add server tests (#501)

* add server tests

* remove node 4 tests

test.js

@@ -1 +1,17 @@
-// var tape = require('tape')
+var tape = require('tape')
+
+var html = require('./html')
+var choo = require('./')
+
+tape('should render on the server', function (t) {
+  var app = choo()
+  app.route('/', function (state, emit) {
+    return html`
+      <p>Hello filthy planet</p>
+    `
+  })
+  var res = app.toString('/')
+  var exp = '<p>Hello filthy planet</p>'
+  t.equal(res.toString(), exp, 'result was OK')
+  t.end()
+})