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Fix Seek Operations in SftpFileStream #910

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merged 7 commits into from
Nov 29, 2022
Merged

Fix Seek Operations in SftpFileStream #910

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bdcf48b
Update .gitignore
lemonyte Jan 5, 2022
a6b5e6e
Fix offset operations in SftpFileStream.Seek
lemonyte Jan 5, 2022
161c87e
Fix seek exception message and add default case for invalid seek origin
lemonyte Feb 16, 2022
731571c
Revert .gitignore changes
lemonyte Nov 18, 2022
fcf3c56
Use named params when throwing ArgumentException
lemonyte Nov 18, 2022
0cf229a
Add tests for seeking from end of file
lemonyte Nov 18, 2022
8d7e004
Fix seek tests
lemonyte Nov 18, 2022
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102 changes: 102 additions & 0 deletions .../Sftp/SftpFileStreamTest_Seek_PositionedAtBeginningOfStream_OriginEndAndOffsetNegative.cs
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using System;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Moq;
using Renci.SshNet.Sftp;

namespace Renci.SshNet.Tests.Classes.Sftp
{
[TestClass]
public class SftpFileStreamTest_Seek_PositionedAtBeginningOfStream_OriginEndAndOffsetNegative : SftpFileStreamTestBase
{
private Random _random;
private string _path;
private FileMode _fileMode;
private FileAccess _fileAccess;
private int _bufferSize;
private uint _readBufferSize;
private uint _writeBufferSize;
private byte[] _handle;
private SftpFileStream _target;
private int _offset;
private SftpFileAttributes _attributes;
private EndOfStreamException _actualException;

protected override void SetupData()
{
base.SetupData();

_random = new Random();
_path = _random.Next().ToString();
_fileMode = FileMode.OpenOrCreate;
_fileAccess = FileAccess.Read;
_bufferSize = _random.Next(5, 1000);
_readBufferSize = (uint)_random.Next(5, 1000);
_writeBufferSize = (uint)_random.Next(5, 1000);
_handle = GenerateRandom(_random.Next(1, 10), _random);
_offset = _random.Next(int.MinValue, -1);
_attributes = SftpFileAttributes.Empty;
}

protected override void SetupMocks()
{
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestOpen(_path, Flags.Read | Flags.CreateNewOrOpen, false))
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.Returns(_handle);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalReadLength((uint)_bufferSize))
.Returns(_readBufferSize);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalWriteLength((uint)_bufferSize, _handle))
.Returns(_writeBufferSize);
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestFStat(_handle, false))
.Returns(_attributes);
}

protected override void Arrange()
{
base.Arrange();

_target = new SftpFileStream(SftpSessionMock.Object, _path, _fileMode, _fileAccess, _bufferSize);
}

protected override void Act()
{
try
{
_target.Seek(_offset, SeekOrigin.End);
Assert.Fail();
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}
catch (EndOfStreamException ex)
{
_actualException = ex;
}
}

[TestMethod]
public void SeekShouldHaveThrownEndOfStreamException()
{
Assert.IsNotNull(_actualException);
Assert.IsNull(_actualException.InnerException);
Assert.AreEqual("Attempted to read past the end of the stream.", _actualException.Message);
}

[TestMethod]
public void IsOpenOnSftpSessionShouldHaveBeenInvokedOnce()
{
SftpSessionMock.Verify(p => p.IsOpen, Times.Once);
}

[TestMethod]
public void PositionShouldReturnZero()
{
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);

Assert.AreEqual(0L, _target.Position);

SftpSessionMock.Verify(p => p.IsOpen, Times.Exactly(2));
}
}
}
92 changes: 92 additions & 0 deletions .../Sftp/SftpFileStreamTest_Seek_PositionedAtBeginningOfStream_OriginEndAndOffsetPositive.cs
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using System;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Moq;
using Renci.SshNet.Sftp;

namespace Renci.SshNet.Tests.Classes.Sftp
{
[TestClass]
public class SftpFileStreamTest_Seek_PositionedAtBeginningOfStream_OriginEndAndOffsetPositive : SftpFileStreamTestBase
{
private Random _random;
private string _path;
private FileMode _fileMode;
private FileAccess _fileAccess;
private int _bufferSize;
private uint _readBufferSize;
private uint _writeBufferSize;
private byte[] _handle;
private SftpFileStream _target;
private int _offset;
private SftpFileAttributes _attributes;
private long _actual;

protected override void SetupData()
{
base.SetupData();

