<?php
/**
 * @file
 * Test Serial functionality.
 */

/**
 * Class SerialTestCase.
 */
class SerialTestCase extends DrupalWebTestCase {

  const CONTENT_TYPE = 'serial_test_content_type';

  /**
   * @var \SerialFields
   */
  private $fields;

  /**
   * {@inheritdoc}
   */
  public static function getInfo() {
    return array(
      'name' => 'Serial Field',
      'group' => 'Field',
      'description' => 'Testing serial field functionality.',
    );
  }

  /**
   * {@inheritdoc}
   */
  public function setUp() {
    parent::setUp('serial', 'comment');

    $this->drupalCreateContentType(array('type' => static::CONTENT_TYPE));

    $this->fields = new SerialFields(array(
      'serial' => array(
        'type' => SERIAL_FIELD_TYPE,
        'label' => 'Serial',
        'settings' => array(),
      ),
    ));

    $this->fields
      ->create()
      // Attach serial field to content type and comments form.
      ->attach('node', static::CONTENT_TYPE)
      ->attach('comment', 'comment_node_' . static::CONTENT_TYPE);

    // Grant all known permissions for user.
    $this->drupalLogin($this->drupalCreateUser(array_keys(module_invoke_all('permission'))));
  }

  /**
   * Create N nodes and attach N comments for the last.
   *
   * @param int $nodes
   *   Number of nodes for creation.
   * @param int $comments
   *   Number of comments for creation.
   */
  public function testSerial($nodes = 15, $comments = 6) {
    for ($i = 0; $i < $nodes; $i++) {
      // Open form for add new node.
      $this->visit('node/add/' . str_replace('_', '-', static::CONTENT_TYPE));
      // Submit new node with filled title.
      $this->drupalPost(NULL, array('title' => "Node $i"), t('Save'));
    }

    // Go to editing of the last created node.
    $this->visit("node/$nodes/edit");
    // Check that last created node number equal to serial ID.
    $this->assertSerialField($nodes);
    // Go to viewing of the last created node.
    $this->visit("node/$nodes");

    // Post comments for last created node.
    for ($i = 0; $i < $comments; $i++) {
      $this->drupalPost(NULL, array(self::fieldName('comment_body') => "Comment $i"), t('Save'));
    }

    // Go to editing of the last created comment.
    $this->visit("comment/$comments/edit");
    // Ensure the last-posted comment number equal to serial ID.
    $this->assertSerialField($comments);
  }

  /**
   * Assert number with value of the serial field on the page.
   *
   * @param int $number
   *   The number for verification.
   */
  private function assertSerialField($number) {
    $this->assertFieldByXPath($this->constructFieldXpath('name', self::fieldName('serial')), $number);
  }

  /**
   * Visit path and assert response code.
   *
   * @param string $path
   *   Path to visit.
   * @param int $code
   *   Expected response code.
   */
  private function visit($path, $code = 200) {
    $this->drupalGet($path);
    $this->assertResponse($code);
  }

  /**
   * Convert Drupal field name into HTML.
   *
   * @param string $name
   *   Drupal field name.
   * @param string $column
   *   Field column.
   *
   * @return string
   *   HTML input name.
   */
  private static function fieldName($name, $column = 'value') {
    return $name . '[' . LANGUAGE_NONE . '][0][' . $column . ']';
  }

}