public void FirstSyncPulseGenerationWorksAsExpected()
{
// --- Arrange
const int PILOT_PL = TapeDataBlockPlayer.PILOT_PL;
const int HEADER_PILOT_COUNT = TapeDataBlockPlayer.HEADER_PILOT_COUNT;
const int SYNC_1_PL = TapeDataBlockPlayer.SYNC_1_PL;
const long PILOT_END = PILOT_PL * HEADER_PILOT_COUNT;
const long START = 123456789L;
var player = TapPlayerHelper.CreatePlayer(TAPESET);
player.InitPlay(START);
// --- This is a standard ROM header data block
var block = player.CurrentBlock as TapDataBlock;
// --- Skip all pilot pulses
for (long pos = 0; pos < PILOT_END; pos += 50)
{
block.GetEarBit(START + pos);
}
// --- Act/Assert
for (var pos = PILOT_END + 50; pos < PILOT_END + SYNC_1_PL; pos += 50)
{
var earBit = block.GetEarBit(START + pos);
earBit.ShouldBeFalse();
block.PlayPhase.ShouldBe(PlayPhase.Sync);
}
}
public void PlayMovesToNextBlock()
{
// --- Arrange
var player = TapPlayerHelper.CreatePlayer(TAPESET);
player.InitPlay(100);
var currentBlock = player.CurrentBlock as TapDataBlock;
// --- Act
var indexBefore = player.CurrentBlockIndex;
currentBlock.CompleteBlock();
var lastTact = currentBlock.LastTact;
player.GetEarBit(lastTact);
var indexAfter = player.CurrentBlockIndex;
// --- Assert
indexBefore.ShouldBe(0);
indexAfter.ShouldBe(1);
currentBlock = player.CurrentBlock as TapDataBlock;
currentBlock.ShouldNotBeNull();
currentBlock.PlayPhase.ShouldBe(PlayPhase.Pilot);
currentBlock.StartTact.ShouldBe(lastTact);
currentBlock.ByteIndex.ShouldBe(0);
currentBlock.BitMask.ShouldBe((byte)0x80);
}
public void SecondPilotPulseGenerationWorks()
{
// --- Arrange
const int PILOT_PL = TapeDataBlockPlayer.PILOT_PL;
const long START = 123456789L;
var player = TapPlayerHelper.CreatePlayer(TAPESET);
player.InitPlay(START);
// --- This is a standard ROM header data block
var block = player.CurrentBlock as TapDataBlock;
// --- Skip EAR bits of the first pluse
for (long pos = 0; pos < PILOT_PL; pos += 50)
{
block.GetEarBit(START + pos);
}
// --- Act/Assert
for (long pos = PILOT_PL; pos < 2 * PILOT_PL; pos += 50)
{
var earBit = block.GetEarBit(START + pos);
earBit.ShouldBeFalse();
block.PlayPhase.ShouldBe(PlayPhase.Pilot);
}
}
/// <summary>
/// Reads nad positions a standard speed data block to its data area
/// </summary>
/// <returns>Standard speed data block</returns>
private static TapDataBlock ReadAndPositionToDataSection()
{
const int PILOT_PL = TapeDataBlockPlayer.PILOT_PL;
const int HEADER_PILOT_COUNT = TapeDataBlockPlayer.HEADER_PILOT_COUNT;
const int SYNC_1_PL = TapeDataBlockPlayer.SYNC_1_PL;
const int SYNC_2_PL = TapeDataBlockPlayer.SYNC_2_PL;
const long PILOT_END = PILOT_PL * HEADER_PILOT_COUNT;
const long START = 123456789L;
var player = TapPlayerHelper.CreatePlayer(TAPESET);
player.InitPlay(START);
// --- This is a standard ROM header data block
var block = player.CurrentBlock as TapDataBlock;
// --- Skip all pilot pulses + the first sync pulse
for (long pos = 0; pos < PILOT_END + SYNC_1_PL; pos += 50)
{
