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package com.salesforce.phoenix.util;

import static org.junit.Assert.*;

import org.apache.hadoop.hbase.util.Bytes;
import org.junit.Test;

import com.salesforce.phoenix.schema.PDataType;


public class ByteUtilTest {

    @Test
    public void testSplitBytes() {
        byte[] startRow = Bytes.toBytes("EA");
        byte[] stopRow = Bytes.toBytes("EZ");
        byte[][] splitPoints = Bytes.split(startRow, stopRow, 10);
        for (byte[] splitPoint : splitPoints) {
            assertTrue(Bytes.toStringBinary(splitPoint), Bytes.compareTo(startRow, splitPoint) <= 0);
            assertTrue(Bytes.toStringBinary(splitPoint), Bytes.compareTo(stopRow, splitPoint) >= 0);
        }
    }
    
    @Test
    public void testVIntToBytes() {
        for (int i = -10000; i <= 10000; i++) {
            byte[] vint = Bytes.vintToBytes(i);
            int vintSize = vint.length;
            byte[] vint2 = new byte[vint.length];
            assertEquals(vintSize, ByteUtil.vintToBytes(vint2, 0, i));
            assertTrue(Bytes.BYTES_COMPARATOR.compare(vint,vint2) == 0);
        }
    }
    
    @Test
    public void testNextKey() {
        byte[] key = new byte[] {1};
        assertEquals((byte)2, ByteUtil.nextKey(key)[0]); 
        key = new byte[] {1, (byte)255};
        byte[] nextKey = ByteUtil.nextKey(key);
        byte[] expectedKey = new byte[] {2,(byte)0};
        assertArrayEquals(expectedKey, nextKey); 
        key = ByteUtil.concat(Bytes.toBytes("00D300000000XHP"), PDataType.INTEGER.toBytes(Integer.MAX_VALUE));
        nextKey = ByteUtil.nextKey(key);
        expectedKey = ByteUtil.concat(Bytes.toBytes("00D300000000XHQ"), PDataType.INTEGER.toBytes(Integer.MIN_VALUE));
        assertArrayEquals(expectedKey, nextKey);
        
        key = new byte[] {(byte)255};
        assertNull(ByteUtil.nextKey(key));
    }
}