package org.apidesign.test.visitor;

import org.apidesign.test.visitor.PrintTest.PrintVisitor;

import static junit.framework.Assert.*;

import org.apidesign.visitor.Language.Expression;

import org.apidesign.visitor.Language.Minus;

import org.apidesign.visitor.Language.Number;

import org.junit.Test;

public class PrintOfMinusStructureTest {

    @Test public void printOneMinusTwo() {

        if (Boolean.getBoolean("no.failures")) return;

        Number one = new Number(1);

        Number two = new Number(2);

        Expression minus = new Minus(one, two);

        PrintVisitor print = new PrintVisitor();

        minus.visit(print); // fails with IllegalStateException

        assertEquals("1 - 2", print.sb.toString());

    }

}