public void TryReadWriteCycleWithAllBlocksOnDisk()
{
VirtualDisk virtualDisk = VirtualDiskTestFactory.ConstructDefaultTestDisk();
for (int i = 0; i < virtualDisk.NumberOfBlocks; i++)
{
byte[] bytesToWrite = new byte[virtualDisk.BlockSizeInBytes];
byte byteToPutInEveryPlaceInArray = (byte)i;
for (int j = 0; j < virtualDisk.BlockSizeInBytes; j++)
{
bytesToWrite[j] = byteToPutInEveryPlaceInArray;
}
virtualDisk.WriteBytesToBlock(i, bytesToWrite);
}
for (int i = 0; i < virtualDisk.NumberOfBlocks; i++)
{
byte[] bytesRead = virtualDisk.ReadAllBytesFromBlock(i);
byte byteThatMustBeInEveryPlaceInArray = (byte)i;
Assert.AreEqual(virtualDisk.BlockSizeInBytes, bytesRead.Length);
for (int j = 0; j < virtualDisk.BlockSizeInBytes; j++)
{
Assert.AreEqual(byteThatMustBeInEveryPlaceInArray, bytesRead[j]);
}
}
}
public void MakeSureYouCannotWriteTooMuchDataIntoDiskBlock()
{
VirtualDisk virtualDisk = VirtualDiskTestFactory.ConstructDefaultTestDisk();
byte[] bytesToWrite = new byte[virtualDisk.BlockSizeInBytes * 2];
ExceptionAssert.MakeSureExceptionIsRaisedBy <ArgumentException>(
delegate()
{
virtualDisk.WriteBytesToBlock(0, bytesToWrite);
});
}
public void TryWritingToNonExistingBlocksOnDisk()
{
VirtualDisk virtualDisk = VirtualDiskTestFactory.ConstructDefaultTestDisk();
byte[] bytesToWrite = new byte[100];
ExceptionAssert.MakeSureExceptionIsRaisedBy <ArgumentOutOfRangeException>(
delegate()
{
virtualDisk.WriteBytesToBlock(-2, bytesToWrite);
});
ExceptionAssert.MakeSureExceptionIsRaisedBy <ArgumentOutOfRangeException>(
delegate()
{
virtualDisk.WriteBytesToBlock(virtualDisk.NumberOfBlocks, bytesToWrite);
});
ExceptionAssert.MakeSureExceptionIsRaisedBy <ArgumentOutOfRangeException>(
delegate()
{
virtualDisk.WriteBytesToBlock(int.MaxValue, bytesToWrite);
});
}
