如何使用phpunit测试这个类？

Question

如何使用phpunit测试这个类？

3

我正在使用Laravel 4.2，尝试使用phpunit来测试我的代码，而不是手动测试。我已经阅读了Jeffrey Way的书《Laravel Testing Decoded》，但是我仍然觉得我的第一个测试很棘手。我想测试的类如下所示。我遇到的问题是-我应该测试什么？

我认为我不应该测试数据库或Model $advert，因为它们应该有自己的测试。在这种情况下，我认为我需要模拟$advert或为其创建一个工厂，但我不知道哪一个。

非常感谢您的任何指针。

EloquentListing.php

<?php

namespace PlaneSaleing\Repo\Listing;

use Illuminate\Database\Eloquent\Model;

class EloquentListing implements ListingInterface {

    protected $advert;

    public function __construct(Model $advert)
    {
        $this->advert = $advert;
    }

    /**
     * Get paginated listings
     *
     * @param int  Current page
     * @param int Number of listings per page
     * @return StdClass object with $items and $totalItems for pagination
     */
    public function byPage($page=1, $limit=10)
    {

        $result = new \StdClass;
        $result->page = $page;
        $result->limit = $limit;
        $result->totalItems = 0;
        $result->items = array();

        $listings = $this->advert
                         ->orderBy('created_at')
                         ->skip( $limit * ($page-1) )
                         ->take($limit)
                         ->get();

        // Create object to return data useful for pagination
        $result->items = $listings->all();
        $result->totalItems = $this->totalArticles;

        return data;

    }
    /**
     * Get total listing count
     *
     * 
     */
    protected function totalArticles()
    {

        return $this->advert->count();

    }

}

- Ben Thompson

1个回答

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- Vadims Auzans · Accepted Answer

你需要测试类中的每个方法，包括构造函数，需要测试构造函数是否能够设置模型到属性中，还有保护方法。

你应该使用 mock 测试你的模型。可以通过以下命令安装：

$ composer require mockery/mockery

然后在你的测试文件中：

<?php

use Mockery;
use ReflectionClass;
use PlaneSaleing\Repo\Listing\EloquentListing;

class EloquentListingTest extends \TestCase
{

    /**
     * Testing if __constructor is setting up property
     */
    public function testModelSetsUp()
    {
        $mock = Mockery::mock(Illuminate\Database\Eloquent\Model::class);

        $listing = new EloquentListing($mock);

        $reflection = new ReflectionClass($listing);

        // Making your attribute accessible
        $property = $reflection->getProperty('advert');
        $property->setAccessible(true);

        $this->assertInstanceOf(Illuminate\Database\Eloquent\Model::class, $property);
    }

    /**
     * Here you will check if your model is recieving calls
     */
    public function testByPage()
    {
       $mock = Mockery::mock(Illuminate\Database\Eloquent\Model::class);

       $mock->shouldReceive('orderBy')
            ->with('created_at')
            ->once()
            ->andReturn(Mockery::self())
            ->shouldReceive('skip')
            ->with(10)
            ->once()
            ->andReturn(Mockery::self())
            ->shouldReceive('take')
            ->with(10)
            ->andReturn(Mockery::self())
            ->shouldReceive('get')
            ->once()
            ->andReturn(Mockery::self())
            ->shouldReceive('all')
            ->once()
            ->andReturn(Mockery::self());

        $listing = new EloquentListing($mock);
    }

    /**
     * Here you will see, if your model is receiving call '->count()'
     */
    public function testTotalArticles()
    {
        $mock = Mockery::mock(Illuminate\Database\Eloquent\Model::class);

        $mock->shouldReceive('count')
            ->once()
            ->andReturn(Mockery::self());

        $listing = new EloquentListing($mock);

        // We will have to set method accesible
        $reflection = new ReflectionClass($listing);

        $method = $reflection->getMethod('totalArticles');
        $method->setAccessible(true);

        $listing->totalArticles();
    }

}