public void CRC32Test()
{
LogStart("CRC32Test");
Action <uint, uint> testReverse = (uint original, uint expected) => { Assert.IsTrue(HashServices.ReverseBits(original) == expected); };
Action <string, uint> testCRC32 = (string data, uint expected) =>
{
byte[] crc = HashServices.CRC32(Encoding.ASCII.GetBytes(data));
uint crcValue = BitConverter.ToUInt32(crc, 0);
Assert.IsTrue(crcValue == expected);
};
testReverse(0x1, 0x80000000u);
testReverse(0x2, 0x40000000u);
testReverse(0x4, 0x20000000u);
testReverse(0x8, 0x10000000u);
testReverse(0xd2d15a39u, 0x9c5a8b4bu);
Assert.IsFalse(HashServices.ReverseBits(0xd2d15a39u) == 0x9c5b8b4bu);
testCRC32("123456789", 0xcbf43926u);
testCRC32("A", 0xd3d99e8bu);
testCRC32("0", 0xf4dbdf21u);
testCRC32("This is just a test string that should be long enough and weird enough to catch ERRORS!", 0x6684ac42u);
DateTime start;
uint result;
//And now the big one: will a huge file still produce the right crc32 using the stream method?
using (FileStream f = new FileStream("MediaCreationTool.exe", FileMode.Open))
{
start = DateTime.Now;
result = BitConverter.ToUInt32(HashServices.CRC32(f), 0);
Logger.Info($"CRC32 of 17.7mb file took {(DateTime.Now - start).ToSimplePhrase()}");
Assert.IsTrue(result == 0x5a2DD3B4);
}
//Oh and might as well test time for normal... crc
//start = DateTime.Now;
//result = BitConverter.ToUInt32(NetworkServices.CRC32(File.ReadAllBytes("MediaCreationTool.exe")), 0);
//Logger.Info($"CRC32 of 17.7mb file took {(DateTime.Now - start).ToSimplePhrase()}");
//Assert.IsTrue(result == 0x5a2DD3B4);
}
