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phpunit标注-backupStaticAttributes

发布时间：2021-10-06 17:27:36编辑：雪饮阅读（）

 backupStaticAttributes标注同backupGlobals标注类似，只是backupStaticAttributes用于静态属性。

MyTest.php：
<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;
/**
 * @backupStaticAttributes enabled
 */
final class MyTest extends TestCase
{
    static $a="a";
    public function testOne(): void
    {
        var_dump(__METHOD__."静态属性a:".self::$a);
        self::$a="aa";
      $this->assertTrue(true);
    }
    public function testTwo(): void
    {
        var_dump(__METHOD__."静态属性a:".self::$a);
        $this->assertTrue(true);
    }
}
运行结果：
C:\Users\Administrator>D:\phpstudy_pro\Extensions\php\php7.4.3nts\php.exe C:\Users\Administrator\PhpstormProjects\untitled\vendor\phpunit\phpunit\phpunit -c C:\Users\Administrator\PhpstormProjects\untitled\organizing\phpunit.xml C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php
PHPUnit 9.5.8 by Sebastian Bergmann and contributors.
 
.string(30) "MyTest::testOne静态属性a:a"
.                                                                  2 / 2 (100%)string(30) "MyTest::testTwo静态属性a:a"
 
 
Time: 00:00.060, Memory: 6.00 MB
 
OK (2 tests, 2 assertions)
那么backupStaticAttributes同样支持像是backupGlobals那种更细的颗粒度，即也能在某个方法上单独配置变量是否备份。
MyTest.php：

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;
/**
 * @backupStaticAttributes enabled
 */
final class MyTest extends TestCase
{
    static $a="a";
    public function testOne(): void
    {
        var_dump(__METHOD__."静态属性a:".self::$a);
        self::$a="aa";
      $this->assertTrue(true);
    }
    /**
     * @backupStaticAttributes disabled
     */
    public function testTwo(): void
    {
        var_dump(__METHOD__."静态属性a:".self::$a);
        self::$a="aaa";
        $this->assertTrue(true);
    }
    public function testThree(): void
    {
        var_dump(__METHOD__."静态属性a:".self::$a);
        $this->assertTrue(true);
    }
}

运行结果：

C:\Users\Administrator>D:\phpstudy_pro\Extensions\php\php7.4.3nts\php.exe C:\Users\Administrator\PhpstormProjects\untitled\vendor\phpunit\phpunit\phpunit -c C:\Users\Administrator\PhpstormProjects\untitled\organizing\phpunit.xml C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php
PHPUnit 9.5.8 by Sebastian Bergmann and contributors.
 
.string(30) "MyTest::testOne静态属性a:a"
.string(30) "MyTest::testTwo静态属性a:a"
.                                                                 3 / 3 (100%)string(34) "MyTest::testThree静态属性a:aaa"
 
 
Time: 00:00.012, Memory: 6.00 MB
 
OK (3 tests, 3 assertions)
补充：

受限于 PHP 的内部实现，在某些情况下即使使用了 @backupStaticAttributes 也可能有个别静态值出现意料外的延续，并污染后继测试。

细节参见全局状态。