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