From e9a5411d31a65ab3bcd3313f7bb567fcaa908ef6 Mon Sep 17 00:00:00 2001
From: Yannick Lecaillez <yannick.lecaillez@forgerock.com>
Date: Thu, 02 Jul 2015 14:51:49 +0000
Subject: [PATCH] OPENDJ-2189: Empty EntryIDSet are kept rather than deleted.

---
 opendj-sdk/opendj-server-legacy/src/test/java/org/opends/server/backends/pluggable/DefaultIndexTest.java |  298 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 298 insertions(+), 0 deletions(-)

diff --git a/opendj-sdk/opendj-server-legacy/src/test/java/org/opends/server/backends/pluggable/DefaultIndexTest.java b/opendj-sdk/opendj-server-legacy/src/test/java/org/opends/server/backends/pluggable/DefaultIndexTest.java
new file mode 100644
index 0000000..3b717a8
--- /dev/null
+++ b/opendj-sdk/opendj-server-legacy/src/test/java/org/opends/server/backends/pluggable/DefaultIndexTest.java
@@ -0,0 +1,298 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
+ * or http://forgerock.org/license/CDDLv1.0.html.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at legal-notices/CDDLv1_0.txt.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information:
+ *      Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ *
+ *
+ *      Copyright 2015 ForgeRock AS
+ */
+package org.opends.server.backends.pluggable;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.forgerock.opendj.ldap.ByteString.valueOf;
+import static org.mockito.Matchers.*;
+import static org.mockito.Mockito.*;
+import static org.opends.server.backends.pluggable.EntryIDSet.*;
+import static org.opends.server.backends.pluggable.State.IndexFlag.*;
+import static org.opends.server.backends.pluggable.Utils.assertIdsEquals;
+
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.NoSuchElementException;
+import java.util.TreeMap;
+
+import org.forgerock.opendj.ldap.ByteSequence;
+import org.forgerock.opendj.ldap.ByteString;
+import org.opends.server.DirectoryServerTestCase;
+import org.opends.server.backends.pluggable.State.IndexFlag;
+import org.opends.server.backends.pluggable.spi.Cursor;
+import org.opends.server.backends.pluggable.spi.ReadableTransaction;
+import org.opends.server.backends.pluggable.spi.StorageRuntimeException;
+import org.opends.server.backends.pluggable.spi.TreeName;
+import org.opends.server.backends.pluggable.spi.UpdateFunction;
+import org.opends.server.backends.pluggable.spi.WriteableTransaction;
+import org.testng.annotations.BeforeTest;
+import org.testng.annotations.Test;
+
+@Test(groups = { "precommit", "pluggablebackend" }, sequential = true)
+public class DefaultIndexTest extends DirectoryServerTestCase
+{
+
+  private DefaultIndex index;
+  private WriteableTransaction txn;
+
+  @BeforeTest
+  public void setUp() {
+    txn = new DummyWriteableTransaction();
+    index = newIndex("test", 5, EnumSet.of(TRUSTED, COMPACTED));;
+    index.open(txn);
+  }
+
+  @Test
+  public void testUpdateAddedIDs() {
+    update(newDefinedSet(), newDefinedSet(1, 2, 3, 4));
+
+    assertIdsEquals(get(), 1, 2, 3, 4);
+  }
+
+  @Test
+  public void testUpdateDeletedIDs() {
+    put(newDefinedSet(1, 2, 3, 4));
+    update(newDefinedSet(2, 4), newDefinedSet());
+
+    assertIdsEquals(get(), 1, 3);
+  }
+
+  @Test
+  public void testUpdateMixedIDs() {
+    put(newDefinedSet(1, 2, 3, 4));
+    update(newDefinedSet(2, 4), newDefinedSet(5, 6));
+
+    assertIdsEquals(get(), 1, 3, 5, 6);
+  }
+
+  @Test
+  public void testAllIDs() {
+    put(newDefinedSet(1, 2, 3, 4));
+    update(newDefinedSet(1, 2), newDefinedSet(5, 6, 7, 8));
+
+    assertThat(get().isDefined()).isFalse();
+  }
+
+  @Test
+  public void testEmptyIdSetAreRemoved() {
+    put(newDefinedSet(1, 2, 3, 4));
+    update(newDefinedSet(1, 2, 3, 4), newDefinedSet());
+
+    assertThat(txn.read(index.getName(), valueOf("key"))).isNull();
+  }
+
+  private void update(EntryIDSet deletedIDSet, EntryIDSet addedIDSet) {
+    index.update(txn, valueOf("key"), deletedIDSet, addedIDSet);
+  }
+
+  private void put(EntryIDSet idSet)
+  {
+    txn.put(index.getName(), valueOf("key"), CODEC_V2.encode(idSet));
+  }
+
+  private ByteString getFromDb() {
+    return txn.read(index.getName(), valueOf("key"));
+  }
+
+  private EntryIDSet get() {
+    return CODEC_V2.decode(valueOf("key"), getFromDb());
+  }
+
+  private static DefaultIndex newIndex(String name, int indexLimit, EnumSet<IndexFlag> indexFlags)
+  {
+    final State state = mock(State.class);
+    when(state.getIndexFlags(any(ReadableTransaction.class), any(TreeName.class))).thenReturn(indexFlags);
