/**
* Test page_diff_viewed event.
*/
public function test_page_diff_viewed()
{
// There is no proper API to call or trigger this event, so simulating event
// to check if event returns the right information.
$this->setUp();
$page = $this->wikigenerator->create_first_page($this->wiki);
$context = context_module::instance($this->wiki->cmid);
$params = array('context' => $context, 'objectid' => $page->id, 'other' => array('comparewith' => 1, 'compare' => 2));
$event = \mod_wiki\event\page_diff_viewed::create($params);
// Triggering and capturing the event.
$sink = $this->redirectEvents();
$event->trigger();
$events = $sink->get_events();
$this->assertCount(1, $events);
$event = reset($events);
// Checking that the event contains the expected values.
$this->assertInstanceOf('\\mod_wiki\\event\\page_diff_viewed', $event);
$this->assertEquals($context, $event->get_context());
$this->assertEquals($page->id, $event->objectid);
$expected = array($this->course->id, 'wiki', 'diff', 'diff.php?pageid=' . $page->id . '&comparewith=' . 1 . '&compare=' . 2, $page->id, $this->wiki->cmid);
$this->assertEventLegacyLogData($expected, $event);
$this->assertEventContextNotUsed($event);
}
$pageid = required_param('pageid', PARAM_TEXT);
$compare = required_param('compare', PARAM_INT);
$comparewith = required_param('comparewith', PARAM_INT);
if (!($page = wiki_get_page($pageid))) {
print_error('incorrectpageid', 'wiki');
}
if (!($subwiki = wiki_get_subwiki($page->subwikiid))) {
print_error('incorrectsubwikiid', 'wiki');
}
if (!($wiki = wiki_get_wiki($subwiki->wikiid))) {
print_error('incorrectwikiid', 'wiki');
}
if (!($cm = get_coursemodule_from_instance('wiki', $wiki->id))) {
print_error('invalidcoursemodule');
}
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
if ($compare >= $comparewith) {
print_error("A page version can only be compared with an older version.");
}
require_login($course, true, $cm);
$wikipage = new page_wiki_diff($wiki, $subwiki, $cm);
$wikipage->set_page($page);
$wikipage->set_comparison($compare, $comparewith);
$event = \mod_wiki\event\page_diff_viewed::create(array('context' => context_module::instance($cm->id), 'objectid' => $pageid, 'other' => array('comparewith' => $comparewith, 'compare' => $compare)));
$event->add_record_snapshot('wiki_pages', $page);
$event->add_record_snapshot('wiki', $wiki);
$event->add_record_snapshot('wiki_subwikis', $subwiki);
$event->trigger();
$wikipage->print_header();
$wikipage->print_content();
$wikipage->print_footer();