function testArgumentValidateUserUid() {
$account = $this->account;
// test 'uid' case
$view = $this
->view_argument_validate_user('uid');
$this
->assertTrue($view->argument['null']
->validateArgument($account->uid));
// Reset safed argument validation.
$view->argument['null']->argument_validated = NULL;
// Fail for a string variable since type is 'uid'
$this
->assertFalse($view->argument['null']
->validateArgument($account->name));
// Reset safed argument validation.
$view->argument['null']->argument_validated = NULL;
// Fail for a valid numeric, but for a user that doesn't exist
$this
->assertFalse($view->argument['null']
->validateArgument(32));
}