package org.alfresco.repo.virtual.ref;

import junit.framework.TestCase;

import org.alfresco.util.Pair;
import org.apache.commons.codec.binary.Base64;
import org.junit.Test;

public class NumericPathHasherTest extends TestCase
{
    @Test
    public void testHash() throws Exception
    {
        NumericPathHasher nph = new NumericPathHasher();

        Pair<String, String> h1 = nph.hash("/1/2/3");
        assertEquals(new Pair<String, String>("123",
                                              null),
                     h1);

        Pair<String, String> h2 = nph.hash("/a/2/3");
        String xc2 = new String(Base64.encodeBase64("/a/2/3".getBytes(),
                                                    false));
        assertEquals(new Pair<String, String>(null,
                                              xc2),
                     h2);

        Pair<String, String> h3 = nph.hash("/1/2/a/1/3");
        String xc3 = new String(Base64.encodeBase64("a/1/3".getBytes(),
                                                    false));
        assertEquals(new Pair<String, String>("12",
                                              xc3),
                     h3);

    }

    @Test
    public void testHashRoot() throws Exception
    {
        NumericPathHasher nph = new NumericPathHasher();

        Pair<String, String> h1 = nph.hash("/");
        assertEquals(new Pair<String, String>(null,
                                              ""),
                     h1);
    }

    @Test
    public void testLookupRoot() throws Exception
    {
        NumericPathHasher nph = new NumericPathHasher();

        String p = nph.lookup(new Pair<String, String>(null,
                                                       ""));
        assertEquals("/",
                     p);
    }

    @Test
    public void testLookup() throws Exception
    {
        NumericPathHasher nph = new NumericPathHasher();
        Pair<String, String> h = nph.hash("/1/2/3");

        assertEquals(new Pair<String, String>("123",
                                              null),
                     h);

        String xc2 = new String(Base64.encodeBase64("/a/2/3".getBytes(),
                                                    false));
        String p2 = nph.lookup(new Pair<String, String>(null,
                                                        xc2));
        assertEquals("/a/2/3",
                     p2);

        String xc3 = new String(Base64.encodeBase64("a/1/3".getBytes(),
                                                    false));
        String p3 = nph.lookup(new Pair<String, String>("12",
                                                        xc3));
        assertEquals("/1/2/a/1/3",
                     p3);
    }

    @Test
    public void testHashEmpty() throws Exception
    {
        NumericPathHasher nph = new NumericPathHasher();

        try
        {
            nph.hash("");
            fail("Should not be able to hash empty String");
        }
        catch (IllegalArgumentException e)
        {
            // as expected
        }
    }
}