Show the modules that are installed that aren't part of a test suite (for use with recipes)

missing-tests.php

<?php
$lock = json_decode(file_get_contents("composer.lock"), true);
$testXML = file_get_contents('phpunit.xml.dist');
foreach ($lock['packages'] as $package) {
    if (strpos($package['type'], 'silverstripe') !== false && strpos($testXML, $package['name']) === false) {
        // Attempt to locate a test folder
        $directory = 'vendor' . DIRECTORY_SEPARATOR . str_replace('/', DIRECTORY_SEPARATOR, $package['name']). DIRECTORY_SEPARATOR;

        if (is_dir($directory) && is_dir($directory .'tests')) {
            echo $package['name'].PHP_EOL;
        }
    }
}