[RocksJava] Rebased + integrated CF tests

java/Makefile

@@ -47,8 +47,7 @@ ifeq ($(PLATFORM), OS_MACOSX)
 ROCKSDB_JAR = rocksdbjni-$(ROCKSDB_MAJOR).$(ROCKSDB_MINOR).$(ROCKSDB_PATCH)-osx.jar
 endif
 
-JAVA_TESTS = org.rocksdb.test.AbstractComparatorTest\
+JAVA_TESTS = org.rocksdb.test.BackupableDBTest\
-        org.rocksdb.test.BackupableDBTest\
 		org.rocksdb.test.BlockBasedTableConfigTest\
 		org.rocksdb.test.ColumnFamilyOptionsTest\
 		org.rocksdb.test.ColumnFamilyTest\
@@ -71,7 +70,7 @@ JAVA_TESTS = org.rocksdb.test.AbstractComparatorTest\
 		org.rocksdb.test.RocksIteratorTest\
 		org.rocksdb.test.SnapshotTest\
 		org.rocksdb.test.StatisticsCollectorTest\
-		org.rocksdb.test.WirteBatchHandlerTest\
+		org.rocksdb.test.WriteBatchHandlerTest\
 		org.rocksdb.test.WriteBatchTest\
 		org.rocksdb.test.WriteOptionsTest\
 

java/org/rocksdb/test/AbstractComparatorTest.java

@@ -12,6 +12,7 @@ import java.nio.file.*;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.Random;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.rocksdb.test.Types.byteToInt;
 import static org.rocksdb.test.Types.intToByte;
 
@@ -75,13 +76,13 @@ public abstract class AbstractComparatorTest {
       int count = 0;
       for (it.seekToFirst(); it.isValid(); it.next()) {
         final int thisKey = byteToInt(it.key());
-        assert(thisKey > lastKey);
+        assertThat(thisKey).isGreaterThan(lastKey);
         lastKey = thisKey;
         count++;
       }
       db.close();
 
-      assert(count == ITERATIONS);
+      assertThat(count).isEqualTo(ITERATIONS);
 
     } catch (final RocksDBException e) {
       System.err.format("[ERROR]: %s%n", e);

java/org/rocksdb/test/ColumnFamilyOptionsTest.java

@@ -5,225 +5,584 @@
 
 package org.rocksdb.test;
 
+import org.junit.ClassRule;
+import org.junit.Test;
 import org.rocksdb.*;
 
 import java.util.Random;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class ColumnFamilyOptionsTest {
-  static {
-    RocksDB.loadLibrary();
-  }
 
-  public static void testCFOptions(ColumnFamilyOptionsInterface opt) {
+  @ClassRule
-    Random rand = PlatformRandomHelper.
+  public static final RocksMemoryResource rocksMemoryResource =
+      new RocksMemoryResource();
+
+  public static final Random rand = PlatformRandomHelper.
       getPlatformSpecificRandomFactory();
-    { // WriteBufferSize test
+
+  @Test
+  public void writeBufferSize() throws RocksDBException {
+    ColumnFamilyOptions opt = null;
     try {
+      opt = new ColumnFamilyOptions();
       long longValue = rand.nextLong();
       opt.setWriteBufferSize(longValue);
-        assert(opt.writeBufferSize() == longValue);
+      assertThat(opt.writeBufferSize()).isEqualTo(longValue);
-      } catch (RocksDBException e) {
+    } finally {
-        assert(false);
+      if (opt != null) {
+        opt.dispose();
+      }
     }
   }
 
