1 /* Copyright 2015 Google Inc. All Rights Reserved. 2 3 Distributed under MIT license. 4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT 5 */ 6 namespace Org.Brotli.Dec 7 { 8 /// <summary> 9 /// Tests for 10 /// <see cref="Transform"/> 11 /// . 12 /// </summary> 13 public class TransformTest 14 { Crc64(byte[] data)15 private static long Crc64(byte[] data) 16 { 17 long crc = -1; 18 for (int i = 0; i < data.Length; ++i) 19 { 20 long c = (crc ^ (long)(data[i] & unchecked((int)(0xFF)))) & unchecked((int)(0xFF)); 21 for (int k = 0; k < 8; k++) 22 { 23 c = ((long)(((ulong)c) >> 1)) ^ (-(c & 1L) & -3932672073523589310L); 24 } 25 crc = c ^ ((long)(((ulong)crc) >> 8)); 26 } 27 return ~crc; 28 } 29 30 [NUnit.Framework.Test] TestTrimAll()31 public virtual void TestTrimAll() 32 { 33 byte[] output = new byte[2]; 34 byte[] input = new byte[] { 119, 111, 114, 100 }; 35 // "word" 36 Org.Brotli.Dec.Transform transform = new Org.Brotli.Dec.Transform("[", Org.Brotli.Dec.WordTransformType.OmitFirst5, "]"); 37 Org.Brotli.Dec.Transform.TransformDictionaryWord(output, 0, input, 0, input.Length, transform); 38 byte[] expectedOutput = new byte[] { 91, 93 }; 39 // "[]" 40 NUnit.Framework.Assert.AreEqual(expectedOutput, output); 41 } 42 43 [NUnit.Framework.Test] TestCapitalize()44 public virtual void TestCapitalize() 45 { 46 byte[] output = new byte[8]; 47 byte[] input = new byte[] { 113, unchecked((byte)(-61)), unchecked((byte)(-90)), unchecked((byte)(-32)), unchecked((byte)(-92)), unchecked((byte)(-86)) }; 48 // "qæप" 49 Org.Brotli.Dec.Transform transform = new Org.Brotli.Dec.Transform("[", Org.Brotli.Dec.WordTransformType.UppercaseAll, "]"); 50 Org.Brotli.Dec.Transform.TransformDictionaryWord(output, 0, input, 0, input.Length, transform); 51 byte[] expectedOutput = new byte[] { 91, 81, unchecked((byte)(-61)), unchecked((byte)(-122)), unchecked((byte)(-32)), unchecked((byte)(-92)), unchecked((byte)(-81)), 93 }; 52 // "[QÆय]" 53 NUnit.Framework.Assert.AreEqual(expectedOutput, output); 54 } 55 56 [NUnit.Framework.Test] TestAllTransforms()57 public virtual void TestAllTransforms() 58 { 59 /* This string allows to apply all transforms: head and tail cutting, capitalization and 60 turning to upper case; all results will be mutually different. */ 61 // "o123456789abcdef" 62 byte[] testWord = new byte[] { 111, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102 }; 63 byte[] output = new byte[2259]; 64 int offset = 0; 65 for (int i = 0; i < Org.Brotli.Dec.Transform.Transforms.Length; ++i) 66 { 67 offset += Org.Brotli.Dec.Transform.TransformDictionaryWord(output, offset, testWord, 0, testWord.Length, Org.Brotli.Dec.Transform.Transforms[i]); 68 output[offset++] = unchecked((byte)(-1)); 69 } 70 NUnit.Framework.Assert.AreEqual(output.Length, offset); 71 NUnit.Framework.Assert.AreEqual(8929191060211225186L, Crc64(output)); 72 } 73 } 74 } 75