//

// © Copyright Henrik Ravn 2004

//

// Use, modification and distribution are subject to the Boost Software License, Version 1.0. 

// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

//

using System;

using System.Collections;

using System.IO;

// uncomment the define below to include unit tests

//#define nunit

#if nunit

using NUnit.Framework;

// Unit tests for the DotZLib class library

// ----------------------------------------

//

// Use this with NUnit 2 from http://www.nunit.org

//

namespace DotZLibTests

{

    using DotZLib;

    // helper methods

    internal class Utils

    {

        public static bool byteArrEqual( byte[] lhs, byte[] rhs )

        {

            if (lhs.Length != rhs.Length)

                return false;

            for (int i = lhs.Length-1; i >= 0; --i)

                if (lhs[i] != rhs[i])

                    return false;

            return true;

        }

    }

    [TestFixture]

    public class CircBufferTests

    {

        #region Circular buffer tests

        [Test]

        public void SinglePutGet()

        {

            CircularBuffer buf = new CircularBuffer(10);

            Assert.AreEqual( 0, buf.Size );

            Assert.AreEqual( -1, buf.Get() );

            Assert.IsTrue(buf.Put( 1 ));

            Assert.AreEqual( 1, buf.Size );

            Assert.AreEqual( 1, buf.Get() );

            Assert.AreEqual( 0, buf.Size );

            Assert.AreEqual( -1, buf.Get() );

        }

        [Test]

        public void BlockPutGet()

        {

            CircularBuffer buf = new CircularBuffer(10);

            byte[] arr = {1,2,3,4,5,6,7,8,9,10};

            Assert.AreEqual( 10, buf.Put(arr,0,10) );

            Assert.AreEqual( 10, buf.Size );

            Assert.IsFalse( buf.Put(11) );

            Assert.AreEqual( 1, buf.Get() );

            Assert.IsTrue( buf.Put(11) );

            byte[] arr2 = (byte[])arr.Clone();

            Assert.AreEqual( 9, buf.Get(arr2,1,9) );

            Assert.IsTrue( Utils.byteArrEqual(arr,arr2) );

        }

        #endregion

    }

    [TestFixture]

    public class ChecksumTests

    {

        #region CRC32 Tests

        [Test]

        public void CRC32_Null()

        {

            CRC32Checksum crc32 = new CRC32Checksum();

            Assert.AreEqual( 0, crc32.Value );

            crc32 = new CRC32Checksum(1);

            Assert.AreEqual( 1, crc32.Value );

            crc32 = new CRC32Checksum(556);

            Assert.AreEqual( 556, crc32.Value );

        }

        [Test]

        public void CRC32_Data()

        {

            CRC32Checksum crc32 = new CRC32Checksum();

            byte[] data = { 1,2,3,4,5,6,7 };

            crc32.Update(data);

            Assert.AreEqual( 0x70e46888, crc32.Value  );

            crc32 = new CRC32Checksum();

            crc32.Update("penguin");

            Assert.AreEqual( 0x0e5c1a120, crc32.Value );

            crc32 = new CRC32Checksum(1);

            crc32.Update("penguin");

            Assert.AreEqual(0x43b6aa94, crc32.Value);

        }

        #endregion

        #region Adler tests

        [Test]

        public void Adler_Null()

        {

            AdlerChecksum adler = new AdlerChecksum();

            Assert.AreEqual(0, adler.Value);

            adler = new AdlerChecksum(1);

            Assert.AreEqual( 1, adler.Value );

            adler = new AdlerChecksum(556);

            Assert.AreEqual( 556, adler.Value );

        }

        [Test]

        public void Adler_Data()

        {

            AdlerChecksum adler = new AdlerChecksum(1);

            byte[] data = { 1,2,3,4,5,6,7 };

            adler.Update(data);

            Assert.AreEqual( 0x5b001d, adler.Value  );

            adler = new AdlerChecksum();

            adler.Update("penguin");

            Assert.AreEqual(0x0bcf02f6, adler.Value );

            adler = new AdlerChecksum(1);

            adler.Update("penguin");

            Assert.AreEqual(0x0bd602f7, adler.Value);

        }

        #endregion

    }

    [TestFixture]

    public class InfoTests

    {

        #region Info tests

        [Test]

        public void Info_Version()

        {

            Info info = new Info();

            Assert.AreEqual("1.2.3", Info.Version);

            Assert.AreEqual(32, info.SizeOfUInt);

            Assert.AreEqual(32, info.SizeOfULong);

            Assert.AreEqual(32, info.SizeOfPointer);

            Assert.AreEqual(32, info.SizeOfOffset);

        }

        #endregion

    }

    [TestFixture]

    public class DeflateInflateTests

    {

        #region Deflate tests

        [Test]

        public void Deflate_Init()

        {

            using (Deflater def = new Deflater(CompressLevel.Default))

            {

            }

        }

        private ArrayList compressedData = new ArrayList();

        private uint adler1;

        private ArrayList uncompressedData = new ArrayList();

        private uint adler2;

        public void CDataAvail(byte[] data, int startIndex, int count)

        {

            for (int i = 0; i < count; ++i)

                compressedData.Add(data[i+startIndex]);

        }

        [Test]

        public void Deflate_Compress()

        {

            compressedData.Clear();

            byte[] testData = new byte[35000];

            for (int i = 0; i < testData.Length; ++i)

                testData[i] = 5;

            using (Deflater def = new Deflater((CompressLevel)5))

            {

                def.DataAvailable += new DataAvailableHandler(CDataAvail);

                def.Add(testData);

                def.Finish();

                adler1 = def.Checksum;

            }

        }

        #endregion

        #region Inflate tests

        [Test]

        public void Inflate_Init()

        {

            using (Inflater inf = new Inflater())

            {

            }

        }

        private void DDataAvail(byte[] data, int startIndex, int count)

        {

            for (int i = 0; i < count; ++i)

                uncompressedData.Add(data[i+startIndex]);

        }

        [Test]

        public void Inflate_Expand()

        { 

            uncompressedData.Clear();

            using (Inflater inf = new Inflater())

            {

                inf.DataAvailable += new DataAvailableHandler(DDataAvail);

                inf.Add((byte[])compressedData.ToArray(typeof(byte)));

                inf.Finish();

                adler2 = inf.Checksum;

            }

            Assert.AreEqual( adler1, adler2 );

        }

        #endregion

    }

    [TestFixture]

    public class GZipStreamTests

    {

        #region GZipStream test

        [Test]

        public void GZipStream_WriteRead()

        {

            using (GZipStream gzOut = new GZipStream("gzstream.gz", CompressLevel.Best))

            {

                BinaryWriter writer = new BinaryWriter(gzOut);

                writer.Write("hi there");

                writer.Write(Math.PI);

                writer.Write(42);

            }

            using (GZipStream gzIn = new GZipStream("gzstream.gz"))

            {

                BinaryReader reader = new BinaryReader(gzIn);

                string s = reader.ReadString();

                Assert.AreEqual("hi there",s);

                double d = reader.ReadDouble();

                Assert.AreEqual(Math.PI, d);

                int i = reader.ReadInt32();

                Assert.AreEqual(42,i);

            }

        }

        #endregion

	}

}

#endif