-    { // MaxWriteBufferNumber test
+  @Test
+  public void maxWriteBufferNumber() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setMaxWriteBufferNumber(intValue);
-      assert(opt.maxWriteBufferNumber() == intValue);
+      assertThat(opt.maxWriteBufferNumber()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MinWriteBufferNumberToMerge test
+  @Test
+  public void minWriteBufferNumberToMerge() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setMinWriteBufferNumberToMerge(intValue);
-      assert(opt.minWriteBufferNumberToMerge() == intValue);
+      assertThat(opt.minWriteBufferNumberToMerge()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // NumLevels test
+  @Test
+  public void numLevels() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setNumLevels(intValue);
-      assert(opt.numLevels() == intValue);
+      assertThat(opt.numLevels()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // LevelFileNumCompactionTrigger test
+  @Test
+  public void levelZeroFileNumCompactionTrigger() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setLevelZeroFileNumCompactionTrigger(intValue);
-      assert(opt.levelZeroFileNumCompactionTrigger() == intValue);
+      assertThat(opt.levelZeroFileNumCompactionTrigger()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // LevelSlowdownWritesTrigger test
+  @Test
+  public void levelZeroSlowdownWritesTrigger() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setLevelZeroSlowdownWritesTrigger(intValue);
-      assert(opt.levelZeroSlowdownWritesTrigger() == intValue);
+      assertThat(opt.levelZeroSlowdownWritesTrigger()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // LevelStopWritesTrigger test
+  @Test
+  public void levelZeroStopWritesTrigger() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setLevelZeroStopWritesTrigger(intValue);
-      assert(opt.levelZeroStopWritesTrigger() == intValue);
+      assertThat(opt.levelZeroStopWritesTrigger()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MaxMemCompactionLevel test
+  @Test
+  public void maxMemCompactionLevel() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setMaxMemCompactionLevel(intValue);
-      assert(opt.maxMemCompactionLevel() == intValue);
+      assertThat(opt.maxMemCompactionLevel()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // TargetFileSizeBase test
+  @Test
+  public void targetFileSizeBase() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       long longValue = rand.nextLong();
       opt.setTargetFileSizeBase(longValue);
-      assert(opt.targetFileSizeBase() == longValue);
+      assertThat(opt.targetFileSizeBase()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // TargetFileSizeMultiplier test
+  @Test
+  public void targetFileSizeMultiplier() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setTargetFileSizeMultiplier(intValue);
-      assert(opt.targetFileSizeMultiplier() == intValue);
+      assertThat(opt.targetFileSizeMultiplier()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MaxBytesForLevelBase test
+  @Test
+  public void maxBytesForLevelBase() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       long longValue = rand.nextLong();
       opt.setMaxBytesForLevelBase(longValue);
-      assert(opt.maxBytesForLevelBase() == longValue);
+      assertThat(opt.maxBytesForLevelBase()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MaxBytesForLevelMultiplier test
+  @Test
+  public void maxBytesForLevelMultiplier() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setMaxBytesForLevelMultiplier(intValue);
-      assert(opt.maxBytesForLevelMultiplier() == intValue);
+      assertThat(opt.maxBytesForLevelMultiplier()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // ExpandedCompactionFactor test
+  @Test
+  public void expandedCompactionFactor() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setExpandedCompactionFactor(intValue);
-      assert(opt.expandedCompactionFactor() == intValue);
+      assertThat(opt.expandedCompactionFactor()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // SourceCompactionFactor test
+  @Test
+  public void sourceCompactionFactor() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setSourceCompactionFactor(intValue);
-      assert(opt.sourceCompactionFactor() == intValue);
+      assertThat(opt.sourceCompactionFactor()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MaxGrandparentOverlapFactor test
+  @Test
+  public void maxGrandparentOverlapFactor() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setMaxGrandparentOverlapFactor(intValue);
-      assert(opt.maxGrandparentOverlapFactor() == intValue);
+      assertThat(opt.maxGrandparentOverlapFactor()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // SoftRateLimit test
+  @Test
+  public void softRateLimit() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       double doubleValue = rand.nextDouble();
       opt.setSoftRateLimit(doubleValue);
-      assert(opt.softRateLimit() == doubleValue);
+      assertThat(opt.softRateLimit()).isEqualTo(doubleValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // HardRateLimit test
+  @Test
+  public void hardRateLimit() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       double doubleValue = rand.nextDouble();
       opt.setHardRateLimit(doubleValue);
-      assert(opt.hardRateLimit() == doubleValue);
+      assertThat(opt.hardRateLimit()).isEqualTo(doubleValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // RateLimitDelayMaxMilliseconds test
+  @Test
+  public void rateLimitDelayMaxMilliseconds() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setRateLimitDelayMaxMilliseconds(intValue);
-      assert(opt.rateLimitDelayMaxMilliseconds() == intValue);
+      assertThat(opt.rateLimitDelayMaxMilliseconds()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // ArenaBlockSize test
+  @Test
+  public void arenaBlockSize() throws RocksDBException {
+    ColumnFamilyOptions opt = null;
     try {
+      opt = new ColumnFamilyOptions();
       long longValue = rand.nextLong();
       opt.setArenaBlockSize(longValue);
-        assert(opt.arenaBlockSize() == longValue);
+      assertThat(opt.arenaBlockSize()).isEqualTo(longValue);
-      } catch (RocksDBException e) {
+    } finally {
-        assert(false);
+      if (opt != null) {
+        opt.dispose();
+      }
     }
   }
 
