/// <summary>1.</summary>
/// <remarks>
/// 1. create files with dfs
/// 2. write MIN_N_PACKET to MAX_N_PACKET packets
/// 3. close file
/// 4. open the same file
/// 5. read the bytes and compare results
/// </remarks>
/// <exception cref="System.IO.IOException"/>
private static void WriteSeveralPackets(string methodName)
{
Random r = FiTestUtil.Random.Get();
int nPackets = FiTestUtil.NextRandomInt(MinNPacket, MaxNPacket + 1);
int lastPacketSize = FiTestUtil.NextRandomInt(1, PacketSize + 1);
int size = (nPackets - 1) * PacketSize + lastPacketSize;
FiTestUtil.Log.Info("size=" + size + ", nPackets=" + nPackets + ", lastPacketSize="
+ lastPacketSize);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(Replication
+ 2).Build();
FileSystem dfs = cluster.GetFileSystem();
try
{
Path p = new Path("/" + methodName + "/foo");
FSDataOutputStream @out = CreateFile(dfs, p);
long seed = r.NextLong();
Random ran = new Random(seed);
ran.NextBytes(bytes);
@out.Write(bytes, 0, size);
@out.Close();
FSDataInputStream @in = dfs.Open(p);
int totalRead = 0;
int nRead = 0;
while ((nRead = @in.Read(toRead, totalRead, size - totalRead)) > 0)
{
totalRead += nRead;
}
NUnit.Framework.Assert.AreEqual("Cannot read file.", size, totalRead);
for (int i = 0; i < size; i++)
{
NUnit.Framework.Assert.IsTrue("File content differ.", bytes[i] == toRead[i]);
}
}
finally
{
dfs.Close();
cluster.Shutdown();
}
}
