public void SubstitutionSimpleTest()
{
BaseExpression exprExpected = BaseExpression.Parse("3 + (-1 * -4) / 2 - 0 % 17");
BaseExpression expr = BaseExpression.Parse("x + (y * z) / w - k % l");
var subst = new Dictionary <string, BaseExpression>();
subst["x"] = new IntegerExpression(3);
subst["y"] = new IntegerExpression(-1);
subst["z"] = new IntegerExpression(-4);
subst["w"] = new IntegerExpression(2);
subst["k"] = new IntegerExpression(0);
subst["l"] = new IntegerExpression(17);
BaseExpression exprSubst = expr.Subst(subst);
exprExpected.EvaluateBe().ExtractRawInteger(out var expected);
exprSubst.EvaluateBe().ExtractRawInteger(out var actual);
Assert.AreEqual(expected, actual);
}