-    { // DisableAutoCompactions test
+  @Test
+  public void disableAutoCompactions() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       boolean boolValue = rand.nextBoolean();
       opt.setDisableAutoCompactions(boolValue);
-      assert(opt.disableAutoCompactions() == boolValue);
+      assertThat(opt.disableAutoCompactions()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // PurgeRedundantKvsWhileFlush test
+  @Test
+  public void purgeRedundantKvsWhileFlush() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       boolean boolValue = rand.nextBoolean();
       opt.setPurgeRedundantKvsWhileFlush(boolValue);
-      assert(opt.purgeRedundantKvsWhileFlush() == boolValue);
+      assertThat(opt.purgeRedundantKvsWhileFlush()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // VerifyChecksumsInCompaction test
+  @Test
+  public void verifyChecksumsInCompaction() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       boolean boolValue = rand.nextBoolean();
       opt.setVerifyChecksumsInCompaction(boolValue);
-      assert(opt.verifyChecksumsInCompaction() == boolValue);
+      assertThat(opt.verifyChecksumsInCompaction()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // FilterDeletes test
+  @Test
+  public void filterDeletes() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       boolean boolValue = rand.nextBoolean();
       opt.setFilterDeletes(boolValue);
-      assert(opt.filterDeletes() == boolValue);
+      assertThat(opt.filterDeletes()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MaxSequentialSkipInIterations test
+  @Test
+  public void maxSequentialSkipInIterations() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       long longValue = rand.nextLong();
       opt.setMaxSequentialSkipInIterations(longValue);
-      assert(opt.maxSequentialSkipInIterations() == longValue);
+      assertThat(opt.maxSequentialSkipInIterations()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // InplaceUpdateSupport test
+  @Test
+  public void inplaceUpdateSupport() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       boolean boolValue = rand.nextBoolean();
       opt.setInplaceUpdateSupport(boolValue);
-      assert(opt.inplaceUpdateSupport() == boolValue);
+      assertThat(opt.inplaceUpdateSupport()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // InplaceUpdateNumLocks test
+  @Test
+  public void inplaceUpdateNumLocks() throws RocksDBException {
+    ColumnFamilyOptions opt = null;
     try {
+      opt = new ColumnFamilyOptions();
       long longValue = rand.nextLong();
       opt.setInplaceUpdateNumLocks(longValue);
-        assert(opt.inplaceUpdateNumLocks() == longValue);
+      assertThat(opt.inplaceUpdateNumLocks()).isEqualTo(longValue);
-      } catch (RocksDBException e) {
+    } finally {
-        assert(false);
+      if (opt != null) {
+        opt.dispose();
+      }
     }
   }
 
-    { // MemtablePrefixBloomBits test
+  @Test
+  public void memtablePrefixBloomBits() {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
       int intValue = rand.nextInt();
       opt.setMemtablePrefixBloomBits(intValue);
-      assert(opt.memtablePrefixBloomBits() == intValue);
+      assertThat(opt.memtablePrefixBloomBits()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MemtablePrefixBloomProbes test
+  @Test
+  public void memtablePrefixBloomProbes() {
+    ColumnFamilyOptions opt = null;
+    try {
       int intValue = rand.nextInt();
+      opt = new ColumnFamilyOptions();
       opt.setMemtablePrefixBloomProbes(intValue);
-      assert(opt.memtablePrefixBloomProbes() == intValue);
+      assertThat(opt.memtablePrefixBloomProbes()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // BloomLocality test
+  @Test
+  public void bloomLocality() {
+    ColumnFamilyOptions opt = null;
+    try {
       int intValue = rand.nextInt();
+      opt = new ColumnFamilyOptions();
       opt.setBloomLocality(intValue);
-      assert(opt.bloomLocality() == intValue);
+      assertThat(opt.bloomLocality()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    { // MaxSuccessiveMerges test
+  @Test
+  public void maxSuccessiveMerges() throws RocksDBException {
+    ColumnFamilyOptions opt = null;
     try {
       long longValue = rand.nextLong();
+      opt = new ColumnFamilyOptions();
       opt.setMaxSuccessiveMerges(longValue);
-        assert(opt.maxSuccessiveMerges() == longValue);
+      assertThat(opt.maxSuccessiveMerges()).isEqualTo(longValue);
-      } catch (RocksDBException e){
+    } finally {
-        assert(false);
+      if (opt != null) {
+        opt.dispose();
+      }
     }
   }
 
-    { // MinPartialMergeOperands test
+  @Test
+  public void minPartialMergeOperands() {
+    ColumnFamilyOptions opt = null;
+    try {
       int intValue = rand.nextInt();
+      opt = new ColumnFamilyOptions();
       opt.setMinPartialMergeOperands(intValue);
-      assert(opt.minPartialMergeOperands() == intValue);
+      assertThat(opt.minPartialMergeOperands()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
     }
   }
 
