PHPUnit RuntimeException: Aws\S3\S3Client的实例不能序列化

Question

在我的CakePHP应用程序中安装了Burzum的CakePHP文件存储插件，并随之安装了Amazon。现在，我所有的515个单元测试都失败了，下面的消息如下：

$ php vendor/bin/phpunit --filter testGenerateWithOnlyUppercase
PHPUnit 5.7.0 by Sebastian Bergmann and contributors.

E                                                                   1 / 1 (100%)

Time: 273 ms, Memory: 26.25MB

There was 1 error:

1) App\Test\TestCase\Auth\DefaultPasswordGeneratorTest::testGenerateWithOnlyUppercase
RuntimeException: Instances of Aws\S3\S3Client cannot be serialized

/var/www/html/MyProject/vendor/aws/aws-sdk-php/src/AwsClient.php:230

ERRORS!
Tests: 1, Assertions: 0, Errors: 1.

(在上面的示例中，我只运行了一个测试，但是每次测试都失败，无论我是否使用PHPUnit --过滤器，每次都有相同的错误)

CakePHP版本为3.4.7，PHPUnit版本为5.7.0。老实说，我不知道为什么PHPUnit要为每个测试进入AWS，也不知道为什么它会像这样失败。任何指示都将不胜感激。

更新：

按照ndm的技巧，我把echo \Cake\Error\Debugger::trace();放在了AwsClient.php:230之前。产出如下：

Aws\AwsClient::__sleep() - ROOT/vendor/aws/aws-sdk-php/src/AwsClient.php, line 230
serialize - [internal], line ??
SebastianBergmann\GlobalState\Snapshot::snapshotGlobals() - ROOT/vendor/sebastian/global-state/src/Snapshot.php, line 313
SebastianBergmann\GlobalState\Snapshot::__construct() - ROOT/vendor/sebastian/global-state/src/Snapshot.php, line 121
PHPUnit_Framework_TestCase::createGlobalStateSnapshot() - ROOT/vendor/phpunit/phpunit/src/Framework/TestCase.php, line 2488
PHPUnit_Framework_TestCase::snapshotGlobalState() - ROOT/vendor/phpunit/phpunit/src/Framework/TestCase.php, line 2407
PHPUnit_Framework_TestCase::runBare() - ROOT/vendor/phpunit/phpunit/src/Framework/TestCase.php, line 928
PHPUnit_Framework_TestResult::run() - ROOT/vendor/phpunit/phpunit/src/Framework/TestResult.php, line 701
PHPUnit_Framework_TestCase::run() - ROOT/vendor/phpunit/phpunit/src/Framework/TestCase.php, line 909
PHPUnit_Framework_TestSuite::run() - ROOT/vendor/phpunit/phpunit/src/Framework/TestSuite.php, line 728
PHPUnit_Framework_TestSuite::run() - ROOT/vendor/phpunit/phpunit/src/Framework/TestSuite.php, line 728
PHPUnit_Framework_TestSuite::run() - ROOT/vendor/phpunit/phpunit/src/Framework/TestSuite.php, line 728
PHPUnit_TextUI_TestRunner::doRun() - ROOT/vendor/phpunit/phpunit/src/TextUI/TestRunner.php, line 487
PHPUnit_TextUI_Command::run() - ROOT/vendor/phpunit/phpunit/src/TextUI/Command.php, line 188
PHPUnit_TextUI_Command::main() - ROOT/vendor/phpunit/phpunit/src/TextUI/Command.php, line 118
[main] - ROOT/vendor/phpunit/phpunit/phpunit, line 52

Answer 1

结果，Aws\S3\S3Client的一个实例被设置为一个全局变量。然后，PHPUnit尝试序列化它，但是失败了。解决方案是在backupGlobals配置文件中将phpunit.xml设置为false：

<?xml version="1.0" encoding="UTF-8"?>
<phpunit
    colors="true"
    processIsolation="false"
    stopOnFailure="false"
    syntaxCheck="false"
    bootstrap="./tests/bootstrap.php"
    backupGlobals="false"
    >
    <php>
        <ini name="memory_limit" value="-1"/>
        <ini name="apc.enable_cli" value="1"/>
    </php>

    <!-- Add any additional test suites you want to run here -->
    <testsuites>
        <testsuite name="Unit">
...

向ndm和burzum大喊大叫，感谢他们为我指明了正确的方向。