function testSubtract() { $_SESSION['test'] = 'MemModel subtract test'; $model1 = new MemModel(); $stat = new Statement(new Resource('http://www.example.org/sub1'), new Resource('http://www.example.org/pred1'), new Resource('http://www.example.org/obj1')); $stat2 = new Statement(new Resource('http://www.example.org/sub2'), new Resource('http://www.example.org/pred2'), new Resource('http://www.example.org/obj2')); $stat3 = new Statement(new Resource('http://www.example.org/sub3'), new Resource('http://www.example.org/pred3'), new Resource('http://www.example.org/obj3')); $model1->add($stat); $model1->add($stat2); $model2 = new MemModel(); $model2->add($stat); $model2->add($stat2); $model2->add($stat3); $res = new MemModel(); $res = $model2->subtract($model1); $this->assertEqual(1, $res->size()); $this->assertTrue($res->contains($stat3)); }