public void CaptureReader_Correctly_Assigns_Offsets_To_ICaptureState_Instances_When_Read() { var stateController = new WeatherStateController(new WeatherSimulator()); var stateResolver = new StateResolver(); stateResolver.Add(stateController); var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); ms.Position = 0; var stream = new ConcurrentStream(ms); var captureStream = new CaptureStream(stream, FileAccess.Read, stateResolver); var lastOffset = 0d; for (int i = 0; i < captureStream.Count; i++) { var state = captureStream.Read(); Assert.True(state.Offset >= 0); Assert.True(state.Offset >= lastOffset); lastOffset = state.Offset; } }
public void CaptureService_Can_Write_A_Capture_To_Disk_When_Backed_By_A_FileStream() { var statesToWrite = 100; var simulator = new WeatherSimulator(); var controller = new WeatherStateController(simulator); var stateResolver = new StateResolver(); stateResolver.Add(controller); var tmpFile = System.IO.Path.GetTempFileName(); try { using (var ms = new FileStream(tmpFile,FileMode.Create)) { var baseStream = new ConcurrentStream(ms); var captureService = new CaptureService { Stream = baseStream, StateResolver = stateResolver }; captureService.Start(); controller.Initialise(captureService.CaptureStream); simulator.Start(); var count = 0; var resetEvent = new SlimResetEvent(20); simulator.NewTemperature += delegate { count++; if (count == statesToWrite) { simulator.Stop(); resetEvent.Set(); } }; resetEvent.Wait(); captureService.Flush(); } Assert.True(File.Exists(tmpFile)); Assert.True(new FileInfo(tmpFile).Length > 0); } finally { File.Delete(tmpFile); } }
public void PlaybackService_Supports_Multiple_ICaptureStream_Instances() { var resetEvent = new SlimResetEvent(20); var expectedStates = long.MaxValue; var executedStates = 0; var stateController = new WeatherStateController(new WeatherSimulator()); var stateResolver = new StateResolver(); stateResolver.Add(stateController); stateController.StateExecuted += delegate { executedStates++; if (executedStates == expectedStates) { resetEvent.Set(); } }; var playbackService = new PlaybackService(stateResolver); var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); var stream1 = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream1 = new CaptureStream(stream1, System.IO.FileAccess.Read, stateResolver); var stream2 = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream2 = new CaptureStream(stream2, System.IO.FileAccess.Read, stateResolver); expectedStates = captureStream1.Count + captureStream2.Count; playbackService.Add(captureStream1); playbackService.Add(captureStream2); playbackService.Start(); resetEvent.Wait(); }
public void When_A_Filter_Is_Applied_That_Returns_True_The_State_Is_Not_Scheduled_For_Playback() { var stateController = new WeatherStateController(new WeatherSimulator()); var stateResolver = new StateResolver(); stateResolver.Add(stateController); var scheduler = new Mock<IScheduler>(); var taskFactory = new Mock<ITaskFactory>(); var playbackService = new PlaybackService(stateResolver, scheduler.Object, taskFactory.Object); var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); var stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream = new CaptureStream(stream, System.IO.FileAccess.Read, stateResolver); playbackService.Add(captureStream); //add in a filter that will always return true to filter out the states playbackService.Add(new StreamFilter(f => true)); playbackService.Start(); //task factory should not have built any tasks taskFactory.Verify(t => t.Create(It.IsAny<ICaptureState>()), Times.Never()); scheduler.Verify(s => s.Add(It.IsAny<ITask>()), Times.Never()); }
public void When_A_Codec_Is_Not_Available_An_Event_Is_Raised_With_The_Guid_Of_The_Required_Codec() { var stateController = new WeatherStateController(new WeatherSimulator()); var stateResolver = new StateResolver(); stateResolver.Add(stateController); var playbackService = new PlaybackService(stateResolver); playbackService.CodecRequired += delegate(object sender, CodecRequiredEventArgs e) { Assert.Equal(stateController.Guid, e.Guid); }; var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); var stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream = new CaptureStream(stream, System.IO.FileAccess.Read, stateResolver); playbackService.Add(captureStream); }
