add test

test/runtime/samples/component-shorthand-import/Widget.html

@@ -0,0 +1 @@
+<p>This is the widget.</p>

test/runtime/samples/component-shorthand-import/_config.js

@@ -0,0 +1,3 @@
+export default {
+	html: `<p>This is the widget.</p>`,
+};

test/runtime/samples/component-shorthand-import/main.html

@@ -0,0 +1,5 @@
+<Widget/>
+
+<script>
+	export default { components: { Widget: './Widget.html' } };
+</script>