function test_remove_all_triples()
{
$g = new SimpleGraph();
$g->add_resource_triple('http://example.org/subj', 'http://example.org/pred', 'http://example.org/obj');
$g->add_resource_triple('http://example.org/subj', 'http://example.org/pred', 'http://example.org/obj2');
$this->assertEquals(2, count($g->get_triples()));
$g->remove_all_triples();
$this->assertEquals(0, count($g->get_triples()));
}
