public void MulDerivativeTest2()
{
// 2x
var num = new Number(2);
var x = new Variable("x");
var exp = new Mul(num, x);
var deriv = Differentiate(exp);
Assert.Equal("2 * 1", deriv.ToString());
num.Value = 3;
Assert.Equal("3 * x", exp.ToString());
Assert.Equal("2 * 1", deriv.ToString());
}
public void DerivativeTest2()
{
// 2x
Number num = new Number(2);
Variable x = new Variable("x");
IExpression exp = new Mul(num, x);
IExpression deriv = exp.Differentiate();
Assert.AreEqual("2 * 1", deriv.ToString());
num.Value = 3;
Assert.AreEqual("3 * x", exp.ToString());
Assert.AreEqual("2 * 1", deriv.ToString());
}
