public void Crc32_OfNullFile_ThrowsArgumentNullException()
{
// We use a privately defined type for the storage access to check initialize and remove, which will
// hopefully guarantee that we use the expected storage during this test.
var storageAcces = new Crc32TestStorageAccess();
StreamUtilities.Initialize(storageAcces);
var ignoreRanges = new[] { new Range <int>(10, 200) };
Assert.Throws <System.ArgumentNullException>(() => Crc32.OfFile(null));
Assert.Throws <System.ArgumentNullException>(() => Crc32.OfFile(null, ignoreRanges));
Assert.Throws <System.ArgumentNullException>(() => Crc32.OfFile(null, replaceFirstByte: true, alternateFirstByte: 0x42));
}
public void Crc32_OfFileWithAlternateFirstByte_IsCorrect()
{
// We use a privately defined type for the storage access to check initialize and remove, which will
// hopefully guarantee that we use the expected storage during this test.
var storageAcces = new Crc32TestStorageAccess();
var testFileName = "~/Crc32_OfFileWithAlternateFirstByte_IsCorrect.dat";
StreamUtilities.Initialize(storageAcces);
using (var fileStream = StreamUtilities.OpenFileStream(testFileName))
{
var testData = new byte[] { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
fileStream.Write(testData, 0, testData.Length);
var crc32 = Crc32.OfFile(testFileName, replaceFirstByte: true, alternateFirstByte: 0x42);
Assert.Equal(0x066F5C62u, crc32);
}
}
public void Crc32_OfFileWithIgnoreRange_IsCorrect()
{
// We use a privately defined type for the storage access to check initialize and remove, which will
// hopefully guarantee that we use the expected storage during this test.
var storageAcces = new Crc32TestStorageAccess();
StreamUtilities.Initialize(storageAcces);
var testFileName = "~/Crc32_OfFileWithIgnoreRange_IsCorrect.dat";
using (var fileStream = StreamUtilities.OpenFileStream(testFileName))
{
var testData = new byte[] { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
fileStream.Write(testData, 0, testData.Length);
var ignoreRanges = new[] { new Range <int>(1, 2) };
var crc32 = Crc32.OfFile(testFileName, ignoreRanges);
Assert.Equal(0xB4DA8CCAu, crc32);
}
}
