public function testConstructor()
{
$resolver = new CollectionResolver();
// Check if valid instance
$this->assertTrue($resolver instanceof ResolverInterface);
$this->assertTrue($resolver instanceof AggregateResolverAwareInterface);
// Check if set to empty (null argument)
$this->assertSame(array(), $resolver->getCollections());
$resolver = new CollectionResolver(array('key1' => array('value1'), 'key2' => array('value2')));
$this->assertSame(array('key1' => array('value1'), 'key2' => array('value2')), $resolver->getCollections());
}