function test_update_with_zero_removals_becomes_an_insert()
 {
     $fake_request_factory = new FakeRequestFactory();
     $fake_response = new HttpResponse();
     $fake_response->status_code = 200;
     $fake_response->body = $this->_select_result_zero_results;
     $query = "select ?_uri ?name where { optional {?_uri <http://example.org/name> ?name. } }";
     $fake_request = new FakeHttpRequest($fake_response);
     $fake_request_factory->register('GET', "http://example.org/store/services/sparql?query=" . urlencode($query) . '&output=json', $fake_request);
     $fake_request_post = new FakeHttpRequest(new HttpResponse());
     $fake_request_factory->register('POST', "http://example.org/store/meta", $fake_request_post);
     $dt = new DataTable("http://example.org/store", null, $fake_request_factory);
     $dt->map('http://example.org/name', 'name');
     $dt->set('name', 'foo');
     $dt->update();
     $g = $dt->get_insert_graph();
     $this->assertEquals($g->to_turtle(), $fake_request_post->get_body());
 }