_random = new Random();
_path = _random.Next().ToString();
_fileMode = FileMode.OpenOrCreate;
_fileAccess = FileAccess.Read;
_bufferSize = _random.Next(5, 1000);
_readBufferSize = (uint)_random.Next(5, 1000);
_writeBufferSize = (uint)_random.Next(5, 1000);
_handle = GenerateRandom(_random.Next(1, 10), _random);
_offset = _random.Next(1, int.MaxValue);
_attributes = SftpFileAttributes.Empty;
}

protected override void SetupMocks()
{
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestOpen(_path, Flags.Read | Flags.CreateNewOrOpen, false))
.Returns(_handle);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalReadLength((uint)_bufferSize))
.Returns(_readBufferSize);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalWriteLength((uint)_bufferSize, _handle))
.Returns(_writeBufferSize);
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestFStat(_handle, false))
.Returns(_attributes);
}

protected override void Arrange()
{
base.Arrange();

_target = new SftpFileStream(SftpSessionMock.Object, _path, _fileMode, _fileAccess, _bufferSize);
}

protected override void Act()
{
_actual = _target.Seek(_offset, SeekOrigin.End);
}

[TestMethod]
public void SeekShouldHaveReturnedOffset()
{
Assert.AreEqual(_offset, _actual);
}

[TestMethod]
public void IsOpenOnSftpSessionShouldHaveBeenInvokedOnce()
{
SftpSessionMock.Verify(p => p.IsOpen, Times.Once);
}

[TestMethod]
public void PositionShouldReturnOffset()
{
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);

Assert.AreEqual(_offset, _target.Position);

SftpSessionMock.Verify(p => p.IsOpen, Times.Exactly(2));
}
}
}
90 changes: 90 additions & 0 deletions ...sses/Sftp/SftpFileStreamTest_Seek_PositionedAtBeginningOfStream_OriginEndAndOffsetZero.cs
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using System;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Moq;
using Renci.SshNet.Sftp;

namespace Renci.SshNet.Tests.Classes.Sftp
{
[TestClass]
public class SftpFileStreamTest_Seek_PositionedAtBeginningOfStream_OriginEndAndOffsetZero : SftpFileStreamTestBase
{
private Random _random;
private string _path;
private FileMode _fileMode;
private FileAccess _fileAccess;
private int _bufferSize;
private uint _readBufferSize;
private uint _writeBufferSize;
private byte[] _handle;
private SftpFileStream _target;
private SftpFileAttributes _attributes;
private long _actual;

protected override void SetupData()
{
base.SetupData();

_random = new Random();
_path = _random.Next().ToString();
_fileMode = FileMode.OpenOrCreate;
_fileAccess = FileAccess.Read;
_bufferSize = _random.Next(5, 1000);
_readBufferSize = (uint)_random.Next(5, 1000);
_writeBufferSize = (uint)_random.Next(5, 1000);
_handle = GenerateRandom(_random.Next(1, 10), _random);
_attributes = SftpFileAttributes.Empty;
}

protected override void SetupMocks()
{
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestOpen(_path, Flags.Read | Flags.CreateNewOrOpen, false))
.Returns(_handle);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalReadLength((uint)_bufferSize))
.Returns(_readBufferSize);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalWriteLength((uint)_bufferSize, _handle))
.Returns(_writeBufferSize);
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestFStat(_handle, false))
.Returns(_attributes);
}

protected override void Arrange()
{
base.Arrange();

_target = new SftpFileStream(SftpSessionMock.Object, _path, _fileMode, _fileAccess, _bufferSize);
}

protected override void Act()
{
_actual = _target.Seek(0L, SeekOrigin.End);
}

[TestMethod]
public void SeekShouldHaveReturnedZero()
{
Assert.AreEqual(0L, _actual);
}

[TestMethod]
public void IsOpenOnSftpSessionShouldHaveBeenInvokedOnce()
{
SftpSessionMock.Verify(p => p.IsOpen, Times.Once);
}

[TestMethod]
public void PositionShouldReturnZero()
{
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);

Assert.AreEqual(0L, _target.Position);

SftpSessionMock.Verify(p => p.IsOpen, Times.Exactly(2));
}
}
}