AssetManager\Resolver\PrioritizedPathsResolver::addPath PHP Method

    public function addPath($path)
    {
        if (is_string($path)) {
            $this->paths->insert($this->normalizePath($path), 1);
            return;
        }
        if (!is_array($path) && !$path instanceof ArrayAccess) {
            throw new Exception\InvalidArgumentException(sprintf('Provided path must be an array or an instance of ArrayAccess, %s given', is_object($path) ? get_class($path) : gettype($path)));
        }
        if (isset($path['priority']) && isset($path['path'])) {
            $this->paths->insert($this->normalizePath($path['path']), $path['priority']);
            return;
        }
        throw new Exception\InvalidArgumentException('Provided array must contain both keys "priority" and "path"');
    }

 public function testWillRefuseInvalidPath()
 {
     $resolver = new PrioritizedPathsResolver();
     $this->setExpectedException('AssetManager\\Exception\\InvalidArgumentException');
     $resolver->addPath(null);
 }