TEST: Set up for testing via zuul/sauce labs (#86)

This requires the .travis.yml to be updated with the open sauce credentials
as explained at https://github.com/defunctzombie/zuul/wiki/Travis-ci#5-final-step

tests/browser/basic.js

@@ -0,0 +1,60 @@
+const tape = require('tape')
+const choo = require('../../')
+
+tape('should render on the client', function (t) {
+  t.test('state should not be mutable', function (t) {
+    t.plan(4)
+
+    const app = choo()
+    const state = {
+      foo: 'baz',
+      beep: 'boop'
+    }
+
+    app.model({
+      state: state,
+      namespace: 'test',
+      reducers: {
+        'no-reducer-mutate': (action, state) => {
+          return {}
+        },
+        'mutate-on-return': (action, state) => {
+          delete action.type
+          return action
+        }
+      },
+      effects: {
+        'triggers-reducers': (action, state, send) => {
+          send('test:mutate-on-return', {beep: 'barp'})
+        }
+      }
+    })
+
+    let loop = -1
+
+    const asserts = [
+      (state) => t.deepEqual(state, {foo: 'baz', beep: 'boop'}, 'intial state'),
+      (state) => t.deepEqual(state, {foo: 'baz', beep: 'boop'}, 'no change in state'),
+      (state) => t.deepEqual(state, {foo: 'oof', beep: 'boop'}, 'change in state from reducer'),
+      (state) => t.deepEqual(state, {foo: 'oof', beep: 'barp'}, 'change in state from effect')
+    ]
+
+    const triggers = [
+      (send) => send('test:no-reducer-mutate'),
+      (send) => send('test:mutate-on-return', {foo: 'oof'}),
+      (send) => send('test:triggers-reducers')
+    ]
+
+    app.router((route) => [
+      route('/', function (params, state, send) {
+        ++loop
+        asserts[loop] && asserts[loop](state.test)
+        setTimeout(() => triggers[loop] && triggers[loop](send), 5)
+        return choo.view`<div><span class="test">${state.foo}:${state.beep}</span></div>`
+      })
+    ])
+
+    const tree = app.start()
+    document.body.appendChild(tree)
+  })
+})