/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.tom_roush.fontbox.cmap;

import junit.framework.TestCase;

import java.io.IOException;

/**
 * This will test the CMapParser implementation.
 *
 */
public class TestCMapParser extends TestCase
{

    /**
     * Check whether the parser and the resulting mapping is working correct.
     *
     * @throws IOException If something went wrong
     */
    public void testLookup() throws IOException
    {
        CMapParser parser = new CMapParser();
        CMap cMap = parser.parse( getClass().getResourceAsStream("/fontbox/cmap/CMapTest") );

        // char mappings
        byte[] bytes1 = {0, 1};
        assertEquals("bytes 00 01 from bfrange <0001> <0009> <0041>", "A", cMap.toUnicode(toInt(bytes1)));

        byte[] bytes2 = {1, 00};
        String str2 = "0";
        assertEquals("bytes 01 00 from bfrange <0100> <0109> <0030>", str2, cMap.toUnicode(toInt(bytes2)));

        byte[] bytes3 = {0, 10};
        String str3 = "*";
        assertEquals("bytes 00 0A from bfchar <000A> <002A>", str3, cMap.toUnicode(toInt(bytes3)));

        byte[] bytes4 = {1, 10};
        String str4 = "+";
        assertEquals("bytes 01 0A from bfchar <010A> <002B>", str4, cMap.toUnicode(toInt(bytes4)));

        // CID mappings
        int cid1 = 65;
        assertEquals("CID 65 from cidrange <0000> <00ff> 0 ", 65, cMap.toCID(cid1));

        int cid2 = 280;
        int strCID2 = 0x0118;
        assertEquals("CID 280 from cidrange <0100> <01ff> 256", strCID2, cMap.toCID(cid2));

        int cid3 = 520;
        int strCID3 = 0x0208;
        assertEquals("CID 520 from cidchar <0208> 520", strCID3, cMap.toCID(cid3));
    }

    private int toInt(byte[] data)
    {
        int code = 0;
        for (byte b : data)
        {
            code <<= 8;
            code |= (b + 256) % 256;
        }
        return code;
    }

    /**
     * Tets the parser against a valid, but poorly formated CMap file.
     * @throws IOException If something went wrong
     */
    public void testParserWithPoorWhitespace() throws IOException
    {
        CMapParser parser = new CMapParser();
        CMap cMap = parser.parse( getClass().getResourceAsStream("/fontbox/cmap/CMapNoWhitespace") );

        assertNotNull("Failed to parse nasty CMap file", cMap);
    }
}