overhaul tests

test/apps/credentials/src/server.js

@@ -0,0 +1,13 @@
+import polka from 'polka';
+import * as sapper from '../__sapper__/server.js';
+
+const { PORT } = process.env;
+
+polka()
+	.use((req, res, next) => {
+		// set test cookie
+		res.setHeader('Set-Cookie', ['a=1; Max-Age=3600', 'b=2; Max-Age=3600']);
+		next();
+	})
+	.use(sapper.middleware())
+	.listen(PORT);