public void IsClean_IsFalse_WhenDataIsWritten()
{
// Arrange
var stream = new BufferedStream();
byte[] data = new byte[1024];
stream.Write(data, 0, data.Length);
// Act
bool isClean = stream.IsClean;
// Assert
Assert.False(isClean);
}
public void Position_IsMovedByReservedBytesForSize()
{
// Arrange
var stream = new BufferedStream();
int length = (int)stream.Length;
byte[] data = new byte[1024];
// Act
stream.Write(data, 0, data.Length);
// Assert
Assert.Equal(stream.Length, length + data.Length);
}
public void Length_IsMovedAfterWriting()
{
// Arrange
var stream = new BufferedStream();
int position = (int)stream.Position;
byte[] data = new byte[1024];
// Act
stream.Write(data, 0, data.Length);
// Assert
Assert.Equal(stream.Position, position + data.Length);
}
public void Seek_Begin_ChangesPosition()
{
// Arrange
var stream = new BufferedStream();
long initPosition = stream.Position;
const int toMove = 2;
var data = new byte[1024];
// Act
stream.Write(data, 0, data.Length);
stream.Seek(toMove, SeekOrigin.Begin);
// Act and assert
Assert.Equal(stream.Position, initPosition + toMove);
}
public void Read_ReadsDataFromStream_WhenCountIsBigger()
{
// Arrange
var stream = new BufferedStream();
byte[] data = new byte[1024];
new Random().NextBytes(data);
// Act
stream.Write(data, 0, data.Length);
stream.Seek(0, SeekOrigin.Begin);
byte[] receivedBytes = new byte[data.Length + 1];
// Assert
Assert.Throws <EndOfStreamException>(() => stream.Read(receivedBytes, 0, receivedBytes.Length));
}
public void Seek_Current_ChangesPosition()
{
// Arrange
var stream = new BufferedStream();
var data = new byte[1024];
long toMove = -2;
// Act
stream.Write(data, 0, data.Length);
long position = stream.Position;
stream.Seek(toMove, SeekOrigin.Current);
// Act and assert
Assert.Equal(stream.Position, position + toMove);
}
public void Read_ReadsDataFromStream_WhenCountIsSmaller()
{
// Arrange
var stream = new BufferedStream();
byte[] data = new byte[1024];
new Random().NextBytes(data);
// Act
stream.Write(data, 0, data.Length);
stream.Seek(0, SeekOrigin.Begin);
byte[] receivedBytes = new byte[data.Length - 1];
stream.Read(receivedBytes, 0, receivedBytes.Length);
// Assert
Assert.Equal(data.Take(receivedBytes.Length), receivedBytes);
}
public void Clean_ResetsPositions()
{
// Arrange
var stream = new BufferedStream();
int length = (int)stream.Length;
int position = (int)stream.Position;
byte[] data = new byte[1024];
stream.Write(data, 0, data.Length);
// Act
stream.Clean();
// Assert
Assert.Equal(stream.Position, position);
Assert.Equal(stream.Length, length);
}