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phpunit-phpunit.xml-backupGlobals的覆盖

发布时间：2021-10-09 22:27:07编辑：雪饮阅读（）

 虽然在phpunit的配置文件phpunit.xml中的phpunit标签上可以通过backupGlobals为true的配置使得全局变量和超全局变量得以备份，且是全局的配置。

但是也可以通过在在测试用例类和测试方法级别用 @backupGlobals 标注来覆盖此配置。
下面这个就是以测试方法级别覆盖的实例。
MyTest.php：
<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;
$a="a";
$GLOBALS["b"]="b";
$_SERVER["c"]="c";
final class MyTest extends TestCase
{
    /**
   *@backupGlobals disabled
     */
    public function testOne(){
        global $a;
        var_dump(__METHOD__.":全局变量a:".$a.',超全局变量:$GLOBALS["b"]:'.$GLOBALS["b"].',$_SERVER["c"]:'.$_SERVER["c"]);
        $a="aa";
        $GLOBALS["b"]="bb";
        $_SERVER["c"]="cc";
    }
    public function testTwo(){
        global $a;
        var_dump(__METHOD__.":全局变量a:".$a.',超全局变量:$GLOBALS["b"]:'.$GLOBALS["b"].',$_SERVER["c"]:'.$_SERVER["c"]);
    }
}
phpunit.xml:

<phpunit bootstrap="src/autoload.php" backupGlobals="true">
</phpunit>

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.
 
RC:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:13:
string(79) "MyTest::testOne:全局变量a:a,超全局变量:$GLOBALS["b"]:b,$_SERVER["c"]:c"
R                                                                  2 / 2 (100%)C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:20:
string(82) "MyTest::testTwo:全局变量a:aa,超全局变量:$GLOBALS["b"]:bb,$_SERVER["c"]:cc"
 
 
Time: 00:00.011, Memory: 6.00 MB
 
There were 2 risky tests:
 
1) MyTest::testOne
This test did not perform any assertions
 
C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:11
 
2) MyTest::testTwo
This test did not perform any assertions
 
C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:18
 
OK, but incomplete, skipped, or risky tests!
Tests: 2, Assertions: 0, Risky: 2.
可以看到第一个测试方法修改的值，第二个测试方法就读取的是修改后的，也就是全局变量和超全局变量的备份没有生效。
那么对于测试用例类整个类来说也是同样的
MyTest.php：
<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;
$a="a";
$GLOBALS["b"]="b";
$_SERVER["c"]="c";
/**
 *@backupGlobals disabled
 */
final class MyTest extends TestCase
{
    public function testOne(){
        global $a;
        var_dump(__METHOD__.":全局变量a:".$a.',超全局变量:$GLOBALS["b"]:'.$GLOBALS["b"].',$_SERVER["c"]:'.$_SERVER["c"]);
        $a="aa";
        $GLOBALS["b"]="bb";
        $_SERVER["c"]="cc";
    }
    public function testTwo(){
        global $a;
        var_dump(__METHOD__.":全局变量a:".$a.',超全局变量:$GLOBALS["b"]:'.$GLOBALS["b"].',$_SERVER["c"]:'.$_SERVER["c"]);
    }
}

运行结果相同：

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.
 
RC:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:13:
string(79) "MyTest::testOne:全局变量a:a,超全局变量:$GLOBALS["b"]:b,$_SERVER["c"]:c"
R                                                                  2 / 2 (100%)C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:20:
string(82) "MyTest::testTwo:全局变量a:aa,超全局变量:$GLOBALS["b"]:bb,$_SERVER["c"]:cc"
 
 
Time: 00:00.009, Memory: 6.00 MB
 
There were 2 risky tests:
 
1) MyTest::testOne
This test did not perform any assertions
 
C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:11
 
2) MyTest::testTwo
This test did not perform any assertions
 
C:\Users\Administrator\PhpstormProjects\untitled\organizing\tests\MyTest.php:18
 
OK, but incomplete, skipped, or risky tests!
Tests: 2, Assertions: 0, Risky: 2.