扩展抽象测试类时找不到测试类

我目前正在使用lumen框架(v5.6)并为我的代码编写单元测试。

我有一个基本类 TestCase :

namespace Tests;

$_SERVER["http_proxy"] = "";

abstract class TestCase extends \Laravel\Lumen\Testing\TestCase
{
    /**
     * Creates the application.
     *
     * @return \Laravel\Lumen\Application
     */
    public function createApplication()
    {
        return require __DIR__.'/../bootstrap/app.php';
    }
}

namespace Tests\App\IO;

use App\io\PageDataParser;
use App\Models\AdvancedArray;
use App\Services\PageService;
use Mockery;
use Tests\TestCase;

abstract class ParsePageDataTestCase extends TestCase
{

    // Test logic here, but not relevant for the question

}

最后我在实际测试中使用了这个抽象类:

namespace Tests\App\IO;

use App\io\JsonPageDataParser;
use App\Models\AdvancedArray;

class JsonParsePageDataTestCaseTest extends ParsePageDataTestCase
{

   // Test are here, but not relevant for the question
}

JsonParsePageDataTestCaseTest 我得到以下错误:

PHP致命错误:在第15行的\Tests\app\io\JsonParsePageDataTest.PHP中找不到类“Tests\ParsePageDataTestCase”

and verified that my has an entry which specifies a classmap to 'tests/

我使用phpunit.xml执行测试,它加载 bootstrap/app.php ,但我仍然得到这个错误。

phpunit.xml :

<?xml version="1.0" encoding="UTF-8"?>
<phpunit backupGlobals="false"
         backupStaticAttributes="false"
         bootstrap="bootstrap/app.php"
         colors="true"
         convertErrorsToExceptions="true"
         convertNoticesToExceptions="true"
         convertWarningsToExceptions="true"
         processIsolation="false"
         stopOnFailure="false">
    <testsuites>
        <testsuite name="Application test Suite">
            <directory suffix="Test.php">./tests</directory>
        </testsuite>
    </testsuites>
    <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory suffix=".php">./app</directory>
        </whitelist>
    </filter>
    <php>
           <!-- ENV variables go here -->

    </php>
</phpunit> 

最后我的 composer.json :

{
    "name": "laravel/lumen",
    "description": "The Laravel Lumen Framework.",
    "keywords": ["framework", "laravel", "lumen"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=7.1.3",
        "laravel/lumen-framework": "5.6.*",
        "vlucas/phpdotenv": "~2.2",
        "willdurand/hateoas": "~2.1",
        "guzzlehttp/guzzle": "~6.0",
        "ext-json": "*",
        "vinelab/neoeloquent": "^1.4.6",
        "jenssegers/mongodb": "3.4.*",
        "predis/predis": "~1.0"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "phpunit/phpunit": "~7.0",
        "mockery/mockery": "~1.0",
        "barryvdh/laravel-ide-helper": "~2.5"
    },
    "autoload": {
        "classmap": [
            "database/seeds",
            "database/factories"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "classmap": [
            "tests/"
        ]
    },
    "scripts": {
        "post-root-package-install": [
            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ]
    },
    "config": {
        "preferred-install": "dist",
        "sort-packages": true,
        "optimize-autoloader": true
    },
    "minimum-stability": "dev",
    "prefer-stable": true
}

提前谢谢!