public void TestAreaForDetectedSquare()
{
// set size to 30
Box myBox = new Box(30.0f);
Assert.AreEqual(900.0f, myBox.Area());
// reset size to 10
myBox.SetLength(10f);
Assert.AreEqual(100.0f, myBox.Area());
// reset size to 0
myBox.SetLength(0f);
Assert.AreEqual(0f, myBox.Area());
}
