public function testAddExtensionFilter()
{
$this->assertAttributeEmpty('extensionFilters', $this->handler);
$actionKey = 'action';
$entityKey = 'entity';
$defaultGroup = 'default';
$this->handler->addExtensionFilter($actionKey, $defaultGroup);
$this->handler->addExtensionFilter($entityKey, $defaultGroup);
$expectedFilters = [$actionKey => [$defaultGroup], $entityKey => [$defaultGroup]];
$this->assertAttributeEquals($expectedFilters, 'extensionFilters', $this->handler);
// each group added only once
$this->handler->addExtensionFilter($actionKey, $defaultGroup);
$this->handler->addExtensionFilter($entityKey, $defaultGroup);
$this->assertAttributeEquals($expectedFilters, 'extensionFilters', $this->handler);
}
