public void Seek_ThrowsEndOfStream_WhenValueIsToBig()
{
// Arrange
var stream = new BufferedStream();
// Act and assert
Assert.Throws <EndOfStreamException>(() => stream.Seek(int.MaxValue, SeekOrigin.Begin));
}
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);
}