public void MultiplyNegatives()
 {
     Assert.AreEqual(15, BitOp.Multiply(-5, -3));
 }
 public void MultiplyNegativeAndAPositive()
 {
     Assert.AreEqual(-7, BitOp.Multiply(7, -1));
 }
 public void MultiplyPositives()
 {
     Assert.AreEqual(32, BitOp.Multiply(4, 8));
 }