overhaul tests

test/apps/export/__test__.ts

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+import * as path from 'path';
+import * as assert from 'assert';
+import { walk } from '../../utils';
+import * as api from '../../../api';
+
+describe('export', function() {
+	this.timeout(10000);
+
+	// hooks
+	before(() => {
+		return new Promise((fulfil, reject) => {
+			// TODO this is brittle. Make it unnecessary
+			process.chdir(__dirname);
+			process.env.NODE_ENV = 'production';
+
+			// TODO this API isn't great. Rethink it
+			const builder = api.build({
+				bundler: 'rollup'
+			}, {
+				src: path.join(__dirname, 'src'),
+				routes: path.join(__dirname, 'src/routes'),
+				dest: path.join(__dirname, '__sapper__/build')
+			});
+
+			builder.on('error', reject);
+			builder.on('done', () => {
+				// TODO it'd be nice if build and export returned promises.
+				// not sure how best to combine promise and event emitter
+				const exporter = api.exporter({
+					build: '__sapper__/build',
+					dest: '__sapper__/export',
+					static: 'static',
+					basepath: '',
+					timeout: 5000
+				});
+
+				exporter.on('error', (err: Error) => {
+					console.error(err);
+					reject(err);
+				});
+				exporter.on('done', () => fulfil());
+			});
+		});
+	});
+
+	it('crawls a site', () => {
+		const files = walk('__sapper__/export');
+
+		const client_assets = files.filter(file => file.startsWith('client/'));
+		const non_client_assets = files.filter(file => !file.startsWith('client/')).sort();
+
+		assert.ok(client_assets.length > 0);
+
+		assert.deepEqual(non_client_assets, [
+			'blog.json',
+			'blog/bar.json',
+			'blog/bar/index.html',
+			'blog/baz.json',
+			'blog/baz/index.html',
+			'blog/foo.json',
+			'blog/foo/index.html',
+			'blog/index.html',
+			'global.css',
+			'index.html',
+			'service-worker.js'
+		]);
+	});
+
+	// TODO test timeout, basepath
+});

test/apps/export/rollup.config.js

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+import resolve from 'rollup-plugin-node-resolve';
+import replace from 'rollup-plugin-replace';
+import svelte from 'rollup-plugin-svelte';
+
+const mode = process.env.NODE_ENV;
+const dev = mode === 'development';
+
+const config = require('../../../config/rollup.js');
+
+export default {
+	client: {
+		input: config.client.input(),
+		output: config.client.output(),
+		plugins: [
+			replace({
+				'process.browser': true,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			}),
+			svelte({
+				dev,
+				hydratable: true,
+				emitCss: true
+			}),
+			resolve()
+		],
+
+		// temporary, pending Rollup 1.0
+		experimentalCodeSplitting: true
+	},
+
+	server: {
+		input: config.server.input(),
+		output: config.server.output(),
+		plugins: [
+			replace({
+				'process.browser': false,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			}),
+			svelte({
+				generate: 'ssr',
+				dev
+			}),
+			resolve({
+				preferBuiltins: true
+			})
+		],
+		external: ['sirv', 'polka'],
+
+		// temporary, pending Rollup 1.0
+		experimentalCodeSplitting: true
+	},
+
+	serviceworker: {
+		input: config.serviceworker.input(),
+		output: config.serviceworker.output(),
+		plugins: [
+			resolve(),
+			replace({
+				'process.browser': true,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			})
+		]
+	}
+};

test/apps/export/src/client.js

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+import * as sapper from '../__sapper__/client.js';
+
+window.start = () => sapper.start({
+	target: document.querySelector('#sapper')
+});
+
+window.prefetchRoutes = () => sapper.prefetchRoutes();
+window.prefetch = href => sapper.prefetch(href);
+window.goto = href => sapper.goto(href);

test/apps/export/src/routes/_error.html

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+<h1>{status}</h1>
+
+<p>{error.message}</p>

test/apps/export/src/routes/blog/[slug].html

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+<h1>{post.title}</h1>
+
+<script>
+	export default {
+		preload({ params }) {
+			return this.fetch(`blog/${params.slug}.json`).then(r => r.json()).then(post => {
+				return { post };
+			});
+		}
+	};
+</script>

test/apps/export/src/routes/blog/[slug].json.js

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+import posts from './_posts.js';
+
+export function get(req, res) {
+	const post = posts.find(post => post.slug === req.params.slug);
+
+	if (post) {
+		res.writeHead(200, {
+			'Content-Type': 'application/json'
+		});
+
+		res.end(JSON.stringify(post));
+	} else {
+		res.writeHead(404, {
+			'Content-Type': 'application/json'
+		});
+
+		res.end(JSON.stringify({ message: 'not found' }));
+	}
+}

