public async Task PartialStream_WithOffsetAndLength_Seek_WorksCorrectly()
{
// Arrange
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var originalStream = new MemoryStream();
await originalStream.FillWithRandomBytesAsync(1024);
const int offset = 10;
const int length = 100;
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var partialStream = new PartialStream(originalStream, offset, length);
// Act
const int additionalOffset = 40;
partialStream.Seek(additionalOffset, SeekOrigin.Begin);
// Assert
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var outputStream = new MemoryStream();
await partialStream.CopyToAsync(outputStream);
var originalPortion = originalStream
.ToArray()
.Skip(offset + additionalOffset)
.Take(length - additionalOffset)
.ToArray();
outputStream.ToArray().Should().Equal(originalPortion);
}
public async Task PartialStream_WithOffset_ReadToEnd_ReturnsOnlyDataInRange()
{
// Arrange
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var originalStream = new MemoryStream();
await originalStream.FillWithRandomBytesAsync(1024);
const int offset = 10;
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var partialStream = new PartialStream(originalStream, offset, null);
// Act
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var outputStream = new MemoryStream();
await partialStream.CopyToAsync(outputStream);
// Assert
var originalPortion = originalStream.ToArray().Skip(offset).ToArray();
outputStream.Length.Should().Be(originalStream.Length - offset);
outputStream.ToArray().Should().Equal(originalPortion);
}
public async Task PartialStream_WithOffsetAndLength_InnerPositionChanged_StillReadsCorrectly()
{
// Arrange
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var originalStream = new MemoryStream();
await originalStream.FillWithRandomBytesAsync(1024);
const int offset = 10;
const int length = 100;
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var partialStream = new PartialStream(originalStream, offset, length);
// Act
originalStream.Position = 1000;
// Assert
#if !NET461 && !NETCOREAPP2_1
await
#endif
using var outputStream = new MemoryStream();
await partialStream.CopyToAsync(outputStream);
var originalPortion = originalStream.ToArray().Skip(offset).Take(length).ToArray();
outputStream.ToArray().Should().Equal(originalPortion);
}
public async Task ExportAsync(Stream stream)
{
var ms = new MemoryStream();
// find version
// -> http://dageron.com/?page_id=5446&lang=en
var version = ((file.GraphicsFlags & 0xF0000000) >> 28) |
((file.SystemFlags & 0xF0000000) >> 24);
var writer = new DataWriter(ms);
writer.Write((uint)0x07435352);
writer.Write((uint)version);
writer.Write((uint)file.SystemFlags);
writer.Write((uint)file.GraphicsFlags);
ms.Position = 0;
await ms.CopyToAsync(stream);
var resourceStream = new PartialStream(
archiveWrapper.archive_.BaseStream,
delegate() // offset
{
return((file.FileOffset * RageArchiveWrapper7.BLOCK_SIZE) + 16);
},
delegate() // size
{
return(file.FileSize);
}
);
await resourceStream.CopyToAsync(stream);
}
public async Task PartialStream_WithOffsetAndLength_ReadToEnd_ReturnsOnlyDataInRange()
{
// Arrange
using var originalStream = new MemoryStream();
await originalStream.FillWithRandomBytesAsync(1024);
const int offset = 10;
const int length = 100;
using var partialStream = new PartialStream(originalStream, offset, length);
// Act
using var outputStream = new MemoryStream();
await partialStream.CopyToAsync(outputStream);
// Assert
var originalPortion = originalStream.ToArray().Skip(offset).Take(length).ToArray();
outputStream.Length.Should().Be(length);
outputStream.ToArray().Should().Equal(originalPortion);
}