block.GetEarBit(START + pos);
}
// --- Skip the second sync pulse
for (var pos = PILOT_END + SYNC_1_PL + 50; pos < PILOT_END + SYNC_1_PL + SYNC_2_PL; pos += 50)
{
block.GetEarBit(START + pos);
}
return(block);
}
/// <summary>
/// Tests a pilot pulse
/// </summary>
/// <param name="pulseIndex">The index of the pilor pulse</param>
private void TestPilotPulsePlayback(int pulseIndex)
{
// --- Arrange
const int PILOT_PL = TapeDataBlockPlayer.PILOT_PL;
const long START = 123456789L;
var player = TapPlayerHelper.CreatePlayer(TAPESET);
player.InitPlay(START);
// --- This is a standard ROM header data block
var block = player.CurrentBlock as TapDataBlock;
var prevPulseEnd = PILOT_PL * (pulseIndex - 1);
// --- Skip EAR bits of the previous pulses
for (long pos = 0; pos < prevPulseEnd; pos += 50)
{
block.GetEarBit(START + pos);
}
// --- Act/Assert
for (var pos = prevPulseEnd + 50; pos < prevPulseEnd + PILOT_PL; pos += 50)
{
var earBit = block.GetEarBit(START + pos);
earBit.ShouldBe(pulseIndex % 2 == 1);
block.PlayPhase.ShouldBe(PlayPhase.Pilot);
}
}
public void TapFileCanBeReadSuccessfully()
{
// --- Act
var player = TapPlayerHelper.CreatePlayer(TAPESET);
// --- Assert
player.DataBlocks.Count.ShouldBe(4);
player.Eof.ShouldBeFalse();
}
public void InitPlayWorksAsExpected()
{
// --- Arrange
var player = TapPlayerHelper.CreatePlayer(TAPESET);
// --- Act
player.InitPlay(100);
// --- Assert
player.PlayPhase.ShouldBe(PlayPhase.None);
player.StartTact.ShouldBe(100);
player.CurrentBlockIndex.ShouldBe(0);
}
public void InitPlayInitializesTheFirstDataBlock()
{
// --- Arrange
var player = TapPlayerHelper.CreatePlayer(TAPESET);
// --- Act
player.InitPlay(100);
// --- Assert
var currentBlock = player.CurrentBlock as TapDataBlock;
currentBlock.ShouldNotBeNull();
currentBlock.PlayPhase.ShouldBe(PlayPhase.Pilot);
currentBlock.StartTact.ShouldBe(player.StartTact);
currentBlock.ByteIndex.ShouldBe(0);
currentBlock.BitMask.ShouldBe((byte)0x80);
}
public void PlayDoesNotSetEofUntilEnd()
{
// --- Arrange
var player = TapPlayerHelper.CreatePlayer(TAPESET);
player.InitPlay(100);
for (var i = 0; i < 3; i++) // Block 3 is a middle block
{
var currentBlock = player.CurrentBlock as TapDataBlock;
currentBlock.CompleteBlock();
var lastTact = currentBlock.LastTact;
player.GetEarBit(lastTact);
}
// --- Act
var lastBlock = player.CurrentBlock as TapDataBlock;
lastBlock.ReadUntilPause();
// --- Assert
player.Eof.ShouldBeFalse();
}
public void PlaySetsEofAtTheLastPlayableBlock()
{
// --- Arrange
var player = TapPlayerHelper.CreatePlayer(TAPESET);
player.InitPlay(100);
for (var i = 0; i < 4; i++) // Block 4 is the last
{
var currentBlock = player.CurrentBlock as TapDataBlock;
currentBlock.CompleteBlock();
var lastTact = currentBlock.LastTact;
player.GetEarBit(lastTact);
}
// --- Act
var lastBlock = player.CurrentBlock as TapDataBlock;
var lastPos = lastBlock.ReadUntilPause();
player.GetEarBit(lastPos);
// --- Assert
player.Eof.ShouldBeTrue();
}