package org.nutz.el;
import static org.junit.Assert.*;
import java.io.IOException;
import org.junit.Before;
import org.junit.Test;
import org.nutz.el.arithmetic.ShuntingYard;
public class RPNTest {
private ShuntingYard sy = null;
@Before
public void setup(){
sy = new ShuntingYard();
}
private String parseRPN(String val){
StringBuilder sb = new StringBuilder();
for(Object obj : sy.parseToRPN(val)){
sb.append(obj);
}
return sb.toString();
}
@Test
public void simpleRPN() throws IOException{
assertEquals("11+1+", parseRPN("1+1+1"));
assertEquals("11-", parseRPN("1-1"));
assertEquals("11-1-", parseRPN("1-1-1"));
assertEquals("52%1+",parseRPN("5%2+1"));
assertEquals("152%+",parseRPN("1+5%2"));
}
@Test
public void mulRPn() throws IOException{
assertEquals("512+4*+3-", parseRPN("5+((1+2)*4)-3"));
assertEquals("987*+65+412*-3+-*+", parseRPN("9+8*7+(6+5)*(-(4-1*2+3))"));
}
}