package edu.uci.ics.asterix.lexergenerator;

import static edu.uci.ics.asterix.lexergenerator.Fixtures.*;
import static org.junit.Assert.*;

import org.junit.Test;

import edu.uci.ics.asterix.lexergenerator.LexerNode;

public class LexerNodeMergeNodeTest {

    @Test
    public void MergeIsAdd() throws Exception {
        LexerNode node = new LexerNode();
        node.append(rule);
        LexerNode node2 = new LexerNode();
        node2.append(rule2);
        node2.append(rule);
        node2.merge(node);
        node2.appendTokenName(token_name);
        
        LexerNode expected = new LexerNode();
        expected.append(rule2);
        expected.append(rule);
        expected.add(rule);
        expected.appendTokenName(token_name);
        
        assertEquals(expected.toString(), node2.toString());
        assertEquals(expected.toJava(), node2.toJava());
    }

    @Test
    public void MergeTwoToken() throws Exception {
        LexerNode node = new LexerNode();
        node.append(rule);
        node.appendTokenName(token_name);
        LexerNode node2 = new LexerNode();
        node2.append(rule2);
        node2.appendTokenName(token2_name);
        node.merge(node2);

        assertEquals(" ( "+rule_name+token_tostring+" || "+rule2_name+token_tostring+" ) ", node.toString());
        assertEquals(rule_match + "{"
        		+ "\n" + rule_action
        		+ "\n" + token_return
        +"}"+rule2_match+"{" 
        + "\n" + rule2_action
        + "\n" + token2_return
        +"}return parseError(TOKEN_MYTOKEN,TOKEN_MYTOKEN2);\n"
, node.toJava());
    }

    @Test(expected=Exception.class)
    public void MergeConflict() throws Exception {
        LexerNode node = new LexerNode();
        node.append(rule);
        node.appendTokenName(token_name);
        LexerNode node2 = new LexerNode();
        node2.append(rule);
        node2.appendTokenName(token2_name);
        try {
            node.merge(node2);
        } catch (Exception e) {
            assertEquals("Rule conflict between: "+token_name +" and "+token2_name, e.getMessage());
            throw e;
        }
    }

    @Test
    public void MergeWithoutConflictWithRemoveTokensName() throws Exception {
        LexerNode node = new LexerNode();
        node.append(rule);
        node.append(rule);
        node.appendTokenName(token_name);
        LexerNode node2 = new LexerNode();
        node2.append(rule);
        node2.append(rule);
        node2.appendTokenName(token2_name);
        node2.removeTokensName();
        node.merge(node2);
        assertEquals(rule_name+rule_name+token_tostring, node.toString());
    }
}