}
+};

test/runtime/samples/event-handler-modifier-trusted/main.svelte

@@ -0,0 +1,5 @@
+<script>
+	export let trusted = false;
+</script>
+
+<button on:click|trusted="{() => trusted = true}">Only trusted events: {trusted?'true':'false'}</button>