How can I write a test for facebook auth in Laravel?

I have done all my normal test but when I reach facebook auth section I do not know what is the best or correct way to make a test for it, my code:

class FacebookAuthController extends Controller
{
    public function redirect()
    {
        return Socialite::driver('facebook')->redirect();
    }

    public function callback()
    {  
        $user = Socialite::driver('facebook')->user();

        $user = User::firstOrCreate(
            ['facebook_id' => $user->id],
            [
                'name' => $user->name,
                'email' => $user->email,
                'facebook_id' => $user->id,
            ]
        );

        Auth::login($user);

        return redirect('/#');
    }
}

Routes

Route::get('/auth/redirect', [FacebookAuthController::class, 'redirect'])->name('facebook.redirect');
Route::get('/auth/callback', [FacebookAuthController::class, 'callback'])->name('facebook.callback');