Allow PhpUnit Environment Variables to override Cached Configs

TestCase.php

<?php

class TestCase
{
    /**
     * @inheritDoc
     */
    protected function setUpTraits()
    {
        $this->artisan('optimize:clear');
        $this->app = $this->createApplication();
        $this->artisan('optimize');

//        //This behavior is lifted from Illuminate\Foundation\Bootstrap\LoadConfiguration.
//        //It prevents cached configs from overriding those established by phpunit.xml
//        $configPath = realpath($this->app->configPath());
//
//        $files = collect(Finder::create()->files()->name('*.php')->in($configPath))
//            ->mapWithKeys(function (SplFileInfo $file) use ($configPath) {
//                $directory = trim(str_replace($configPath, '', $file->getPath()), DIRECTORY_SEPARATOR);
//                $directory = $directory ? str_replace(DIRECTORY_SEPARATOR, '.', $directory).'.' : $directory;
//
//                return [$directory.basename($path = $file->getRealPath(), '.php') => $path];
//            });
//
//        $set = fn (Repository $config, string $path, string $key): Repository => tap($config)->set($key, require $path);
//        $files->sortKeys(SORT_NATURAL)->reduce($set, config());
//
//        \DB::setDefaultConnection(config('database.default'));

        return parent::setUpTraits();
    }
    
    /**
     * @inheritDoc
     */
    public function call($method, $uri, $parameters = [], $cookies = [], $files = [], $server = [], $content = null)
    {
        $files = array_merge($files, $this->extractFilesFromDataArray($parameters));
        $symfonyRequest = SymfonyRequest::create(
            $this->prepareUrlForRequest($uri), $method, $parameters,
            $cookies, $files, array_replace($this->serverVariables, $server), $content
        );
        $request = Request::createFromBase($symfonyRequest);

        request()->query = $request->query;
        request()->attributes = $request->attributes;
        request()->request = $request->request;
        request()->headers = $request->headers;
        request()->server = $request->server;
        request()->files = $request->files;
        request()->cookies = $request->cookies;
        request()->setMethod($request->getMethod());
        request()->setJson($request->json());
        request()->setRouteResolver($request->getRouteResolver());
        request()->setUserResolver($request->getUserResolver());
        request()->setLaravelSession($request->getSession());
        request()->setLocale($request->getLocale());

        return parent::call($method, $uri, $parameters, $cookies, $files, $server, $content);
    }
}