public void When_A_Codec_Is_Not_Available_An_Event_Is_Raised_Giving_The_Caller_An_Opportunity_To_Acquire_It() { var stateController = new WeatherStateController(new WeatherSimulator()); var stateResolver = new StateResolver(); var eventRaised = false; var playbackService = new PlaybackService(stateResolver); playbackService.CodecRequired += delegate { eventRaised = true; }; var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); var stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream = new CaptureStream(stream, System.IO.FileAccess.Read, stateResolver); playbackService.Add(captureStream); Assert.True(eventRaised); }
public void CaptureWriter_Buids_A_Valid_Continuum_Header() { var baseStream = new ConcurrentStream(new MemoryStream()); var stateResolver = new StateResolver(); var stateController = new WeatherStateController(new WeatherSimulator()); stateResolver.Add(stateController); var captureWriter = new CaptureWriter(baseStream, stateResolver); baseStream.Position = 0; byte[] header = new byte[Constants.CONTINUUM_HEADER_SIGNATURE.Length]; baseStream.Read(header, 0, header.Length); for (int i = 0; i < Constants.CONTINUUM_HEADER_SIGNATURE.Length; i++) { Assert.Equal(Constants.CONTINUUM_HEADER_SIGNATURE[i], header[i]); } //dont worry about 4 bytes reserved for version info at the moment baseStream.Position = baseStream.Position + 4; //ignore the timestamp for now baseStream.Position = baseStream.Position + 8; //ignore the count property for now baseStream.Position = baseStream.Position + 8; //ignore the length property for now baseStream.Position = baseStream.Position + 8; //read the SAT, there should be at least one entry for it to be valid //the SAT looks like this: //<lengthOfSac><firstId of type short><delimiter> var lengthOfSatBuffer = new byte[4]; baseStream.Read(lengthOfSatBuffer, 0, lengthOfSatBuffer.Length); var lengthOfSat = BitConverter.ToInt32(lengthOfSatBuffer, 0); Assert.True(lengthOfSat > 0); //read back the sat var readSat = new Dictionary<short, Guid>(); for (int i = 0; i < lengthOfSat; i++) { var idBuffer = new byte[2]; baseStream.Read(idBuffer, 0, idBuffer.Length); var guid = new byte[16]; //guids are 16-bytes baseStream.Read(guid, 0, guid.Length); readSat.Add(BitConverter.ToInt16(idBuffer, 0), new Guid(guid)); } //match the sat foreach (var kvp in stateResolver.AllocationTable) { Assert.True(readSat.ContainsKey(kvp.Value)); Assert.True(readSat[kvp.Value] == kvp.Key); } }
public void Selecting_A_Position_When_The_Current_Position_Is_Zero_Will_Read_That_Node() { var controller = new WeatherStateController(new WeatherSimulator()); _StateResolver = new StateResolver(); _StateResolver.Add(controller); var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); var stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream = new CaptureStream(stream, System.IO.FileAccess.Read, _StateResolver); var desiredNode = Math.Round(Convert.ToDouble(captureStream.Count) / 2); captureStream.Position = (long)desiredNode - 1; //if the desired node is 50, its required to put the stream at position 49 in order to read it var seekNode = captureStream.Read(); //manually read nodes, when the desired node is reached it should match the node pulled out previously stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); captureStream = new CaptureStream(stream, FileAccess.Read, _StateResolver); ICaptureState actualNode = null; for (int i = 0; i < desiredNode; i++) { actualNode = captureStream.Read(); } Assert.Equal(actualNode.Guid, seekNode.Guid); Assert.Equal(actualNode.Offset, seekNode.Offset); Assert.Equal(actualNode.Timestamp, seekNode.Timestamp); for (int i = 0; i < actualNode.Data.Length; i++) { Assert.Equal(actualNode.Data[i], seekNode.Data[i]); } }
