public function testParse()
 {
     $ARNode = $this->ERXPath->evaluate('//AssociationRule')->item(0);
     $AR = new AssociationRule($ARNode, $this->ER, $this->attributes, $this->IMs, $this->DBAP, $this->BBAP);
     $AR->parse();
     $data = $AR->toArray();
     $this->assertEquals(1, count($data['antecedent']));
     $this->assertEquals(1, count($data['IM']));
     $this->assertEquals(1, count($data['consequent']));
 }