PHPUnit 单元测试与 Mock 对象

安装 PHPUnit

composer require --dev phpunit/phpunit

测试类

use PHPUnit\Framework\TestCase;



class UserTest extends TestCase

{

    public function testUserFullName(): void

    {

        $user = new User('张三', '三' );

        $this->assertEquals('张三三', $user->getFullName());

    }



    public function testAgeValidation(): void

    {

        $this->expectException(\InvalidArgumentException::class);

        new User('张三', '三', -1);

    }

}

数据提供器

/**

 * @dataProvider additionProvider

 */

public function testAdd(int $a, int $b, int $expected): void

{

    $this->assertEquals($expected, $a + $b);

}



public function additionProvider(): array

{

    return [

        [1, 2, 3],

        [0, 0, 0],

        [-1, 1, 0],

    ];

}

Mock 对象

模拟依赖服务，隔离测试。

class OrderServiceTest extends TestCase

{

    public function testCreateOrder(): void

    {

        $paymentMock = $this->createMock(PaymentService::class);

        $paymentMock->method('charge')

            ->willReturn(true);



        $emailMock = $this->createMock(EmailService::class);

        $emailMock->expects($this->once())

            ->method('send')

            ->with($this->stringContains('订单已创建'));



        $service = new OrderService($paymentMock, $emailMock);

        $service->create([...]);

    }

}

运行测试：./vendor/bin/phpunit

单元测试是保证代码质量的重要防线。