<?php

/**
 * Test taxonomy upgrades.
 */
class UpgradePathTaxonomyTestCase extends UpgradePathTestCase {
  public static function getInfo() {
    return array(
      'name'  => 'Taxonomy upgrade path',
      'description'  => 'Taxonomy upgrade path tests.',
      'group' => 'Upgrade path',
    );
  }

  public function setUp() {
    // Path to the database dump.
    $this->databaseDumpFiles = array(
     drupal_get_path('module', 'simpletest') . '/tests/upgrade/drupal-6.filled.database.php',
    );
    parent::setUp();
  }

  /**
   * Retrieve an array mapping allowed vocabulary id to field name for
   * all taxonomy_term_reference fields for which an instance exists
   * for the specified entity type and bundle.
   */
  function instanceVocabularies($entity_type, $bundle) {
    $instances = array();
    foreach (field_info_instances($entity_type, $bundle) as $instance) {
      $field = field_info_field($instance['field_name']);
      if ($field['type'] == 'taxonomy_term_reference') {
        foreach ($field['settings']['allowed_values'] as $tree) {
          // Prefer valid taxonomy term reference fields for a given vocabulary
          // when they exist.
          if (empty($instances[$tree['vocabulary']]) || $instances[$tree['vocabulary']] == 'taxonomyextra') {
            $instances[$tree['vocabulary']] = $field['field_name'];
          }
        }
      }
    }
    return $instances;
  }

  /**
   * Basic tests for the taxonomy upgrade.
   */
  public function testTaxonomyUpgrade() {
    $this->assertTrue($this->performUpgrade(), 'The upgrade was completed successfully.');

    // Visit the front page to assert for PHP warning and errors.
    $this->drupalGet('');

    // Check that taxonomy_vocabulary_node_type and taxonomy_term_node have been
    // removed.
    $this->assertFalse(db_table_exists('taxonomy_vocabulary_node_type'), 'taxonomy_vocabulary_node_type has been removed.');
    $this->assertFalse(db_table_exists('taxonomy_term_node'), 'taxonomy_term_node has been removed.');

    // Check that the node type 'page' has been associated to a taxonomy
    // reference field for each vocabulary.
    $voc_keys = array();
    foreach (taxonomy_get_vocabularies() as $vocab) {
      $voc_keys[] = $vocab->machine_name;
    }
    $instances = $this->instanceVocabularies('node', 'page');
    $inst_keys = array_keys($instances);
    sort($voc_keys);
    sort($inst_keys);
    $this->assertEqual($voc_keys, $inst_keys, 'Node type page has instances for every vocabulary.');

    // Ensure instance variables are getting through.
    foreach ($instances as $instance) {
      $this->assertTrue(isset($instance['required']), 'The required setting was preserved during the upgrade path.');
      $this->assertTrue($instance['description'], 'The description was preserved during the upgrade path');
    }

    // Node type 'story' was not explicitly in $vocabulary->nodes but
    // each node of type 'story' was associated to one or more terms.
    // Check that the node type 'story' has been associated only to
    // the taxonomyextra field.
    $instances = $this->instanceVocabularies('node', 'story');
    $field_names = array_flip($instances);
    $this->assertEqual(count($field_names), 1, 'Only one taxonomy term field instance exists for story nodes');
    $this->assertEqual(key($field_names), 'taxonomyextra', 'Only the excess taxonomy term field is used on story nodes');

    // Check that the node type 'poll' has been associated to no taxonomy
    // reference field.
    $instances = $this->instanceVocabularies('node', 'poll');
    $this->assertTrue(empty($instances), 'Node type poll has no taxonomy term reference field instances.');

    // Check that each node of type 'page' and 'story' is associated to all the
    // terms except terms whose ID is equal to the node ID or is equal to the
    // node ID subtracted from 49.
    $nodes = node_load_multiple(array(), array('type' => 'page'));
    $nodes += node_load_multiple(array(), array('type' => 'story'));
    $terms = db_select('taxonomy_term_data', 'td')
      ->fields('td')
      ->orderBy('vid')
      ->orderBy('tid')
      ->execute()
      ->fetchAllAssoc('tid');
    field_attach_prepare_view('node', $nodes, 'full');
    foreach ($nodes as $nid => $node) {
      $node->content = field_attach_view('node', $node, 'full');
      $render = drupal_render($node->content);
      $this->drupalSetContent($render);
      $this->verbose($render);

