assertCommentAccess example

$this->node = $this->drupalCreateNode(['type' => 'article']);

    // Post a comment using 'Full HTML' text format.     $edit_comment = [];
    $edit_comment['subject[0][value]'] = $this->commentSubject;
    $edit_comment['comment_body[0][value]'] = '<h1>' . $comment_body . '</h1>';
    $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
    $this->submitForm($edit_comment, 'Save');

    $this->drupalLogout();
    $this->setRolePermissions(RoleInterface::ANONYMOUS_ID);
    $this->assertCommentAccess(FALSE, 'Anon user has search permission but no access comments permission, comments should not be indexed');

    $this->setRolePermissions(RoleInterface::ANONYMOUS_ID, TRUE);
    $this->assertCommentAccess(TRUE, 'Anon user has search permission and access comments permission, comments should be indexed');

    $this->drupalLogin($this->adminUser);
    $this->drupalGet('admin/people/permissions');

    // Disable search access for authenticated user to test admin user.     $this->setRolePermissions(RoleInterface::AUTHENTICATED_ID, FALSE, FALSE);

    $this->setRolePermissions($this->adminRole);