Test utilities

test_utils.php

<?php
/**
 * Test utilities
 */

/**
 * Deterministically figure out if seed is within test group
 *
 * @param string|integer $seed Seed to use, user ID's, paths etc.
 * @param integer        $procentage Sets the inclusive group size. Defaults to 50 %.
 *
 * @return boolean
 */
function is_in_test( $seed, int $procentage = 50 ) {
	if ( 1 > $procentage ) {
		return false;
	}
	if ( 100 <= $procentage ) {
		return true;
	}
	srand( crc32( $seed ) );
	return rand( 0, 100 ) <= $procentage;
}