      $vocabulary_seen = array();
      foreach ($terms as $tid => $term) {
        // In our test database, each node is arbitrary associated with all
        // terms except two: one whose tid is ($nid) and one whose tid is
        // (49 - $nid).
        $should_be_displayed = ($tid != $nid) && ($tid + $nid != 49);

        // Only vocabularies 13 to 24 are properly associated with the node
        // type 'page'. All other node types are not associated with any
        // vocabulary, but still are associated with terms. Those terms
        // will be moved to the taxonomy extra field.
        if ($node->type == 'page' && $term->vid >= 13 && $term->vid <= 24) {
          $vocabulary = taxonomy_vocabulary_load($term->vid);
          $field_class = 'field-name-' . strtr('taxonomy_' . $vocabulary->machine_name, '_', '-');;
        }
        else {
          $field_class = 'field-name-taxonomyextra';
        }

        // Odd vocabularies are single, so any additional term will be moved
        // to the taxonomy extra field.
        if ($should_be_displayed) {
          if ($term->vid % 2 == 1 && !empty($vocabulary_seen[$term->vid])) {
            $field_class = 'field-name-taxonomyextra';
          }
          $vocabulary_seen[$term->vid] = TRUE;
        }

        $args = array(
          '%name' => $term->name,
          '@field' => $field_class,
          '%nid' => $nid,
        );

        // Use link rather than term name because migrated term names can be
        // substrings of other term names. e.g. "term 1 of vocabulary 2" is
        // found when "term 1 of vocabulary 20" is output.
        $term_path = url('taxonomy/term/' . $term->tid);
        if (!$should_be_displayed) {
          // Look for any link with the term path.
          $links = $this->xpath('//a[@href=:term_path]', array(':term_path' => $term_path));
          $this->assertFalse($links, format_string('Term %name (@field) is not displayed on node %nid', $args));
        }
        else {
          // Look for a link with the term path inside the correct field.
          // We search for "SPACE + class + SPACE" to avoid matching a substring
          // of the class.
          $links = $this->xpath('//div[contains(concat(" ", normalize-space(@class), " "), :field_class)]//a[@href=:term_path]', array(':field_class' => ' ' . $field_class . ' ', ':term_path' => $term_path));
          $this->assertTrue($links, format_string('Term %name (@field) is displayed on node %nid', $args));
        }
      }

      // nid 1, revision 1 had a bogus record in {term_node} pointing to term
      // ID 0. Make sure we ignored this instead of generating a bogus term.
      if ($node->nid == 1) {
        $link = l($term->name, 'taxonomy/term/0');
        $this->assertNoRaw($link, format_string('Bogus term (tid 0) is not displayed on node 1 vid %old_vid.', $args));
      }

      // The first 12 nodes have two revisions. For nodes with
      // revisions, check that the oldest revision is associated only
      // to terms whose ID is equal to the node ID or 49 less the node ID.
      $revisions = node_revision_list($node);
      if ($node->nid < 13) {
        $this->assertEqual(count($revisions), 2, format_string('Node %nid has two revisions.', $args));
        $last_rev = end($revisions);
        $args['%old_vid'] = $last_rev->vid;

        $node_old = node_load($node->nid, $last_rev->vid);
        field_attach_prepare_view('node', array($node_old->nid => $node_old), 'full');
        $node_old->content = field_attach_view('node', $node_old, 'full');
        $render = drupal_render($node_old->content);
        $this->drupalSetContent($render);
        $this->verbose($render);

        $term = $terms[$node->nid];
        $link = l($term->name, 'taxonomy/term/' . $term->tid);
        $this->assertRaw($link, format_string('Term %name (@field) is displayed on node %nid vid %old_vid.', $args));
        $term = $terms[49-$node->nid];
        $link = l($term->name, 'taxonomy/term/' . $term->tid);
        $this->assertRaw($link, format_string('Term %name (@field) is displayed on node %nid %old_vid.', $args));
      }
      else {
        $this->assertEqual(count($revisions), 1, format_string('Node %nid has one revision.', $args));
      }
    }
  }
}