Unit Testing Authorize attribute policy

Hi, I would like to test my controller

[Authorize(Policy = "CatalogManager")]
[HttpPut("update")]
public async Task<IActionResult> Update([FromBody] ProductForEditViewModel productForEditViewModel)
{

}

I would like to vérify that only CatalogManager can fire this action.  how can I mock [Authorize(Policy = "CatalogManager")]  attribute?

Best regards