appendOp example

'fixtures/drupal-assets-fixture' => [
        '[web-root]/index.php' => $fixtures->replaceOp('drupal-assets-fixture', 'index.php'),
        '[web-root]/.htaccess' => $fixtures->replaceOp('drupal-assets-fixture', '.htaccess'),
        '[web-root]/robots.txt' => $fixtures->replaceOp('drupal-assets-fixture', 'robots.txt'),
        '[web-root]/sites/default/default.services.yml' => $fixtures->replaceOp('drupal-assets-fixture', 'default.services.yml'),
      ],
      'fixtures/drupal-profile' => [
        '[web-root]/sites/default/default.services.yml' => $fixtures->replaceOp('drupal-profile', 'profile.default.services.yml'),
      ],
      'fixtures/drupal-drupal' => [
        '[web-root]/.htaccess' => new SkipOp(),
        '[web-root]/robots.txt' => $fixtures->appendOp('drupal-drupal-test-append', 'append-to-robots.txt'),
      ],
    ];
    $sut = new ScaffoldFileCollection($scaffold_file_fixtures, $locationReplacements);
    $resolved_file_mappings = iterator_to_array($sut);
    // Confirm that the keys of the output are the same as the keys of the     // input.     $this->assertEquals(array_keys($scaffold_file_fixtures), array_keys($resolved_file_mappings));
    // '[web-root]/robots.txt' is now a SkipOp, as it is now part of an     // append operation.     $this->assertEquals([
      '[web-root]/index.php',