CodeceptionでのMockを使ったFacadeのテスト / Using Mock to test Facade with Codeception for Laravel ref: http://qiita.com/fluke8259/items/98e6b2d82f214fc91230

FunctionalHelper.php

<?php namespace Codeception\Module;

class FunctionalHelper extends \Codeception\Module
{
    public function getApp(){
        return $app = $this->getModule('Laravel4')->kernel;
    }
    public function readyMailerMock(){
        $mock = \Mockery::mock('Mailer');
        $this->getApp()['mailer'] = $mock;
        return $mock;
    }
    public function seeMailQueued($view, $email){
        $mock = $this->readyMailerMock();
        $mock->shouldReceive('queue')->once()->with($view, \Mockery::any(), \Mockery::on(function($closure)use($email){
            $message = \Mockery::mock('Message');
            $message->shouldReceive('to')->with($email)->andReturn(\Mockery::self());
            $message->shouldReceive('subject')->with(\Mockery::any())->andReturn(\Mockery::self());
            $closure($message);

            return true;
        }));
        return $mock;
    }
}

hello.blade.php

<h1>Hello!</h1>
<p>CodeCeption ROX!!</p>

routes.php

<?php
Route::get('mail', function(){
    \Mail::queue('emails.hello', [], function($message) use($email){
        $message->to($email)->subject('Email Test!');
        });
});

SendMailCept.php

$I->wantTo('send a mail');

$email = '[email protected]';

$I->seeMailQueued('emails.hello', $email);
$I->amOnPage('mail');