public function testWriteWithoutVersion()
{
$original = new SiteTree();
$original->write();
// Create a second version (different behaviour),
// as SiteTree->onAfterWrite() checks for Version == 1
$original->Title = 'prepare';
$original->write();
$originalVersion = $original->Version;
$virtual = new VirtualPage();
$virtual->CopyContentFromID = $original->ID;
$virtual->write();
// Create a second version, see above.
$virtual->Title = 'prepare';
$virtual->write();
$virtualVersion = $virtual->Version;
$virtual->Title = 'changed 1';
$virtual->writeWithoutVersion();
$this->assertEquals($virtual->Version, $virtualVersion, 'writeWithoutVersion() on VirtualPage doesnt increment version');
$original->Title = 'changed 2';
$original->writeWithoutVersion();
DataObject::flush_and_destroy_cache();
$virtual = DataObject::get_by_id('VirtualPage', $virtual->ID, false);
$this->assertEquals($virtual->Version, $virtualVersion, 'writeWithoutVersion() on original page doesnt increment version on related VirtualPage');
$original->Title = 'changed 3';
$original->write();
DataObject::flush_and_destroy_cache();
$virtual = DataObject::get_by_id('VirtualPage', $virtual->ID, false);
$this->assertGreaterThan($virtualVersion, $virtual->Version, 'write() on original page does increment version on related VirtualPage');
}