public void Selecting_A_Position_Forward_In_The_Stream_When_The_Current_Position_Is_Not_Zero_Will_Read_That_Node() { _StateResolver = new StateResolver(); var controller = new WeatherStateController(new WeatherSimulator()); _StateResolver.Add(controller); var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); var stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream = new CaptureStream(stream, System.IO.FileAccess.Read, _StateResolver); var desiredNode = Math.Round(Convert.ToDouble(captureStream.Count) / 2); //read up the number of nodes to move the position pointer forwards in the stream for (int i = 0; i < desiredNode; i++) { captureStream.Read(); } //seek to the new position captureStream.Position += 2; //this node is equivalent to node desiredNode + 3 var seekNode = captureStream.Read(); //manually read nodes, when the desired node is reached it should match the node pulled out previously stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); captureStream = new CaptureStream(stream, FileAccess.Read, _StateResolver); ICaptureState actualNode = null; for (int i = 0; i < desiredNode + 3; i++) { actualNode = captureStream.Read(); } Assert.Equal(actualNode.Guid, seekNode.Guid); Assert.Equal(actualNode.Offset, seekNode.Offset); Assert.Equal(actualNode.Timestamp, seekNode.Timestamp); for (int i = 0; i < actualNode.Data.Length; i++) { Assert.Equal(actualNode.Data[i], seekNode.Data[i]); } }
public void Selecting_A_Position_Beyond_The_Length_Of_The_Stream_Will_Throw_An_Exception() { _StateResolver = new StateResolver(); var controller = new WeatherStateController(new WeatherSimulator()); _StateResolver.Add(controller); var ms = VastPark.FrameworkBase.IO.EmbeddedResource.GetMemoryStream("Continuum.Test.Samples.weather-simulation.continuum", Assembly.GetExecutingAssembly()); var stream = new ConcurrentStream(new MemoryStream(ms.ToArray())); var captureStream = new CaptureStream(stream, System.IO.FileAccess.Read, _StateResolver); Assert.Throws(typeof(Exception), new Assert.ThrowsDelegate(delegate { captureStream.Position = captureStream.Count + 1; })); }
public void Custom_Capture_Formats_Are_Recorded_Correctly() { var resetEvent = new SlimResetEvent(20); var desiredStates = 200; var generatedStates = 0; var ms = new MemoryStream(); var stream = new ConcurrentStream(ms); var weatherSimulator = new WeatherSimulator(); _StateResolver = new StateResolver(); //build the controller that manages weather states var controller = new WeatherStateController(weatherSimulator); //watch the simluator for the desired number of states weatherSimulator.NewTemperature += delegate { generatedStates++; if (generatedStates >= desiredStates) { weatherSimulator.Stop(); resetEvent.Set(); } }; //register it with the capture service _StateResolver = new StateResolver(); _StateResolver.Add(controller); //create the capture stream, will create an entry in the SAT for the WeatherStateController var captureStream = new CaptureStream(stream, FileAccess.Write, _StateResolver); //pass the controller the stream so that it can be written to controller.Initialise(captureStream); //start the simulator, the controller will watch for changes internally weatherSimulator.Start(); //wait until the event is raised [desiredStates] number of times resetEvent.Wait(); Assert.Equal(generatedStates, captureStream.Count); //rewind the stream and open it for reading, verify the values match stream.Position = 0; captureStream = new CaptureStream(stream, FileAccess.Read, _StateResolver); for (int i = 0; i < captureStream.Count; i++) { var state = captureStream.Read(); Assert.Equal(weatherSimulator.History[i], (state as WeatherCaptureState).Temperature); } }
public void CaptureStream_Supports_Writing_A_State_And_Then_Reading_It() { var stateController = new WeatherStateController(new WeatherSimulator()); var stateResolver = new StateResolver(); stateResolver.Add(stateController); var baseStream = new ConcurrentStream(new MemoryStream()); var captureStream = new CaptureStream(baseStream, FileAccess.ReadWrite, stateResolver); Assert.True(captureStream.CanRead); Assert.True(captureStream.CanWrite); //write a state then read it back var expectedBytes = Guid.NewGuid().ToByteArray(); captureStream.Write(new WeatherCaptureState(expectedBytes, stateController.Guid, DateTime.UtcNow, 0)); //the read pointer is still at the start of the stream var readState = captureStream.Read(); for (int i = 0; i < readState.Data.Length; i++) { Assert.Equal(expectedBytes[i], readState.Data[i]); } }