public void AllPhasesWork()
{
// Arrange
var sourceStream = new MemoryStream(Encoding.UTF8.GetBytes("First line\nSecond line\nThird line"));
var twiceStream = new ReadTwiceStream(sourceStream);
var buffer = new byte[1000];
// Phase 1
var read = twiceStream.Read(buffer, 0, 10);
Assert.AreEqual(10, read);
var firstLine = Encoding.UTF8.GetString(buffer, 0, 10);
Assert.AreEqual("First line", firstLine);
// Phase 2
twiceStream.Seek(0, SeekOrigin.Begin);
read = twiceStream.Read(buffer, 0, 10);
Assert.AreEqual(10, read);
firstLine = Encoding.UTF8.GetString(buffer, 0, 10);
Assert.AreEqual("First line", firstLine);
// Phase 3
string theRest;
using (var memoryStream = new MemoryStream())
{
twiceStream.CopyTo(memoryStream);
theRest = Encoding.UTF8.GetString(memoryStream.GetBuffer(), 0, (int)memoryStream.Position);
}
Assert.AreEqual("\nSecond line\nThird line", theRest);
}
public void Binary_works()
{
var r = new Random();
var buffer = new byte[1024];
r.NextBytes(buffer);
var sourceStream = new MemoryStream(buffer);
var twiceStream = new ReadTwiceStream(sourceStream);
var readBuffer = new byte[256];
twiceStream.Read(readBuffer, 0, 256);
Assert.IsTrue(readBuffer.EqualData(buffer, 0, 256));
}