Test for WriteBatchWithIndex#newIteratorWithBase(org.rocksdb.RocksIterator)

java/Makefile

@@ -81,6 +81,7 @@ JAVA_TESTS = org.rocksdb.test.BackupableDBOptionsTest\
 		org.rocksdb.test.WriteBatchHandlerTest\
 		org.rocksdb.test.WriteBatchTest\
 		org.rocksdb.test.WriteOptionsTest\
+		org.rocksdb.test.WriteBatchWithIndexTest
 
 JAVA_TEST_LIBDIR = ./test-libs/
 JAVA_JUNIT_JAR = $(JAVA_TEST_LIBDIR)junit-4.12-beta-2.jar

java/org/rocksdb/test/WriteBatchWithIndexTest.java

+//  Copyright (c) 2014, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under the BSD-style license found in the
+//  LICENSE file in the root directory of this source tree. An additional grant
+//  of patent rights can be found in the PATENTS file in the same directory.
+//
+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+package org.rocksdb.test;
+
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.rocksdb.*;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+public class WriteBatchWithIndexTest {
+
+  @ClassRule
+  public static final RocksMemoryResource rocksMemoryResource =
+      new RocksMemoryResource();
+
+  @Rule
+  public TemporaryFolder dbFolder = new TemporaryFolder();
+
+  @Test
+  public void readYourOwnWrites() throws RocksDBException {
+    RocksDB db = null;
+    Options options = null;
+    try {
+      options = new Options();
+      // Setup options
+      options.setCreateIfMissing(true);
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath());
+
+      final byte[] k1 = "key1".getBytes();
+      final byte[] v1 = "value1".getBytes();
+      final byte[] k2 = "key2".getBytes();
+      final byte[] v2 = "value2".getBytes();
+
+      db.put(k1, v1);
+      db.put(k2, v2);
+
+      final WriteBatchWithIndex wbwi = new WriteBatchWithIndex(true);
+
+      RocksIterator base = null;
+      RocksIterator it = null;
+      try {
+        base = db.newIterator();
+        it = wbwi.newIteratorWithBase(base);
+
+        it.seek(k1);
+        assertThat(it.isValid()).isTrue();
+        assertThat(it.key()).isEqualTo(k1);
+        assertThat(it.value()).isEqualTo(v1);
+
+        it.seek(k2);
+        assertThat(it.isValid()).isTrue();
+        assertThat(it.key()).isEqualTo(k2);
+        assertThat(it.value()).isEqualTo(v2);
+
+        //put data to the write batch and make sure we can read it.
+        final byte[] k3 = "key3".getBytes();
+        final byte[] v3 = "value3".getBytes();
+        wbwi.put(k3, v3);
+        it.seek(k3);
+        assertThat(it.isValid()).isTrue();
+        assertThat(it.key()).isEqualTo(k3);
+        assertThat(it.value()).isEqualTo(v3);
+
+        //update k2 in the write batch and check the value
+        final byte[] v2Other = "otherValue2".getBytes();
+        wbwi.put(k2, v2Other);
+        it.seek(k2);
+        assertThat(it.isValid()).isTrue();
+        assertThat(it.key()).isEqualTo(k2);
+        assertThat(it.value()).isEqualTo(v2Other);
+
+        //remove k1 and make sure we can read back the write
+        wbwi.remove(k1);
+        it.seek(k1);
+        assertThat(it.key()).isNotEqualTo(k1);
+
+        //reinsert k1 and make sure we see the new value
+        final byte[] v1Other = "otherValue1".getBytes();
+        wbwi.put(k1, v1Other);
+        it.seek(k1);
+        assertThat(it.isValid()).isTrue();
+        assertThat(it.key()).isEqualTo(k1);
+        assertThat(it.value()).isEqualTo(v1Other);
+      } finally {
+        if (it != null) {
+          it.dispose();
+        }
+        if (base != null) {
+          base.dispose();
+        }
+      }
+
+    } finally {
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
+      }
+    }
+  }
+}