public void TestZap()
{
BlockListImpl list = new BlockListImpl();
// verify that you can zap anything
for (int j = -2; j < 10; j++)
{
list.Zap(j);
}
RawDataBlock[] blocks = new RawDataBlock[5];
for (int j = 0; j < 5; j++)
{
blocks[j] =
new RawDataBlock(new MemoryStream(new byte[512]));
}
ListManagedBlock[] tmp = (ListManagedBlock[])blocks;
list.SetBlocks(tmp);
for (int j = -2; j < 10; j++)
{
list.Zap(j);
}
// verify that all blocks are gone
for (int j = 0; j < 5; j++)
{
try
{
list.Remove(j);
Assert.Fail("removing item " + j + " should not have succeeded");
}
catch (IOException)
{
}
}
}
public void TestRemove()
{
BlockListImpl list = new BlockListImpl();
RawDataBlock[] blocks = new RawDataBlock[5];
byte[] data = new byte[512 * 5];
for (int j = 0; j < 5; j++)
{
for (int k = j * 512; k < (j * 512) + 512; k++)
{
data[k] = (byte)j;
}
}
MemoryStream stream = new MemoryStream(data);
for (int j = 0; j < 5; j++)
{
blocks[j] = new RawDataBlock(stream);
}
ListManagedBlock[] tmp = (ListManagedBlock[])blocks;
list.SetBlocks(ref tmp);
// verify that you can't Remove illegal indices
for (int j = -2; j < 10; j++)
{
if ((j < 0) || (j >= 5))
{
try
{
list.Remove(j);
Assert.Fail("removing item " + j + " should have Assert.Failed");
}
catch (IOException)
{
}
}
}
// verify we can safely and correctly Remove all blocks
for (int j = 0; j < 5; j++)
{
byte[] outPut = list.Remove(j).Data;
for (int k = 0; k < 512; k++)
{
Assert.AreEqual(data[(j * 512) + k], outPut[k], "testing block " + j + ", index " + k);
}
}
// verify that all blocks are gone
for (int j = 0; j < 5; j++)
{
try
{
list.Remove(j);
Assert.Fail("removing item " + j + " should not have succeeded");
}
catch (IOException)
{
}
}
}
public void TestFetchBlocks()
{
// strategy:
//
// 1. Set up a single BAT block from which to construct a
// BAT. create nonsense blocks in the raw data block ArrayList
// corresponding to the indices in the BAT block.
// 2. The indices will include very short documents (0 and 1
// block in Length), longer documents, and some screwed up
// documents (one with a loop, one that will peek into
// another document's data, one that includes an unused
// document, one that includes a reserved (BAT) block, one
// that includes a reserved (XBAT) block, and one that
// points off into space somewhere
BlockListImpl list = new BlockListImpl();
ArrayList raw_blocks = new ArrayList();
byte[] data = new byte[512];
int offset = 0;
LittleEndian.PutInt(data, offset, -3); // for the BAT block itself
offset += LittleEndianConstants.INT_SIZE;
// document 1: Is at end of file alReady; start block = -2
// document 2: has only one block; start block = 1
LittleEndian.PutInt(data, offset, -2);
offset += LittleEndianConstants.INT_SIZE;
// document 3: has a loop in it; start block = 2
LittleEndian.PutInt(data, offset, 2);
offset += LittleEndianConstants.INT_SIZE;
// document 4: peeks into document 2's data; start block = 3
LittleEndian.PutInt(data, offset, 4);
offset += LittleEndianConstants.INT_SIZE;
LittleEndian.PutInt(data, offset, 1);
offset += LittleEndianConstants.INT_SIZE;
// document 5: includes an unused block; start block = 5
LittleEndian.PutInt(data, offset, 6);
offset += LittleEndianConstants.INT_SIZE;
LittleEndian.PutInt(data, offset, -1);
offset += LittleEndianConstants.INT_SIZE;
// document 6: includes a BAT block; start block = 7
LittleEndian.PutInt(data, offset, 8);
offset += LittleEndianConstants.INT_SIZE;
LittleEndian.PutInt(data, offset, 0);
offset += LittleEndianConstants.INT_SIZE;
// document 7: includes an XBAT block; start block = 9
LittleEndian.PutInt(data, offset, 10);
offset += LittleEndianConstants.INT_SIZE;
LittleEndian.PutInt(data, offset, -4);
offset += LittleEndianConstants.INT_SIZE;
// document 8: goes off into space; start block = 11;
LittleEndian.PutInt(data, offset, 1000);
offset += LittleEndianConstants.INT_SIZE;
// document 9: no screw ups; start block = 12;
int index = 13;
for (; offset < 508; offset += LittleEndianConstants.INT_SIZE)
{
LittleEndian.PutInt(data, offset, index++);
}
LittleEndian.PutInt(data, offset, -2);
raw_blocks.Add(new RawDataBlock(new MemoryStream(data)));
for (int j = raw_blocks.Count; j < 128; j++)
{
raw_blocks.Add(
new RawDataBlock(new MemoryStream(new byte[0])));
}
ListManagedBlock[] tmp = (ListManagedBlock[])raw_blocks.ToArray(typeof(RawDataBlock));
list.SetBlocks(ref tmp);
int[] blocks =
{
0
};
BlockAllocationTableReader table =
new BlockAllocationTableReader(1, blocks, 0, -2, list);
int[] start_blocks =
{
-2, 1, 2, 3, 5, 7, 9, 11, 12
};
int[] expected_Length =
{
0, 1, -1, -1, -1, -1, -1, -1, 116
};
for (int j = 0; j < start_blocks.Length; j++)
{
try
{
ListManagedBlock[] dataBlocks =
list.FetchBlocks(start_blocks[j], -1);
if (expected_Length[j] == -1)
{
Assert.Fail("document " + j + " should have Assert.Failed");
}
else
{
Assert.AreEqual(expected_Length[j], dataBlocks.Length);
}
}
catch (IOException)
{
if (expected_Length[j] == -1)
{
// no problem, we expected a Assert.Failure here
}
else
{
throw;
}
}
}
}