public void Peek_Does_Not_Advance_The_Read_Pointer()
{
var writeOperations = 100;
var ms = new ConcurrentStream(new MemoryStream());
var sat = new Dictionary<Guid, short>();
sat.Add(Guid.NewGuid(), 24);
sat.Add(Guid.NewGuid(), 25);
sat.Add(Guid.NewGuid(), 26);
var stateResolver = new Mock<IStateResolver>();
stateResolver.SetupGet(s => s.AllocationTable).Returns(sat);
stateResolver.Setup(s => s.IsAllocated(It.IsAny<Guid>())).Returns<Guid>(g => sat.ContainsKey(g));
stateResolver.Setup(s => s.GetAllocatedId(It.IsAny<Guid>())).Returns<Guid>(g => sat[g]);
//write operations
var captureWriter = new CaptureWriter(ms, stateResolver.Object);
for (int i = 0; i < writeOperations; i++)
{
var timestamp = DateTime.UtcNow;
var randomData = new byte[1024];
new Random().NextBytes(randomData);
var randomSat = (short)new Random().Next(24, 27);
var captureState = new Mock<ICaptureState>();
captureState.Setup(c => c.Data).Returns(randomData);
captureState.Setup(c => c.Guid).Returns(sat.Where(f => f.Value == randomSat).First().Key);
captureState.Setup(c => c.Timestamp).Returns(timestamp);
captureWriter.Write(captureState.Object);
}
//rewind the stream to the beginning
ms.Position = 0;
//read operations
var readStateResolver = new StateResolver();
readStateResolver.Add(new SimpleStateController { Guid = sat.Where(f => f.Value == 24).First().Key });
readStateResolver.Add(new SimpleStateController { Guid = sat.Where(f => f.Value == 25).First().Key });
readStateResolver.Add(new SimpleStateController { Guid = sat.Where(f => f.Value == 26).First().Key });
var captureReader = new CaptureReader(ms, readStateResolver);
var position = captureReader.Position;
var state = captureReader.Peek(sat.Where(f => f.Value == (short)26).First().Key);
Assert.NotNull(state);
Assert.Equal(position, captureReader.Position);
}
