class AuthControllerTest extends Zend_Test_PHPUnit_ControllerTestCase {
    ...
    public function testUserFailingLogin() {

        $this->request->setPost(array(
            'email'  => 'wrong@email.com',
            'password' => 'wrongpassword',
        ));

        $this->request->setMethod('POST');
        $this->dispatch('/login');

        $this->assertQuery('.alert');
    }
}