public function testIndexBackButton()
{
$crawler = $this->client->request('GET', $this->app->path('admin_customer_edit', array('id' => $this->Customer->getId())));
$this->expected = '検索画面に戻る';
$this->actual = $crawler->filter('#detail_box__footer')->text();
$this->assertContains($this->expected, $this->actual);
}