Improve internal API

test/apps/store/test.ts

@@ -0,0 +1,36 @@
+import * as assert from 'assert';
+import * as puppeteer from 'puppeteer';
+import { build } from '../../../api';
+import { AppRunner } from '../AppRunner';
+
+describe('store', function() {
+	this.timeout(10000);
+
+	let runner: AppRunner;
+	let page: puppeteer.Page;
+	let base: string;
+
+	// helpers
+	let start: () => Promise<void>;
+
+	// hooks
+	before(async () => {
+		await build({ cwd: __dirname });
+
+		runner = new AppRunner(__dirname, '__sapper__/build/server/server.js');
+		({ base, page, start } = await runner.start());
+	});
+
+	after(() => runner.end());
+
+	const title = () => page.$eval('h1', node => node.textContent);
+
+	it('renders store props', async () => {
+		await page.goto(`${base}/store`);
+
+		assert.equal(await title(), 'hello world');
+
+		await start();
+		assert.equal(await title(), 'hello world');
+	});
+});