未找到laravel autoload classmap类

Question

我的工厂目录（database\factories\FactoryHelpers.php）

中有一些助手

<?php

class FactoryHelpers
{ 
...
}

现在我尝试在我的测试中使用它，并获得class FactoryHelpers not found

我以为放

"classmap": [
            "database/factories"
        ],

在我的作曲家文件中应该足以使FactoryHelpers类全局可用。

编辑：

composer.json

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=7.0.0",
        "barryvdh/laravel-cors": "^0.9.3",
        "fideloper/proxy": "~3.3",
        "guzzlehttp/guzzle": "^6.0",
        "laravel/framework": "5.5.*",
        "laravel/tinker": "~1.0",
        "webpatser/laravel-uuid": "^3.0"
    },
    "require-dev": {
        "barryvdh/laravel-ide-helper": "v2.4.1",
        "codeception/codeception": "^2.3",
        "doctrine/dbal": "^2.6",
        "filp/whoops": "~2.0",
        "fzaninotto/faker": "~1.4",
        "krlove/eloquent-model-generator": "^1.2",
        "mockery/mockery": "0.9.*",
        "mpociot/laravel-test-factory-helper": "^0.5.0",
        "phpunit/phpunit": "~6.0"
    },
    "autoload": {
        "classmap": [
            "database/seeds",
            "database/factories"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "extra": {
        "laravel": {
            "dont-discover": [
            ]
        }
    },
    "scripts": {
        "post-root-package-install": [
            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "@php artisan key:generate"
        ],
        "post-autoload-dump": [
            "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
            "@php artisan package:discover"
        ]
    },
    "config": {
        "preferred-install": "dist",
        "sort-packages": true,
        "optimize-autoloader": true
    }
}