test: add application routing and dispatch tests

test/test_application_routing.rb

@@ -0,0 +1,100 @@
+require 'minitest/autorun'
+require 'prism'
+require 'support'
+
+class ResourceApp < Prism::Application
+  enable_sessions(secret: 'routing-secret')
+
+  root(to: 'welcome#show')
+
+  resources :routing_posts, only: %i[index show create]
+
+  get '/whoami' do
+    json(path: url_for(:routing_post, id: 5))
+  end
+
+  get '/write-flash' do
+    flash[:notice] = 'saved!'
+    redirect '/after-flash'
+  end
+
+  get '/after-flash' do
+    json(notice: flash[:notice])
+  end
+end
+
+class WelcomeController < Prism::Controller
+  def show
+    html('welcome')
+  end
+end
+
+class RoutingPostsController < Prism::Controller
+  def index
+    json(action: 'index')
+  end
+
+  def show
+    json(action: 'show', id: params['id'])
+  end
+
+  def create
+    json(action: 'create')
+  end
+end
+
+class ApplicationRoutingTest < Minitest::Test
+  include TestSupport
+
+  def call(method, path, **opts)
+    ResourceApp.call(env_for(method, path, **opts))
+  end
+
+  def test_root_dispatches_to_controller
+    status, _, body = call('GET', '/')
+    assert_equal 200, status
+    assert_equal 'welcome', body.join
+  end
+
+  def test_resources_index
+    _, _, body = call('GET', '/routing_posts')
+    assert_equal({ 'action' => 'index' }, JSON.parse(body.join))
+  end
+
+  def test_resources_show
+    _, _, body = call('GET', '/routing_posts/9')
+    assert_equal({ 'action' => 'show', 'id' => '9' }, JSON.parse(body.join))
+  end
+
+  def test_resources_create
+    _, _, body = call('POST', '/routing_posts')
+    assert_equal({ 'action' => 'create' }, JSON.parse(body.join))
+  end
+
+  def test_resources_only_registers_requested_actions
+    status, = call('DELETE', '/routing_posts/1')
+    assert_equal 404, status
+  end
+
+  def test_url_for_named_resource_route
+    _, _, body = call('GET', '/whoami')
+    assert_equal '/routing_posts/5', JSON.parse(body.join)['path']
+  end
+
+  def test_flash_survives_a_redirect
+    status, headers, = call('GET', '/write-flash')
+    assert_equal 302, status
+    cookie = headers['Set-Cookie'].split(';').first
+    _, _, body = call('GET', '/after-flash', cookies: cookie)
+    assert_equal 'saved!', JSON.parse(body.join)['notice']
+  end
+
+  def test_flash_does_not_survive_a_second_request
+    _, headers, = call('GET', '/write-flash')
+    cookie = headers['Set-Cookie'].split(';').first
+    _, headers2, = call('GET', '/after-flash', cookies: cookie)
+    cookie2 = headers2['Set-Cookie']&.split(';')&.first || cookie
+    _, _, body = call('GET', '/after-flash', cookies: cookie2)
+    assert_nil JSON.parse(body.join)['notice']
+  end
+end