public void Cube_Test()
{
var calculator = new Calculator1();
Assert.AreEqual(-125, calculator.Cube(-5));
Assert.AreEqual(1000, calculator.Cube(10));
Assert.AreEqual(3.375, calculator.Cube(1.5));
Assert.AreEqual(1, calculator.Cube(1));
Assert.AreEqual(0, calculator.Cube(0));
}