ComposerStagerExceptionTrait.php

<?php

declare (strict_types=1);
namespace Drupal\package_manager_bypass;


/**
 * Trait to make Composer Stager throw pre-determined exceptions in tests.
 *
 * @internal
 */
trait ComposerStagerExceptionTrait {
    
    /**
     * Sets an exception to be thrown.
     *
     * @param string|null $class
     *   The class of exception to throw, or NULL to delete a stored exception.
     * @param mixed ...$arguments
     *   Arguments to pass to the exception constructor.
     */
    public static function setException(?string $class = \Exception::class, mixed ...$arguments) : void {
        if ($class) {
            \Drupal::state()->set(static::class . '-exception', func_get_args());
        }
        else {
            \Drupal::state()->delete(static::class . '-exception');
        }
    }
    
    /**
     * Throws the exception if set.
     */
    private function throwExceptionIfSet() : void {
        if ($exception = $this->state
            ->get(static::class . '-exception')) {
            $class = array_shift($exception);
            throw new $class(...$exception);
        }
    }

}