抽象方法没有被嘲笑

Posted 2023-03-25

【中文标题】抽象方法没有被嘲笑

【英文标题】：Abstract method not getting mocked

【发布时间】：2020-07-21 01:35:38

【问题描述】：

我有一个类似于这个简化示例的设置（应该通过直接复制粘贴来工作），但是我想模拟 Controller->setModel() 的方法没有被模拟。也没有出现错误：

<?php

use PHPUnit\Framework\TestCase;

// Implementation
class Model

    // The constructor here would receive a PDO, but that's not important
    public $data = [
        ['id' => 1, 'text' => 'nope'],
        ['id' => 2, 'text' => 'no'],
        ['id' => 3, 'text' => 'not']
    ];

    public function getItem($id)
    
        // And here we would query with the PDO instead, but again
        // the question is more about mocking the setModel() method
        return $this->data[$id];
    


abstract class Endpoint

    public function __construct()
    
        echo "\n1. Calling abstract class constructor\n";
        $this->model = $this->setModel();
    

    abstract protected function setModel();


class Controller extends Endpoint

    public function getStuff($id)
    
        echo "3. Getting stuff from controller\n";
        $data = $this->model->getItem($id);
        return ['id' => $data['id'], 'text' => $data['text']];
    

    protected function setModel()
    
        echo "2. Setting ACTUAL model of controller\n";
        $config = 'sqlite:myfile.sqlite3'; // Suppose this file exists and is valid
        $pdo = new \PDO($config);
        return new Model($pdo);
    


// Test
final class ControllerTest extends TestCase

    public function testExample()
    
        $mockModel = \Mockery::mock('FakeModel')
            ->shouldReceive('getItem')
            ->andReturn(['id' => 123, 'text' => 'myCustomText']);

        $mock = \Mockery::mock('Controller')->makePartial()
            ->shouldAllowMockingProtectedMethods();
        $mock->shouldReceive('setModel')->andReturn($mockModel);

        $controller = new Controller();
        $result = $controller->getStuff(2);
        $this->assertEquals('myCustomText', $result['text']);
    

测试结果如下。 PDOException 是因为 php5-sqlite 驱动程序不再适用于我的本地 VM（Ubuntu 18.04）。我正在使用 Docker 映像进行设置，但同样的模拟问题也发生在其中。但这不是重点——重点是模拟setModel()：

1. Calling abstract class constructor
2. Setting ACTUAL model of controller


Time: 110 ms, Memory: 7.25MB

There was 1 error:

1) ControllerTest::testExample
PDOException: could not find driver

/home/juha/koodaus/pastes/backend/test/Foo/FooTest.php:45
/home/juha/koodaus/pastes/backend/test/Foo/FooTest.php:26
/home/juha/koodaus/pastes/backend/test/Foo/FooTest.php:63

ERRORS!
Tests: 1, Assertions: 0, Errors: 1.

正如您从第二次调试打印中看到的 - Setting ACTUAL model of controller - 完全忽略了模拟。也不会出现错误或警告。模拟设置有什么问题？

我也尝试过使用overload 和alias，但它们不起作用，即使使用：

/**
 * @runInSeparateProcess
 * @preserveGlobalState disabled
 */

导致：

Mockery\Exception\RuntimeException: Could not load mock Controller, class already exists

但我认为这是一个已知问题。

版本（不支持 PHP 7 的旧版设置）：

PHP 5.6.40 PHPUnit 5.7.27 嘲讽1.3.1

【参考方案1】：

我认为您无法按照自己的方式设置模拟。当您调用 ->makePartial() 或 ->make 或 ->getMockForAbstractClass() 时，将调用构造方法。所以 $this->setModel();总是返回 null。

我会建议这个解决方案。

public function testExample()


    $mock = $this->getMockBuilder(Controller::class)
            ->setMethods(['setModel'])->getMock();

    $mockModel = \Mockery::mock('FakeModel');
    $mockModel->shouldReceive('getItem')
            ->andReturn(['id' => 123, 'text' => 'myCustomText']);

    $mock->method('setModel')->willReturn($mockModel);

    $mock->instuctModel();

    $result = $mock->getStuff(2);
    $this->assertEquals('myCustomText', $result['text']);

而endPoint Abstract 类应该改成下面这个

abstract class Endpoint

    protected $model;

    public function __construct()
    
        echo "\n1. Calling abstract class constructor\n";
    

    public function instuctModel()

        $this->model = $this->setModel();
    

    abstract public function setModel();