public function testPurge()
{
$locationIds = array(123, 456, 789);
$this->purgeClient->expects($this->once())->method('purge')->with($locationIds)->will($this->returnArgument(0));
$purger = new InstantCachePurger($this->purgeClient, $this->contentService, $this->eventDispatcher);
$this->assertSame($locationIds, $purger->purge($locationIds));
}