increase test coverage

test/runtime/samples/store-component-binding-each/Widget.html

@@ -0,0 +1 @@
+<input bind:value>

test/runtime/samples/store-component-binding-each/_config.js

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+import { Store } from '../../../../store.js';
+
+const store = new Store({
+	a: ['foo', 'bar', 'baz']
+});
+
+export default {
+	store,
+
+	html: `
+		<input><input><input>
+		<p>foo, bar, baz</p>
+	`,
+
+	test(assert, component, target, window) {
+		const event = new window.MouseEvent('input');
+		const inputs = target.querySelectorAll('input');
+
+		inputs[0].value = 'blah';
+		inputs[0].dispatchEvent(event);
+
+		assert.deepEqual(store.get('a'), ['blah', 'bar', 'baz']);
+		assert.htmlEqual(target.innerHTML, `
+			<input><input><input>
+			<p>blah, bar, baz</p>
+		`);
+
+		component.destroy();
+	},
+};

test/runtime/samples/store-component-binding-each/main.html

@@ -0,0 +1,15 @@
+{{#each $a as x}}
+	<Widget bind:value='x'/>
+{{/each}}
+
+<p>{{$a.join(', ')}}</p>
+
+<script>
+	import Widget from './Widget.html';
+
+	export default {
+		components: {
+			Widget
+		}
+	};
+</script>