phpUnit 因奇怪的错误而失败

Question

PHP Fatal error:  Default value for parameters with a class type hint can only be NULL in /usr/share/php/PHPUnit/Framework/Test.php on line 66
PHP Stack trace:
PHP   1. {main}() /usr/bin/phpunit:0
PHP   2. PHPUnit_TextUI_Command::main() /usr/bin/phpunit:46
PHP   3. PHPUnit_TextUI_Command->run() /usr/share/php/PHPUnit/TextUI/Command.php:130
PHP   4. PHPUnit_Runner_BaseTestRunner->getTest() /usr/share/php/PHPUnit/TextUI/Command.php:150
PHP   5. PHPUnit_Runner_BaseTestRunner->loadSuiteClass() /usr/share/php/PHPUnit/Runner/BaseTestRunner.php:104
PHP   6. PHPUnit_Runner_StandardTestSuiteLoader->load() /usr/share/php/PHPUnit/Runner/BaseTestRunner.php:168
PHP   7. PHPUnit_Util_Fileloader::checkAndLoad() /usr/share/php/PHPUnit/Runner/StandardTestSuiteLoader.php:78
PHP   8. PHPUnit_Util_Fileloader::load() /usr/share/php/PHPUnit/Util/Fileloader.php:79
PHP   9. include_once() /usr/share/php/PHPUnit/Util/Fileloader.php:95
PHP  10. phpunit_autoload() /usr/share/php/PHPUnit/Autoload.php:0
PHP  11. require() /usr/share/php/PHPUnit/Autoload.php:203
PHP  12. phpunit_autoload() /usr/share/php/PHPUnit/Autoload.php:0

有问题的行有:

公共(public)函数运行(PHPUnit_Framework_TestResult $result = NULL)

当我删除 = NULL 时，它通过了但在另一行也有 = NULL 时失败了，搞砸的是错误基本上说它有为 NULL，它是。

我没有以任何方式修改 PhpUnit，我使用此处描述的方法安装它:

http://www.giocc.com/installing-phpunit-on-ubuntu-11-04-natty-narwhal.html

老实说，我不明白为什么会这样。有些东西告诉我 PHP 有问题，因为它给了我错误的错误。

Answer 1

找到答案了，引用自评论区:

Oh damn I found the problem, and it's a silly one on my side. I had a constant file that was defining NULL for use in an ORM library. It's defined in it's own namespace so it shouldn't have interfered with the global constant, but I guess constants are a bit tricky with namespaces..

所以直到，如果你想在命名空间中定义常量，仅仅在文件顶部添加命名空间是不够的，你必须像这样定义常量

define('NAMESPACE\CONSTANT',        'value');
// or
define(__NAMESPACE__ . '\CONSTANT', 'value'); // to use the current namespace