1.6. 简单工厂

1.6.1. 目的

SimpleFactory 是一个简单的工厂模式。

它不同于静态工厂，因为它不是静态的。因此，您可以拥有多个工厂，可以有不同的参数，可以进行子类化，也可以模拟。它总是比静态工厂更受欢迎！

1.6.2. UML 图

Alt SimpleFactory UML Diagram

1.6.3. 代码

你可以在 GitHub 上找到这些代码

SimpleFactory.php

 1<?php
 2
 3declare(strict_types=1);
 4
 5namespace DesignPatterns\Creational\SimpleFactory;
 6
 7class SimpleFactory
 8{
 9    public function createBicycle(): Bicycle
10    {
11        return new Bicycle();
12    }
13}

Bicycle.php

 1<?php
 2
 3declare(strict_types=1);
 4
 5namespace DesignPatterns\Creational\SimpleFactory;
 6
 7class Bicycle
 8{
 9    public function driveTo(string $destination)
10    {
11    }
12}

1.6.4. Usage

1 $factory = new SimpleFactory();
2 $bicycle = $factory->createBicycle();
3 $bicycle->driveTo('Paris');

1.6.5. 测试

Tests/SimpleFactoryTest.php

 1<?php
 2
 3declare(strict_types=1);
 4
 5namespace DesignPatterns\Creational\SimpleFactory\Tests;
 6
 7use DesignPatterns\Creational\SimpleFactory\Bicycle;
 8use DesignPatterns\Creational\SimpleFactory\SimpleFactory;
 9use PHPUnit\Framework\TestCase;
10
11class SimpleFactoryTest extends TestCase
12{
13    public function testCanCreateBicycle()
14    {
15        $bicycle = (new SimpleFactory())->createBicycle();
16        $this->assertInstanceOf(Bicycle::class, $bicycle);
17    }
18}