public void DerivativeTest2() { Number num1 = new Number(2); Variable x = new Variable("x"); Mul mul1 = new Mul(num1, x); Number num2 = new Number(3); Mul mul2 = new Mul(num2, x.Clone()); IExpression exp = new Sub(mul1, mul2); IExpression deriv = exp.Differentiate(); Assert.AreEqual("(2 * 1) - (3 * 1)", deriv.ToString()); num1.Value = 5; num2.Value = 4; Assert.AreEqual("(5 * x) - (4 * x)", exp.ToString()); Assert.AreEqual("(2 * 1) - (3 * 1)", deriv.ToString()); }
public void SubDerivativeTest2() { var num1 = new Number(2); var x = new Variable("x"); var mul1 = new Mul(num1, x); var num2 = new Number(3); var mul2 = new Mul(num2, x.Clone()); var exp = new Sub(mul1, mul2); var deriv = Differentiate(exp); Assert.Equal("(2 * 1) - (3 * 1)", deriv.ToString()); num1.Value = 5; num2.Value = 4; Assert.Equal("(5 * x) - (4 * x)", exp.ToString()); Assert.Equal("(2 * 1) - (3 * 1)", deriv.ToString()); }