public function testPropertyInfoWriteThrough()
{
$p23 = new PropertyId('P23');
$p42 = new PropertyId('P42');
$info23 = array(PropertyInfoStore::KEY_DATA_TYPE => 'string');
$info42 = array(PropertyInfoStore::KEY_DATA_TYPE => 'string', 'foo' => 'bar');
$mock = new MockPropertyInfoStore();
$cache = new HashBagOStuff();
$mock->setPropertyInfo($p23, $info23);
$store = new CachingPropertyInfoStore($mock, $cache);
$this->assertEquals($info23, $store->getPropertyInfo($p23), "get from source");
$this->assertEquals($info23, $store->getPropertyInfo($p23), "get cached");
$store->setPropertyInfo($p42, $info42);
$this->assertEquals($info42, $store->getPropertyInfo($p42), "cache updated");
$this->assertEquals($info42, $mock->getPropertyInfo($p42), "source updated");
}