private void VerifyEmptyPacketFromServerToClient()
{
// Init
RailPacketToClient toClient = new RailPacketToClient();
Tick startingTick = TestUtils.CreateTick(4200);
Tick lastAckTick = TestUtils.CreateTick(4200 - 5);
toClient.Initialize(startingTick, lastAckTick, SequenceId.Start, new List <RailEvent>());
toClient.Populate(
new List <RailStateDelta>(),
new List <RailStateDelta>(),
new List <RailStateDelta>());
// Verify initialize
Assert.Equal(startingTick, toClient.SenderTick);
Assert.Equal(lastAckTick, toClient.LastAckTick);
// Encode
Assert.True(bitBuffer.Empty);
toClient.Encode(stateCreator.Object, eventCreator.Object, bitBuffer);
// Since the packet was empty, nothing was allocated
stateCreator.Verify(f => f.CreateState(It.IsAny <int>()), Times.Never);
stateCreator.Verify(f => f.CreateDelta(), Times.Never);
stateCreator.Verify(f => f.CreateRecord(), Times.Never);
stateCreator.Verify(f => f.EntityTypeCompressor, Times.Never);
eventCreator.Verify(f => f.CreateEvent(It.IsAny <int>()), Times.Never);
eventCreator.Verify(f => f.EventTypeCompressor, Times.Never);
// Bitbuffer was written to.
Assert.True(!bitBuffer.Empty);
// Decode
RailPacketFromServer fromServer = new RailPacketFromServer();
fromServer.Decode(
commandCreator.Object,
stateCreator.Object,
eventCreator.Object,
bitBuffer);
// Verify decoded packet
Assert.True(bitBuffer.IsFinished);
Assert.Equal(toClient, fromServer, new TestUtils.RailPacketComparer());
// Since the packet was empty, nothing was allocated
stateCreator.Verify(f => f.CreateState(It.IsAny <int>()), Times.Never);
stateCreator.Verify(f => f.CreateDelta(), Times.Never);
stateCreator.Verify(f => f.CreateRecord(), Times.Never);
stateCreator.Verify(f => f.EntityTypeCompressor, Times.Never);
eventCreator.Verify(f => f.CreateEvent(It.IsAny <int>()), Times.Never);
eventCreator.Verify(f => f.EventTypeCompressor, Times.Never);
}