| public Write ( byte array, int offset, int count ) : void | ||
| array | byte |
/// A |
| offset | int |
/// A |
| count | int |
/// A |
| return | void | |
public void TestNonSequentialWriteToOneChunk()
{
string filename = "nonsequential1.txt";
GridFileStream gfs = fs.Create(filename);
Object id = gfs.GridFileInfo.Id;
int chunksize = gfs.GridFileInfo.ChunkSize;
gfs.Seek(chunksize / 2, SeekOrigin.Begin);
byte[] two = new byte[] { 2 };
for (int i = chunksize; i > chunksize / 2; i--)
{
gfs.Write(two, 0, 1);
}
gfs.Seek(0, SeekOrigin.Begin);
byte[] one = new byte[] { 1 };
for (int i = 0; i < chunksize / 2; i++)
{
gfs.Write(one, 0, 1);
}
gfs.Close();
Assert.AreEqual(1, CountChunks(filesystem, id));
Document chunk = GrabChunk(id, 0);
Binary b = (Binary)chunk["data"];
Assert.AreEqual(2, b.Bytes[chunksize - 1]);
Assert.AreEqual(2, b.Bytes[chunksize / 2]);
Assert.AreEqual(1, b.Bytes[chunksize / 2 - 1]);
Assert.AreEqual(1, b.Bytes[0]);
}
public void TestReadLengthIsSameAsWriteLength()
{
string filename = "readwritelength.txt";
GridFileStream gfs = fs.Create(filename);
int length = 0;
for (int i = 1; i <= 50; i++)
{
gfs.Write(BitConverter.GetBytes(i), 0, 4);
length += 4;
}
gfs.Close();
Assert.AreEqual(length, gfs.GridFileInfo.Length, "File length written is not the same as in gridfileinfo");
gfs = fs.OpenRead(filename);
byte[] buffer = new byte[16];
int read = 0;
int readLength = read;
while ((read = gfs.Read(buffer, 0, buffer.Length)) > 0)
{
readLength += read;
}
Assert.AreEqual(length, readLength, "Too much read back.");
}
public void TestNonSequentialWriteToTwoChunks()
{
GridFileStream gfs = fs.Create("nonsequential2.txt");
Object id = gfs.GridFileInfo.Id;
int chunks = 3;
int buffsize = 256 * 1024;
for (int c = 0; c < chunks; c++)
{
Byte[] buff = CreateBuffer(buffsize, (byte)c);
if (c == 2)
{
gfs.Seek(0, SeekOrigin.Begin); //On last chunk seek to start.
}
gfs.Write(buff, 0, buff.Length);
}
Assert.AreEqual(buffsize, gfs.Position, "Position is incorrect");
gfs.Close();
Assert.AreEqual(chunks - 1, CountChunks(filesystem, id));
Document chunk = GrabChunk(id, 0);
Binary b = (Binary)chunk["data"];
Assert.AreEqual(2, b.Bytes[buffsize - 1]);
Assert.AreEqual(2, b.Bytes[0]);
chunk = GrabChunk(id, 1);
b = (Binary)chunk["data"];
Assert.AreEqual(1, b.Bytes[buffsize - 1]);
}
public void TestNonSequentialWriteToPartialChunk()
{
string filename = "nonsequentialpartial.txt";
GridFileStream gfs = fs.Create(filename);
Object id = gfs.GridFileInfo.Id;
int chunksize = gfs.GridFileInfo.ChunkSize;
gfs.Write(BitConverter.GetBytes(0), 0, 4);
Assert.AreEqual(4, gfs.Position);
gfs.Write(BitConverter.GetBytes(7), 0, 4);
Assert.AreEqual(8, gfs.Position);
gfs.Seek(0, SeekOrigin.Begin);
gfs.Write(BitConverter.GetBytes(15), 0, 4);
gfs.Close();
Document chunk = GrabChunk(id, 0);
Binary b = (Binary)chunk["data"];
Assert.AreEqual(8, b.Bytes.Length);
}
public void TestWriteMultipleBytes()
{
GridFileStream gfs = fs.Create("multiplebytes.txt");
Object id = gfs.GridFileInfo.Id;
for (int x = 0; x < 256; x++)
{
gfs.Write(BitConverter.GetBytes(x), 0, 4);
}
gfs.Close();
Assert.AreEqual(1, CountChunks(filesystem, id));
}
public void TestWriteTo3Chunks()
{
GridFileStream gfs = fs.Create("largewrite.txt");
Object id = gfs.GridFileInfo.Id;
int chunks = 3;
int buffsize = 256 * 1024 * chunks;
Byte[] buff = CreateBuffer(buffsize, (byte)6);
gfs.Write(buff, 0, buff.Length);
Assert.AreEqual(buff.Length, gfs.Position);
gfs.Close();
Assert.AreEqual(chunks, CountChunks(filesystem, id));
}
protected Object CreateDummyFile(string filename, int size, int chunksize, int initialOffset)
{
GridFileInfo gfi = new GridFileInfo(DB, "gfstream", filename);
gfi.ChunkSize = chunksize;
GridFileStream gfs = gfi.Create();
Object id = gfs.GridFileInfo.Id;
byte[] buff = CreateIntBuffer(size);
gfs.Write(buff, initialOffset, buff.Length - initialOffset);
gfs.Close();
return(id);
}
public void TestOpenReadOnly()
{
string filename = "gfi-open.txt";
GridFile gf = new GridFile(DB, "gfopen");
GridFileStream gfs = gf.Create(filename);
gfs.Close();
gfs = gf.OpenRead(filename);
Assert.IsNotNull(gfs);
bool thrown = false;
try{
gfs.Write(new byte[] { 0 }, 0, 1);
}catch (System.NotSupportedException) {
thrown = true;
}catch (Exception ex) {
Assert.Fail("Wrong exception thrown " + ex.GetType().Name);
}
Assert.IsTrue(thrown, "NotSupportedException not thrown");
}
public void TestRead()
{
string filename = "readme.txt";
GridFileStream gfs = fs.Create(filename);
for (int i = 1; i <= 50; i++)
{
gfs.Write(BitConverter.GetBytes(i), 0, 4);
}
gfs.Close();
gfs = fs.OpenRead(filename);
Byte[] buff = new Byte[4];
int read;
for (int i = 1; i <= 50; i++)
{
read = gfs.Read(buff, 0, 4);
Assert.AreEqual(4, read, "Not enough bytes were read");
Assert.AreEqual(i, BitConverter.ToInt32(buff, 0), "value read back was not the same as written");
}
}
public void TestWriteWithMultipleFlushes()
{
string filename = "multiflush.txt";
GridFileStream gfs = fs.Create(filename);
Object id = gfs.GridFileInfo.Id;
int size = gfs.GridFileInfo.ChunkSize * 2;
byte[] buff;
int x = 0;
for (int i = 0; i < size; i += 4)
{
buff = BitConverter.GetBytes(x);
gfs.Write(buff, 0, buff.Length);
x++;
if (i % size / 4 == 0)
{
gfs.Flush();
}
}
gfs.Close();
gfs = fs.OpenRead(filename);
int read;
int val;
buff = new byte[4];
for (int i = 0; i < size / 4; i++)
{
read = gfs.Read(buff, 0, 4);
val = BitConverter.ToInt32(buff, 0);
Assert.AreEqual(4, read, "Not enough bytes were read. Pos: " + gfs.Position);
Assert.AreEqual(i, val, "value read back was not the same as written. Pos: " + gfs.Position);
}
}
