在 Laravel 中使用 RefreshDatabase 时尝试访问 null 类型值的数组偏移量

Question

我正在 Laravel 6.15（使用 Spark 9）的全新安装中编写测试。我的 PHP 版本是 PHP 7.4.2。我的测试环境是 Laravel MacOS 上的 Valet。

我遇到一个问题，每当我使用 RefreshDatabase 特征作为测试的一部分时，所有测试都会失败，并尝试访问类型为 null 的值的数组偏移量错误消息。

从周围阅读的建议似乎是每当遇到此错误时降级到 PHP 7.3，但是官方文档中没有提到不支持 PHP 7.4 - 是还有其他解决错误的方法吗？

即使特征对 Laravel 示例测试感兴趣也会触发：


namespace Tests\Feature;

use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class ExampleTest extends TestCase
{

    Use RefreshDatabase;

    /**
     * A basic test example.
     *
     * @return void
     */
    public function testBasicTest()
    {
        $response = $this->get('/');

        $response->assertStatus(200);
    }
}

给予


PHPUnit 8.5.2 by Sebastian Bergmann and contributors.

.EE                                                                 3 / 3 (100%)

Time: 212 ms, Memory: 22.00 MB

There were 2 errors:

1) Tests\Feature\ExampleTest::testBasicTest
ErrorException: Trying to access array offset on value of type null

/Users/rory/sites/landlord/vendor/laravel/telescope/src/Watchers/QueryWatcher.php:46
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:369
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:218
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Connection.php:833
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Connection.php:687
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Connection.php:640
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Connection.php:338
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Connection.php:309
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Schema/Builder.php:75
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Migrations/DatabaseMigrationRepository.php:169
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Migrations/Migrator.php:590
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/MigrateCommand.php:91
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/MigrateCommand.php:63
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:32
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Container/Util.php:36
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:90
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:34
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Container/Container.php:590
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Console/Command.php:134
/Users/rory/sites/landlord/vendor/symfony/console/Command/Command.php:255
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Console/Command.php:121
/Users/rory/sites/landlord/vendor/symfony/console/Application.php:1012
/Users/rory/sites/landlord/vendor/symfony/console/Application.php:272
/Users/rory/sites/landlord/vendor/symfony/console/Application.php:148
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Console/Application.php:93
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Console/Application.php:185
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:273
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:139
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:238
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Testing/Concerns/InteractsWithConsole.php:56
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:40
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:17
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:115
/Users/rory/sites/landlord/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:82

phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
         backupGlobals="false"
         backupStaticAttributes="false"
         bootstrap="vendor/autoload.php"
         colors="true"
         convertErrorsToExceptions="true"
         convertNoticesToExceptions="true"
         convertWarningsToExceptions="true"
         processIsolation="false"
         stopOnFailure="false">
    <testsuites>
        <testsuite name="Unit">
            <directory suffix="Test.php">./tests/Unit</directory>
        </testsuite>

        <testsuite name="Feature">
            <directory suffix="Test.php">./tests/Feature</directory>
        </testsuite>
    </testsuites>
    <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory suffix=".php">./app</directory>
        </whitelist>
    </filter>
    <php>
        <server name="APP_ENV" value="testing"/>
        <server name="BCRYPT_ROUNDS" value="4"/>
        <server name="CACHE_DRIVER" value="array"/>
        <server name="DB_CONNECTION" value="sqlite"/>
        <server name="DB_DATABASE" value=":memory:"/>
        <server name="MAIL_DRIVER" value="array"/>
        <server name="QUEUE_CONNECTION" value="sync"/>
        <server name="SESSION_DRIVER" value="array"/>
    </php>
</phpunit>

Answer 1

将此添加到 Laravel 测试根文件夹中的我的测试用例 class 解决了问题：

protected function setUp(): void
{
    parent::setUp();
}

似乎是 laravel telescope 的问题： https://github.com/laravel/telescope/issues/804

Answer 2

我最终解决了这个问题 - 事实证明这与正在安装的 Telescope 和运行在测试中有关。

要解决此问题（和 ReflectionException: Class env does not exist related issue），请将以下行添加到 phpunit.xml 文件的 <php> 节点之间：

<env name="TELESCOPE_ENABLED" value="false"/>

Answer 3

当我将 php 版本升级到 7.4.3 时，我遇到了非常相似的问题。我输入了这个命令

composer update

在我的控制台中，错误消失了。

Answer 4

我也遇到过类似的问题

我将 PHP 版本升级到 7.4 和运行 composer update，问题已解决。

Answer 5

这解决了我的问题

composer selfupdate

我使用的是旧的 Symfony 4，但对于某些人来说行为应该接近。
Source

在 Laravel 中使用 RefreshDatabase 时尝试访问 null 类型值的数组偏移量

Trying to access array offset on value of type null when using RefreshDatabase in Laravel

php

laravel

laravel-6