test/apps/export/src/routes/blog/_posts.js

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+export default [
+	{ slug: 'foo', title: 'once upon a foo' },
+	{ slug: 'bar', title: 'a bar is born' },
+	{ slug: 'baz', title: 'bazzily ever after' }
+];

test/apps/export/src/routes/blog/index.html

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+<h1>blog</h1>
+
+{#each posts as post}
+	<p><a href="blog/{post.slug}">{post.title}</a></p>
+{/each}
+
+<script>
+	export default {
+		preload() {
+			return this.fetch('blog.json').then(r => r.json()).then(posts => {
+				return { posts };
+			});
+		}
+	};
+</script>

test/apps/export/src/routes/blog/index.json.js

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+import posts from './_posts.js';
+
+export function get(req, res) {
+	res.writeHead(200, {
+		'Content-Type': 'application/json'
+	});
+
+	res.end(JSON.stringify(posts));
+}

test/apps/export/src/routes/index.html

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+<h1>Great success!</h1>
+
+<a href="blog">blog</a>

test/apps/export/src/server.js

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+import sirv from 'sirv';
+import polka from 'polka';
+import * as sapper from '../__sapper__/server.js';
+
+const { PORT, NODE_ENV } = process.env;
+const dev = NODE_ENV === 'development';
+
+polka()
+	.use(
+		sirv('static', { dev }),
+		sapper.middleware()
+	)
+	.listen(PORT, err => {
+		if (err) console.log('error', err);
+	});

test/apps/export/src/service-worker.js

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+import { timestamp, files, shell, routes } from '../__sapper__/service-worker.js';
+
+const ASSETS = `cache${timestamp}`;
+
+// `shell` is an array of all the files generated by webpack,
+// `files` is an array of everything in the `static` directory
+const to_cache = shell.concat(ASSETS);
+const cached = new Set(to_cache);
+
+self.addEventListener('install', event => {
+	event.waitUntil(
+		caches
+			.open(ASSETS)
+			.then(cache => cache.addAll(to_cache))
+			.then(() => {
+				self.skipWaiting();
+			})
+	);
+});
+
+self.addEventListener('activate', event => {
+	event.waitUntil(
+		caches.keys().then(async keys => {
+			// delete old caches
+			for (const key of keys) {
+				if (key !== ASSETS) await caches.delete(key);
+			}
+
+			self.clients.claim();
+		})
+	);
+});
+
+self.addEventListener('fetch', event => {
+	if (event.request.method !== 'GET') return;
+
+	const url = new URL(event.request.url);
+
+	// don't try to handle e.g. data: URIs
+	if (!url.protocol.startsWith('http')) return;
+
+	// ignore dev server requests
+	if (url.hostname === self.location.hostname && url.port !== self.location.port) return;
+
+	// always serve assets and webpack-generated files from cache
+	if (url.host === self.location.host && cached.has(url.pathname)) {
+		event.respondWith(caches.match(event.request));
+		return;
+	}
+
+	// for pages, you might want to serve a shell `index.html` file,
+	// which Sapper has generated for you. It's not right for every
+	// app, but if it's right for yours then uncomment this section
+	/*
+	if (url.origin === self.origin && routes.find(route => route.pattern.test(url.pathname))) {
+		event.respondWith(caches.match('/index.html'));
+		return;
+	}
+	*/
+
+	if (event.request.cache === 'only-if-cached') return;
+
+	// for everything else, try the network first, falling back to
+	// cache if the user is offline. (If the pages never change, you
+	// might prefer a cache-first approach to a network-first one.)
+	event.respondWith(
+		caches
+			.open(`offline${timestamp}`)
+			.then(async cache => {
+				try {
+					const response = await fetch(event.request);
+					cache.put(event.request, response.clone());
+					return response;
+				} catch(err) {
+					const response = await cache.match(event.request);
+					if (response) return response;
+
+					throw err;
+				}
+			})
+	);
+});

test/apps/export/src/template.html

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+<!doctype html>
+<html lang="en">
+<head>
+	<meta charset='utf-8'>
+
+	%sapper.base%
+	%sapper.styles%
+	%sapper.head%
+</head>
+<body>
+	<div id='sapper'>%sapper.html%</div>
+	%sapper.scripts%
+</body>
+</html>

test/apps/export/static/global.css

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+body {
+	font-family: 'Comic Sans MS';
+}