public function testSerializerSimple()
 {
     $g = new MongoGraph();
     $g->add_literal_triple("http://example.com/1", $g->qname_to_uri("dct:title"), "some literal title");
     $g->add_resource_triple("http://example.com/1", $g->qname_to_uri("dct:source"), "http://www.google.com");
     $expected = "<http://example.com/1> <http://purl.org/dc/terms/title> \"some literal title\" <http://talisaspire.com/> .\n<http://example.com/1> <http://purl.org/dc/terms/source> <http://www.google.com> <http://talisaspire.com/> .\n";
     $serializer = new NQuadSerializer();
     $actual = $serializer->getSerializedIndex($g->_index, \Tripod\Mongo\Config::getInstance()->getDefaultContextAlias());
     $this->assertEquals($expected, $actual);
 }