/// <exception cref="System.Exception"/>
private void TestTruncate(long newLength, long expectedDiff, long expectedUsage)
{
// before doing the real truncation, make sure the computation is correct
INodesInPath iip = fsdir.GetINodesInPath4Write(file.ToString());
INodeFile fileNode = iip.GetLastINode().AsFile();
fileNode.RecordModification(iip.GetLatestSnapshotId(), true);
long diff = fileNode.ComputeQuotaDeltaForTruncate(newLength);
NUnit.Framework.Assert.AreEqual(expectedDiff, diff);
// do the real truncation
dfs.Truncate(file, newLength);
// wait for truncate to finish
TestFileTruncate.CheckBlockRecovery(file, dfs);
INodeDirectory dirNode = fsdir.GetINode4Write(dir.ToString()).AsDirectory();
long spaceUsed = dirNode.GetDirectoryWithQuotaFeature().GetSpaceConsumed().GetStorageSpace
();
long diskUsed = dirNode.GetDirectoryWithQuotaFeature().GetSpaceConsumed().GetTypeSpaces
().Get(StorageType.Disk);
NUnit.Framework.Assert.AreEqual(expectedUsage, spaceUsed);
NUnit.Framework.Assert.AreEqual(expectedUsage, diskUsed);
}