+    return new DefaultIndex(new TreeName("dc=example,dc=com", name), state, indexLimit, mock(EntryContainer.class));
+  }
+
+  final static class DummyWriteableTransaction implements WriteableTransaction {
+
+    private final Map<TreeName, TreeMap<ByteString, ByteString>> storage = new HashMap<>();
+
+    @Override
+    public ByteString read(TreeName treeName, ByteSequence key)
+    {
+      return getTree(treeName).get(key);
+    }
+
+    private TreeMap<ByteString, ByteString> getTree(TreeName treeName) {
+      final TreeMap<ByteString, ByteString> tree = storage.get(treeName);
+      if ( tree == null ) {
+        throw new StorageRuntimeException("Tree " + treeName + " doesn't exists");
+      }
+      return tree;
+    }
+
+    @Override
+    public Cursor<ByteString, ByteString> openCursor(TreeName treeName)
+    {
+      final TreeMap<ByteString, ByteString> tree = getTree(treeName);
+
+      return new Cursor<ByteString, ByteString>()
+      {
+        private Iterator<Entry<ByteString, ByteString>> it = tree.entrySet().iterator();
+        private Entry<ByteString, ByteString> current;
+
+        @Override
+        public boolean next()
+        {
+          if(!it.hasNext()) {
+            return false;
+          }
+          current = it.next();
+          return true;
+        }
+
+        @Override
+        public boolean isDefined()
+        {
+          return current != null;
+        }
+
+        @Override
+        public ByteString getKey() throws NoSuchElementException
+        {
+          return current.getKey();
+        }
+
+        @Override
+        public ByteString getValue() throws NoSuchElementException
+        {
+          return current.getValue();
+        }
+
+        @Override
+        public void close()
+        {
+          it = null;
+          current = null;
+        }
+
+        @Override
+        public boolean positionToKey(ByteSequence key)
+        {
+          current = null;
+
+          it = tree.tailMap(key.toByteString()).entrySet().iterator();
+          if (it.hasNext() && it.next().getKey().equals(key.toByteString()))
+          {
+            return true;
+          }
+          return false;
+        }
+
+        @Override
+        public boolean positionToKeyOrNext(ByteSequence key)
+        {
+          current = null;
+
+          it = tree.tailMap(key.toByteString()).entrySet().iterator();
+          if( it.hasNext() ) {
+            it.next();
+            return true;
+          }
+          return false;
+        }
+
+        @Override
+        public boolean positionToLastKey()
+        {
+          current = null;
+
+          while(it.hasNext()) {
+            next();
+          }
+
+          return true;
+        }
+
+        @Override
+        public boolean positionToIndex(int index)
+        {
+          current = null;
+          it = tree.entrySet().iterator();
+          int i;
+          for(i = 0 ; i < index && it.hasNext() ; i++ ) {
+            next();
+          }
+          return i == index;
+        }
+      };
+    }
+
+    @Override
+    public long getRecordCount(TreeName treeName)
+    {
+      return getTree(treeName).size();
+    }
+
+    @Override
+    public void openTree(TreeName name)
+    {
+      storage.put(name, new TreeMap<ByteString, ByteString>());
+    }
+
+    @Override
+    public void renameTree(TreeName oldName, TreeName newName)
+    {
+      storage.put(newName, storage.remove(oldName));
+    }
+
+    @Override
+    public void deleteTree(TreeName name)
+    {
+      storage.remove(name);
+    }
+
+    @Override
+    public void put(TreeName treeName, ByteSequence key, ByteSequence value)
+    {
+      getTree(treeName).put(key.toByteString(), value.toByteString());
+    }
+
+    @Override
+    public boolean update(TreeName treeName, ByteSequence key, UpdateFunction f)
+    {
+      final ByteString oldValue = getTree(treeName).get(key);
+      final ByteSequence newValue = f.computeNewValue(oldValue);
+      if (newValue == null) {
+        return getTree(treeName).remove(key) != null;
+      }
+      return newValue.equals(getTree(treeName).put(key.toByteString(), newValue.toByteString()));
+    }
+
+    @Override
+    public boolean delete(TreeName treeName, ByteSequence key)
+    {
+      return getTree(treeName).remove(key) != null;
+    }
+
+  }
+
+}

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