function testHasValue()
 {
     $m1 = new Money();
     $this->assertFalse($m1->hasValue());
     $m2 = new Money();
     $m2->setValue(array('Currency' => 'EUR', 'Amount' => 3.44));
     $this->assertTrue($m2->hasValue());
     $m3 = new Money();
     $m3->setValue(array('Currency' => 'EUR', 'Amount' => 0));
     $this->assertTrue($m3->hasValue());
 }