Inheritance: XmlBrick, IChangeVolumeByNBrick
        public void XmlChangeVolumeByBrickTest()
        {
            TextReader sr = new StringReader("<brick type=\"ChangeVolumeByNBrick\"> <formulaList> <formula category=\"VOLUME_CHANGE\"> <rightChild> <type>NUMBER</type> <value>80</value> </rightChild> <type>OPERATOR</type> <value>MINUS</value> </formula> </formulaList> </brick>");
            var xRoot = XElement.Load(sr);

            var testObject = new XmlChangeVolumeByBrick(xRoot);

            var referenceObject = new XmlChangeVolumeByBrick()
            {
                VolumeXML = new XmlFormula(xRoot, XmlConstants.VolumeChange),
            };

            Assert.AreEqual(referenceObject, testObject);
        }
 public bool Equals(XmlChangeVolumeByBrick b)
 {
     return this.Equals((XmlBrick)b) && this.VolumeXML.Equals(b.VolumeXML);
 }