Let artisan make:test read namespace for tests directory from composer.json

[geoffreyvanwyk]

The other artisan make:* commands read the application's namespace from composer.json. It would make sense for artisan make:test to read the tests directory's namespace from composer.json as well.

One could update \Illuminate\Foundation\Console\TestMakeCommand::rootNamespace() to be similar to \Illuminate\Foundation\Application::getNamespace()

I saw that I could override the artisan make:test command with:

app()->extend('Illuminate\Foundation\Console\TestMakeCommand', function () use ($app) {
    return new App\Commands\TestMakeCommand(app()->make('files'));
});

App\Commands\TestMakeCommand would extend the original and override rootNamespace(). Additionally, getPath() would also need to be overridden to insert a slash between base_path('tests') and str_replace().