Add slots test... currently failing.

test/custom-elements/samples/no-shadow-dom-with-slots.solo/_config.js

@@ -0,0 +1,4 @@
+export default {
+	customElement: true,
+	shadowDom: false
+};

test/custom-elements/samples/no-shadow-dom-with-slots.solo/main.svelte

@@ -0,0 +1,7 @@
+<svelte:options tag="custom-element"/>
+
+<script>
+import './other.svelte'
+</script>
+
+<other-element>Hello world</other-element>

test/custom-elements/samples/no-shadow-dom-with-slots.solo/other.svelte

@@ -0,0 +1,3 @@
+<svelte:options tag="other-element"/>
+
+<h1><slot/></h1>

test/custom-elements/samples/no-shadow-dom-with-slots.solo/test.js

@@ -0,0 +1,17 @@
+import * as assert from 'assert';
+import CustomElement from './main.svelte';
+
+export default function (target) {
+	new CustomElement({
+		target
+	});
+
+	assert.equal(target.innerHTML, '<custom-element><other-element><h1>Hello world!</h1></other-element></custom-element>');
+
+	const el = target.querySelector('custom-element');
+	const h1 = el.querySelector('h1');
+	const { color } = getComputedStyle(h1);
+
+	assert.equal(h1.textContent, 'Hello world!');
+	assert.equal(color, 'rgb(0, 0, 255)');
+}