使用INPUT_POST时如何测试我的功能？

I use filter_input_array PHP function when sanitizing data inputs in my application. Consider example below:

public function acquireData()
{
    $args = array(
        'model' => FILTER_SANITIZE_STRING,
    );

    //function that sanitizes input from POST
    $output = filter_input_array(INPUT_POST, $args);

    return $output;
}

It works fine when I read live POST data from a web browser. But when I want to pass in another array for the purposes of testing I struggle to find a solution.

i.e. using my own array does not work and produces empty $output:

$myInputArray = array('model' => 'ABC'); //with same parameters as $_POST
$output = filter_input_array($myInputArray, $args);
//$output is null;

Note

I want to specifically use INPUT_POST construct. Or get an answer "it is not possible" or "you can only seek work-arounds".

i.e. using filter_var_array is a work-around, because it does not use INPUT_POST. Example work-around below:

$output = filter_var_array($_POST, $args);

Until I know better, there only seems to be a work-around:

$output = filter_var_array($_POST, $args)

In other words, when you want to test using your own array, either write another function to sanitize inputs for your own array, or use filter_var_array instead of filter_input_array.

filter_input_array appears to be just a convenience function. Instead of providing the specific variable containing the inputs, you provide a constant that specifies one of a standard set of global variables that can be filtered automatically. So

filter_input_array(INPUT_POST, $args);

is equivalent to:

filter_var_array($_POST, $args);