Improve internal API

test/apps/with-basepath/test.ts

@@ -0,0 +1,62 @@
+import * as assert from 'assert';
+import * as puppeteer from 'puppeteer';
+import * as api from '../../../api';
+import { walk } from '../../utils';
+import { AppRunner } from '../AppRunner';
+
+describe('with-basepath', function() {
+	this.timeout(10000);
+
+	let runner: AppRunner;
+	let page: puppeteer.Page;
+	let base: string;
+
+	// hooks
+	before(async () => {
+		await api.build({ cwd: __dirname });
+
+		await api.export({
+			cwd: __dirname,
+			basepath: 'custom-basepath'
+		});
+
+		runner = new AppRunner(__dirname, '__sapper__/build/server/server.js');
+		({ base, page } = await runner.start());
+	});
+
+	after(() => runner.end());
+
+	it('serves /custom-basepath', async () => {
+		await page.goto(`${base}/custom-basepath`);
+
+		assert.equal(
+			await page.$eval('h1', node => node.textContent),
+			'Great success!'
+		);
+	});
+
+	it('emits a basepath message', async () => {
+		await page.goto(`${base}/custom-basepath`);
+
+		assert.deepEqual(runner.messages, [{
+			__sapper__: true,
+			event: 'basepath',
+			basepath: '/custom-basepath'
+		}]);
+	});
+
+	it('crawls an exported site with basepath', () => {
+		const files = walk(`${__dirname}/__sapper__/export`);
+
+		const client_assets = files.filter(file => file.startsWith('custom-basepath/client/'));
+		const non_client_assets = files.filter(file => !file.startsWith('custom-basepath/client/')).sort();
+
+		assert.ok(client_assets.length > 0);
+
+		assert.deepEqual(non_client_assets, [
+			'custom-basepath/global.css',
+			'custom-basepath/index.html',
+			'custom-basepath/service-worker.js'
+		]);
+	});
+});