add server- and client-side store management (#178)

test/app/app/client.js

@@ -1,8 +1,11 @@
 import { init, prefetchRoutes } from '../../../runtime.js';
+import { Store } from 'svelte/store.js';
 import { routes } from './manifest/client.js';
 
 window.init = () => {
-	return init(document.querySelector('#sapper'), routes);
+	return init(document.querySelector('#sapper'), routes, {
+		store: data => new Store(data)
+	});
 };
 
 window.prefetchRoutes = prefetchRoutes;

test/app/app/server.js

@@ -3,6 +3,7 @@ import { resolve } from 'url';
 import express from 'express';
 import serve from 'serve-static';
 import sapper from '../../../dist/middleware.ts.js';
+import { Store } from 'svelte/store.js';
 import { routes } from './manifest/server.js';
 
 let pending;
@@ -77,7 +78,14 @@ const middlewares = [
 		next();
 	},
 
-	sapper({ routes })
+	sapper({
+		routes,
+		store: () => {
+			return new Store({
+				title: 'Stored title'
+			});
+		}
+	})
 ];
 
 if (BASEPATH) {

test/app/routes/store.html

@@ -0,0 +1 @@
+<h1>{{$title}}</h1>

test/common/test.js

@@ -521,6 +521,18 @@ function run({ mode, basepath = '' }) {
 						assert.equal(title, '42');
 					});
 			});
+
+			it('renders store props', () => {
+				return nightmare.goto(`${base}/store`)
+					.page.title()
+					.then(title => {
+						assert.equal(title, 'Stored title');
+						return nightmare.init().page.title();
+					})
+					.then(title => {
+						assert.equal(title, 'Stored title');
+					});
+			});
 		});
 
 		describe('headers', () => {