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/* Copyright 2015 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
namespace Org.Brotli.Dec
{
/// <summary>
/// Tests for
/// <see cref="Transform"/>
/// .
/// </summary>
public class TransformTest
{
private static long Crc64(byte[] data)
{
long crc = -1;
for (int i = 0; i < data.Length; ++i)
{
long c = (crc ^ (long)(data[i] & unchecked((int)(0xFF)))) & unchecked((int)(0xFF));
for (int k = 0; k < 8; k++)
{
c = ((long)(((ulong)c) >> 1)) ^ (-(c & 1L) & -3932672073523589310L);
}
crc = c ^ ((long)(((ulong)crc) >> 8));
}
return ~crc;
}
[NUnit.Framework.Test]
public virtual void TestTrimAll()
{
byte[] output = new byte[2];
byte[] input = new byte[] { 119, 111, 114, 100 };
// "word"
Org.Brotli.Dec.Transform transform = new Org.Brotli.Dec.Transform("[", Org.Brotli.Dec.WordTransformType.OmitFirst5, "]");
Org.Brotli.Dec.Transform.TransformDictionaryWord(output, 0, input, 0, input.Length, transform);
byte[] expectedOutput = new byte[] { 91, 93 };
// "[]"
NUnit.Framework.Assert.AreEqual(expectedOutput, output);
}
[NUnit.Framework.Test]
public virtual void TestCapitalize()
{
byte[] output = new byte[8];
byte[] input = new byte[] { 113, unchecked((byte)(-61)), unchecked((byte)(-90)), unchecked((byte)(-32)), unchecked((byte)(-92)), unchecked((byte)(-86)) };
// "qæप"
Org.Brotli.Dec.Transform transform = new Org.Brotli.Dec.Transform("[", Org.Brotli.Dec.WordTransformType.UppercaseAll, "]");
Org.Brotli.Dec.Transform.TransformDictionaryWord(output, 0, input, 0, input.Length, transform);
byte[] expectedOutput = new byte[] { 91, 81, unchecked((byte)(-61)), unchecked((byte)(-122)), unchecked((byte)(-32)), unchecked((byte)(-92)), unchecked((byte)(-81)), 93 };
// "[QÆय]"
NUnit.Framework.Assert.AreEqual(expectedOutput, output);
}
[NUnit.Framework.Test]
public virtual void TestAllTransforms()
{
/* This string allows to apply all transforms: head and tail cutting, capitalization and
turning to upper case; all results will be mutually different. */
// "o123456789abcdef"
byte[] testWord = new byte[] { 111, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102 };
byte[] output = new byte[2259];
int offset = 0;
for (int i = 0; i < Org.Brotli.Dec.Transform.Transforms.Length; ++i)
{
offset += Org.Brotli.Dec.Transform.TransformDictionaryWord(output, offset, testWord, 0, testWord.Length, Org.Brotli.Dec.Transform.Transforms[i]);
output[offset++] = unchecked((byte)(-1));
}
NUnit.Framework.Assert.AreEqual(output.Length, offset);
NUnit.Framework.Assert.AreEqual(8929191060211225186L, Crc64(output));
}
}
}