drush_plugin__composer_check/ComposerCheck/Tests/LockLoaderTest.php

<?php

namespace Fgm\ComposerCheck\Tests;

use Fgm\ComposerCheck\LockLoader;

/**
 * Class TestLoader allows faking the composer.lock file contents.
 */
class TestLoader extends LockLoader {
  public function  __construct(string $directory) {
  }

  public function setData($data) {
    $this->contents['packages'] = $data['packages'];
    $this->contents['packages-dev'] = $data['packages-dev'];
    $this->contents['platform'] = $data['platform'];
  }
}

/**
 * Class LockLoaderTest
 *
 * @coversDefaultClass Fgm\ComposerCheck\LockLoader
 */
class LockLoaderTest extends \PHPUnit_Framework_TestCase {

  /**
   * @return array $lock
   *   An array of simplified versions of lock data.
   */
  public function lockParsingProvider() {
    return [
      [[
        'packages' => [
          'r1' => 'R1',
        ],
        'packages-dev' => [
          'd1' => 'D1',
        ],
        'platform' => [
          'p1' => 'P1',
        ],
      ]],
    ];
  }

  /**
   * @dataProvider lockParsingProvider
   */
  public function testLockParsing($lockData) {
    $loader = new TestLoader("");
    $loader->setData($lockData);
    $loader->parse();
    $actualRun = $loader->getRun();
    $actualDev = $loader->getDev();
    
  }
}