import org.junit.Test;

import regex.Atom;

import regex.Parser;

import java.util.ArrayList;

import static org.junit.Assert.assertEquals;

public class ParseTest {

@Test

public void basicTest() {

String s1 = "(a|b)*c";

String s2 = "abc";

String s3 = "a|b|c";

ArrayList<Atom> list = Parser.insertExplicitConcatOperator(s1);

ArrayList<Atom> postfix = Parser.toPostfix(list);

assertEquals(list.size(), 8);

assertEquals(postfix.toString(), "[a, b, |, *, c, &]");

list = Parser.insertExplicitConcatOperator(s2);

postfix = Parser.toPostfix(list);

assertEquals(list.size(), 5);

assertEquals(postfix.toString(), "[a, b, &, c, &]");

list = Parser.insertExplicitConcatOperator(s3);

postfix = Parser.toPostfix(list);

assertEquals(list.size(), 5);

assertEquals(postfix.toString(), "[a, b, |, c, |]");

}

@Test

public void complexTest() {

String s1 = "\\d{1,5}|.c";

String s2 = "ac\\D?d";

String s3 = ".+(cc|a)";

ArrayList<Atom> postfix = Parser.toPostfix(Parser.insertExplicitConcatOperator(s1));

assertEquals(postfix.toString(), "[\\d, {1,5}, ., c, &, |]");

postfix = Parser.toPostfix(Parser.insertExplicitConcatOperator(s2));

assertEquals(postfix.toString(), "[a, c, &, \\D, ?, &, d, &]");

postfix = Parser.toPostfix(Parser.insertExplicitConcatOperator(s3));

assertEquals(postfix.toString(), "[., +, c, c, &, a, |, &]");

}

}