/*
 * 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 org.openjena.atlas.lib;


import org.junit.Test ;
import org.openjena.atlas.junit.BaseTest ;
import org.openjena.atlas.lib.Hex ;

public class TestHex extends BaseTest
{
    @Test public void hex_01()
    {
        byte[] b = new byte[16] ;
        test(0L, 0, b, 16) ;
    }
    
    @Test public void hex_02()
    {
        byte[] b = new byte[16] ;
        test(1L, 0, b, 16) ;
    }

    @Test public void hex_03()
    {
        byte[] b = new byte[16] ;
        test(Long.MAX_VALUE, 0, b, 16) ;
    }
    
    @Test public void hex_04()
    {
        byte[] b = new byte[16] ;
        test(Long.MIN_VALUE, 0, b, 16) ;
    }
    
    @Test public void hex_05()
    {
        byte[] b = new byte[16] ;
        // -1L
        test(0xFFFFFFFFFFFFFFFFL, 0, b, 16) ;
    }

    @Test public void hex_06()
    {
        byte[] b = new byte[16] ;
        test(-1L, 0, b, 16) ;
    }

    private static void test(long value, int idx, byte[] b, int width)
    {
        int x = Hex.formatUnsignedLongHex(b, idx, value, width) ;
        assertEquals(width, x) ;
        for ( int i = 0 ; i < width ; i++ )
        {
            int v = b[i] ;
            if ( v >= '0' && v <= '9' ) continue ;
            if ( v >= 'a' && v <= 'f' ) continue ;
            if ( v >= 'A' && v <= 'F' ) continue ;
            fail(String.format("Not a hex digit: %02X",b[i])) ;
        }
        
        long v = Hex.getLong(b, idx) ;
        assertEquals(value, v) ;
    }
}