public void CreateBlock_FileHeader()
{
var blocktype = DragonTapeBlockType.Header;
var payload = new byte[] { 66, 65, 82, 66, 65, 82, 32, 32, 2, 0, 0, 195, 80, 39, 16 };
var checksum = 0x45;
var block = DragonTapeBlock.CreateBlock(blocktype, payload, 0, payload.Length, checksum);
Assert.Equal(blocktype, block.BlockType);
Assert.Equal(checksum, block.Checksum);
Assert.Equal(payload.Length, block.Length);
var data = block.Data;
for (int i = 0; i < payload.Length; i++)
{
Assert.Equal(payload[i], data[i]);
}
Assert.True(block is DragonTapeHeaderBlock);
var header = (DragonTapeHeaderBlock)block;
Assert.Equal("BARBAR", header.Filename);
Assert.Equal(DragonFileType.MachineCode, header.FileType);
Assert.False(header.IsAscii);
Assert.False(header.IsGapped);
Assert.Equal(10000, header.LoadAddress);
Assert.Equal(50000, header.StartAddress);
block.Validate();
}
public void CreateBlock_InvalidChecksum()
{
var blocktype = DragonTapeBlockType.Header;
var payload = new byte[] { 66, 65, 82, 66, 65, 82, 32, 32, 2, 0, 0, 195, 80, 39, 16 };
var checksum = 0;
var block = DragonTapeBlock.CreateBlock(blocktype, payload, 0, payload.Length, checksum);
Assert.Equal(blocktype, block.BlockType);
Assert.Equal(checksum, block.Checksum);
Assert.Equal(payload.Length, block.Length);
var data = block.Data;
for (int i = 0; i < data.Length; i++)
{
Assert.Equal(payload[i], data[i]);
}
try
{
block.Validate();
Assert.True(false, "This block has an invalid checksum and should not pass validation.");
}
catch (InvalidBlockChecksumException) {}
}
public void CreateDragonTapeDataBlock_PayloadTooLarge_ThrowsException()
{
var payload = new byte[256];
DragonTapeBlock block = null;
try
{
block = new DragonTapeDataBlock(payload);
Assert.True(false, "Block with too large payload incorrectly created.");
}
catch (ArgumentOutOfRangeException) {}
}
private void DumpBlocks(string tapefile)
{
//TODO Print more information about each tape block
using (var tape = new CasTape(new FileStream(tapefile, FileMode.Open, FileAccess.Read)))
{
try
{
while (true)
{
var block = DragonTapeBlock.ReadBlock(tape, 1);
Console.WriteLine(block.ToString());
}
}
catch (EndOfTapeException)
{
return;
}
}
}
public void ReadBlock_NotSynchronized()
{
var tapedata = new byte[] { 0xbc, 0x45, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x3c, 0x00, 0x0f, 0x46, 0x4f, 0x4f, 0x42, 0x41, 0x52, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x55, 0x00 };
var tapefile = new MemoryStream(tapedata, false);
var tape = new CasTape(tapefile);
var block = DragonTapeBlock.ReadBlock(tape, 5);
Assert.Equal(DragonTapeBlockType.Header, block.BlockType);
Assert.Equal(15, block.Length);
Assert.Equal(0x08, block.Checksum);
var headerblock = (DragonTapeHeaderBlock)block;
Assert.Equal("FOOBAR", headerblock.Filename);
Assert.Equal(DragonFileType.Basic, headerblock.FileType);
Assert.False(headerblock.IsAscii);
Assert.False(headerblock.IsGapped);
block.Validate();
}
