public virtual void TestClearQuota()
{
Path dir = new Path("/TestSnapshot");
hdfs.Mkdirs(dir);
hdfs.AllowSnapshot(dir);
hdfs.SetQuota(dir, HdfsConstants.QuotaDontSet, HdfsConstants.QuotaDontSet);
INodeDirectory dirNode = fsdir.GetINode4Write(dir.ToString()).AsDirectory();
NUnit.Framework.Assert.IsTrue(dirNode.IsSnapshottable());
NUnit.Framework.Assert.AreEqual(0, dirNode.GetDiffs().AsList().Count);
hdfs.SetQuota(dir, HdfsConstants.QuotaDontSet - 1, HdfsConstants.QuotaDontSet - 1
);
dirNode = fsdir.GetINode4Write(dir.ToString()).AsDirectory();
NUnit.Framework.Assert.IsTrue(dirNode.IsSnapshottable());
NUnit.Framework.Assert.AreEqual(0, dirNode.GetDiffs().AsList().Count);
hdfs.SetQuota(dir, HdfsConstants.QuotaReset, HdfsConstants.QuotaReset);
dirNode = fsdir.GetINode4Write(dir.ToString()).AsDirectory();
NUnit.Framework.Assert.IsTrue(dirNode.IsSnapshottable());
NUnit.Framework.Assert.AreEqual(0, dirNode.GetDiffs().AsList().Count);
// allow snapshot on dir and create snapshot s1
SnapshotTestHelper.CreateSnapshot(hdfs, dir, "s1");
// clear quota of dir
hdfs.SetQuota(dir, HdfsConstants.QuotaReset, HdfsConstants.QuotaReset);
// dir should still be a snapshottable directory
dirNode = fsdir.GetINode4Write(dir.ToString()).AsDirectory();
NUnit.Framework.Assert.IsTrue(dirNode.IsSnapshottable());
NUnit.Framework.Assert.AreEqual(1, dirNode.GetDiffs().AsList().Count);
SnapshottableDirectoryStatus[] status = hdfs.GetSnapshottableDirListing();
NUnit.Framework.Assert.AreEqual(1, status.Length);
NUnit.Framework.Assert.AreEqual(dir, status[0].GetFullPath());
Path subDir = new Path(dir, "sub");
hdfs.Mkdirs(subDir);
hdfs.CreateSnapshot(dir, "s2");
Path file = new Path(subDir, "file");
DFSTestUtil.CreateFile(hdfs, file, Blocksize, Replication, seed);
hdfs.SetQuota(dir, HdfsConstants.QuotaReset, HdfsConstants.QuotaReset);
INode subNode = fsdir.GetINode4Write(subDir.ToString());
NUnit.Framework.Assert.IsTrue(subNode.AsDirectory().IsWithSnapshot());
IList <DirectoryWithSnapshotFeature.DirectoryDiff> diffList = subNode.AsDirectory(
).GetDiffs().AsList();
NUnit.Framework.Assert.AreEqual(1, diffList.Count);
Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot s2 = dirNode.GetSnapshot
(DFSUtil.String2Bytes("s2"));
NUnit.Framework.Assert.AreEqual(s2.GetId(), diffList[0].GetSnapshotId());
IList <INode> createdList = diffList[0].GetChildrenDiff().GetList(Diff.ListType.Created
);
NUnit.Framework.Assert.AreEqual(1, createdList.Count);
NUnit.Framework.Assert.AreSame(fsdir.GetINode4Write(file.ToString()), createdList
[0]);
}