/**
	 * Combine this Validation Result with the ValidationResult given in other.
	 * It will be valid if both this and the other result are valid.
	 * This object will be modified to contain the new validation information.
	 */
	function combineAnd(ValidationResult $other) {
		$this->isValid = $this->isValid && $other->valid();
		$this->errorList = array_merge($this->errorList, $other->messageList());
	}
 /**
  * Test combining validation results together
  */
 public function testCombineResults()
 {
     $result = new ValidationResult();
     $anotherresult = new ValidationResult();
     $yetanotherresult = new ValidationResult();
     $anotherresult->error("Eat with your mouth closed", "EATING101");
     $yetanotherresult->error("You didn't wash your hands", "BECLEAN");
     $this->assertTrue($result->valid());
     $this->assertFalse($anotherresult->valid());
     $this->assertFalse($yetanotherresult->valid());
     $result->combineAnd($anotherresult)->combineAnd($yetanotherresult);
     $this->assertFalse($result->valid());
     $this->assertEquals(array("EATING101" => "Eat with your mouth closed", "BECLEAN" => "You didn't wash your hands"), $result->messageList());
 }