class NodeRevisionsAllTest

class NodeRevisionsAllTest extends NodeTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * A list of nodes created to be used as starting point of different tests.
     *
     * @var Drupal\node\NodeInterface[]
     */
    protected $nodes;
    
    /**
     * Revision logs of nodes created by the setup method.
     *
     * @var string[]
     */
    protected $revisionLogs;
    
    /**
     * An arbitrary user for revision authoring.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $revisionUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        // Create and log in user.
        $web_user = $this->drupalCreateUser([
            'view page revisions',
            'revert page revisions',
            'delete page revisions',
            'edit any page content',
            'delete any page content',
        ]);
        $this->drupalLogin($web_user);
        // Create an initial node.
        $node = $this->drupalCreateNode();
        // Create a user for revision authoring.
        // This must be different from user performing revert.
        $this->revisionUser = $this->drupalCreateUser();
        $settings = get_object_vars($node);
        $settings['revision'] = 1;
        $nodes = [];
        $logs = [];
        // Get the original node.
        $nodes[] = clone $node;
        // Create three revisions.
        $revision_count = 3;
        for ($i = 0; $i < $revision_count; $i++) {
            $logs[] = $node->revision_log = $this->randomMachineName(32);
            $node = $this->createNodeRevision($node);
            $nodes[] = clone $node;
        }
        $this->nodes = $nodes;
        $this->revisionLogs = $logs;
    }
    
    /**
     * Creates a new revision for a given node.
     *
     * @param \Drupal\node\NodeInterface $node
     *   A node object.
     *
     * @return \Drupal\node\NodeInterface
     *   A node object with up to date revision information.
     */
    protected function createNodeRevision(NodeInterface $node) {
        // Create revision with a random title and body and update variables.
        $node->title = $this->randomMachineName();
        $node->body = [
            'value' => $this->randomMachineName(32),
            'format' => filter_default_format(),
        ];
        $node->setNewRevision();
        // Ensure the revision author is a different user.
        $node->setRevisionUserId($this->revisionUser
            ->id());
        $node->save();
        return $node;
    }
    
    /**
     * Checks node revision operations.
     */
    public function testRevisions() {
        $node_storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $nodes = $this->nodes;
        $logs = $this->revisionLogs;
        // Get last node for simple checks.
        $node = $nodes[3];
        // Create and log in user.
        $content_admin = $this->drupalCreateUser([
            'view all revisions',
            'revert all revisions',
            'delete all revisions',
            'edit any page content',
            'delete any page content',
        ]);
        $this->drupalLogin($content_admin);
        // Confirm the correct revision text appears on "view revisions" page.
        $this->drupalGet("node/" . $node->id() . "/revisions/" . $node->getRevisionId() . "/view");
        $this->assertText($node->body->value, 'Correct text displays for version.');
        // Confirm the correct revision log message appears on the "revisions
        // overview" page.
        $this->drupalGet("node/" . $node->id() . "/revisions");
        foreach ($logs as $revision_log) {
            $this->assertText($revision_log, 'Revision log message found.');
        }
        // Confirm that this is the current revision.
        $this->assertTrue($node->isDefaultRevision(), 'Third node revision is the current one.');
        // Confirm that revisions revert properly.
        $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/revert", [], t('Revert'));
        $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', [
            '@type' => 'Basic page',
            '%title' => $nodes[1]->getTitle(),
            '%revision-date' => $this->container
                ->get('date.formatter')
                ->format($nodes[1]->getRevisionCreationTime()),
        ]), 'Revision reverted.');
        $node_storage->resetCache([
            $node->id(),
        ]);
        $reverted_node = $node_storage->load($node->id());
        $this->assertTrue($nodes[1]->body->value == $reverted_node->body->value, 'Node reverted correctly.');
        // Confirm the revision author is the user performing the revert.
        $this->assertTrue($reverted_node->getRevisionUserId() == $this->loggedInUser
            ->id(), 'Node revision author is user performing revert.');
        // And that its not the revision author.
        $this->assertTrue($reverted_node->getRevisionUserId() != $this->revisionUser
            ->id(), 'Node revision author is not original revision author.');
        // Confirm that this is not the current version.
        $node = node_revision_load($node->getRevisionId());
        $this->assertFalse($node->isDefaultRevision(), 'Third node revision is not the current one.');
        // Confirm that the node can still be updated.
        $this->drupalPostForm("node/" . $reverted_node->id() . "/edit", [
            'body[0][value]' => 'We are Drupal.',
        ], t('Save'));
        $this->assertText(t('Basic page @title has been updated.', [
            '@title' => $reverted_node->getTitle(),
        ]), 'Node was successfully saved after reverting a revision.');
        $this->assertText('We are Drupal.', 'Node was correctly updated after reverting a revision.');
        // Confirm revisions delete properly.
        $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[1]->getRevisionId() . "/delete", [], t('Delete'));
        $this->assertRaw(t('Revision from %revision-date of @type %title has been deleted.', [
            '%revision-date' => $this->container
                ->get('date.formatter')
                ->format($nodes[1]->getRevisionCreationTime()),
            '@type' => 'Basic page',
            '%title' => $nodes[1]->getTitle(),
        ]), 'Revision deleted.');
        $connection = Database::getConnection();
        $this->assertTrue($connection->query('SELECT COUNT(vid) FROM {node_revision} WHERE nid = :nid and vid = :vid', [
            ':nid' => $node->id(),
            ':vid' => $nodes[1]->getRevisionId(),
        ])
            ->fetchField() == 0, 'Revision not found.');
        // Set the revision timestamp to an older date to make sure that the
        // confirmation message correctly displays the stored revision date.
        $old_revision_date = REQUEST_TIME - 86400;
        $connection->update('node_revision')
            ->condition('vid', $nodes[2]->getRevisionId())
            ->fields([
            'revision_timestamp' => $old_revision_date,
        ])
            ->execute();
        $this->drupalPostForm("node/" . $node->id() . "/revisions/" . $nodes[2]->getRevisionId() . "/revert", [], t('Revert'));
        $this->assertRaw(t('@type %title has been reverted to the revision from %revision-date.', [
            '@type' => 'Basic page',
            '%title' => $nodes[2]->getTitle(),
            '%revision-date' => $this->container
                ->get('date.formatter')
                ->format($old_revision_date),
        ]));
        // Create 50 more revisions in order to trigger paging on the revisions
        // overview screen.
        $node = $nodes[0];
        for ($i = 0; $i < 50; $i++) {
            $logs[] = $node->revision_log = $this->randomMachineName(32);
            $node = $this->createNodeRevision($node);
            $nodes[] = clone $node;
        }
        $this->drupalGet('node/' . $node->id() . '/revisions');
        // Check that the pager exists.
        $this->assertRaw('page=1');
        // Check that the last revision is displayed on the first page.
        $this->assertText(end($logs));
        // Go to the second page and check that one of the initial three revisions
        // is displayed.
        $this->clickLink(t('Page 2'));
        $this->assertText($logs[2]);
    }

}