-  public static void main(String[] args) {
+  @Test
-    ColumnFamilyOptions opt = new ColumnFamilyOptions();
+  public void memTable() throws RocksDBException {
-    testCFOptions(opt);
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
+      opt.setMemTableConfig(new HashLinkedListMemTableConfig());
+      assertThat(opt.memTableFactoryName()).
+          isEqualTo("HashLinkedListRepFactory");
+    } finally {
+      if (opt != null) {
         opt.dispose();
-    System.out.println("Passed DBOptionsTest");
+      }
+    }
+  }
+
+  @Test
+  public void comparator() throws RocksDBException {
+    ColumnFamilyOptions opt = null;
+    try {
+      opt = new ColumnFamilyOptions();
+      opt.setComparator(BuiltinComparator.BYTEWISE_COMPARATOR);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
+  }
+
+  @Test
+  public void linkageOfPrepMethods() {
+    ColumnFamilyOptions options = null;
+    try {
+      options = new ColumnFamilyOptions();
+      options.optimizeUniversalStyleCompaction();
+      options.optimizeUniversalStyleCompaction(4000);
+      options.optimizeLevelStyleCompaction();
+      options.optimizeLevelStyleCompaction(3000);
+      options.optimizeForPointLookup(10);
+    } finally {
+      if (options != null) {
+        options.dispose();
+      }
+    }
+  }
+
+  @Test
+  public void shouldSetTestPrefixExtractor() {
+    ColumnFamilyOptions options = null;
+    try {
+      options = new ColumnFamilyOptions();
+      options.useFixedLengthPrefixExtractor(100);
+      options.useFixedLengthPrefixExtractor(10);
+    } finally {
+      if (options != null) {
+        options.dispose();
+      }
+    }
+  }
+
+  @Test
+  public void compressionTypes() {
+    ColumnFamilyOptions ColumnFamilyOptions = null;
+    try {
+      ColumnFamilyOptions = new ColumnFamilyOptions();
+      for (CompressionType compressionType :
+          CompressionType.values()) {
+        ColumnFamilyOptions.setCompressionType(compressionType);
+        assertThat(ColumnFamilyOptions.compressionType()).
+            isEqualTo(compressionType);
+        assertThat(CompressionType.valueOf("NO_COMPRESSION")).
+            isEqualTo(CompressionType.NO_COMPRESSION);
+      }
+    } finally {
+      if (ColumnFamilyOptions != null) {
+        ColumnFamilyOptions.dispose();
+      }
+    }
+  }
+
+  @Test
+  public void compactionStyles() {
+    ColumnFamilyOptions ColumnFamilyOptions = null;
+    try {
+      ColumnFamilyOptions = new ColumnFamilyOptions();
+      for (CompactionStyle compactionStyle :
+          CompactionStyle.values()) {
+        ColumnFamilyOptions.setCompactionStyle(compactionStyle);
+        assertThat(ColumnFamilyOptions.compactionStyle()).
+            isEqualTo(compactionStyle);
+        assertThat(CompactionStyle.valueOf("FIFO")).
+            isEqualTo(CompactionStyle.FIFO);
+      }
+    } finally {
+      if (ColumnFamilyOptions != null) {
+        ColumnFamilyOptions.dispose();
+      }
+    }
   }
 }

java/org/rocksdb/test/ColumnFamilyTest.java

@@ -16,6 +16,8 @@ import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
 import org.rocksdb.*;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class ColumnFamilyTest {
 
   @ClassRule
@@ -26,71 +28,85 @@ public class ColumnFamilyTest {
   public TemporaryFolder dbFolder = new TemporaryFolder();
 
   @Test
-  public void  columnFamilies() {
+  public void listColumnFamilies() throws RocksDBException {
-    String db_path = dbFolder.getRoot().getAbsolutePath();
     RocksDB db = null;
-    Options options = new Options();
+    Options options = null;
+    try {
+      options = new Options();
       options.setCreateIfMissing(true);
 
       DBOptions dbOptions = new DBOptions();
       dbOptions.setCreateIfMissing(true);
 
-    try {
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath());
-        db = RocksDB.open(options, db_path);
-    } catch (RocksDBException e) {
-      assert(false);
-    }
       // Test listColumnFamilies
       List<byte[]> columnFamilyNames;
-    try {
+      columnFamilyNames = RocksDB.listColumnFamilies(options, dbFolder.getRoot().getAbsolutePath());
-      columnFamilyNames =  RocksDB.listColumnFamilies(options, db_path);
+      assertThat(columnFamilyNames).isNotNull();
-      if (columnFamilyNames != null && columnFamilyNames.size() > 0) {
+      assertThat(columnFamilyNames.size()).isGreaterThan(0);
-        assert(columnFamilyNames.size() == 1);
+      assertThat(columnFamilyNames.size()).isEqualTo(1);
-        assert(new String(columnFamilyNames.get(0)).equals("default"));
+      assertThat(new String(columnFamilyNames.get(0))).isEqualTo("default");
-      } else {
+    } finally {
-        assert(false);
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
+      }
     }
-    } catch (RocksDBException e) {
-      assert(false);
   }
 
-    // Test createColumnFamily
+  @Test
+  public void createColumnFamily() throws RocksDBException {
+    RocksDB db = null;
+    Options options = null;
     try {
+      options = new Options();
+      options.setCreateIfMissing(true);
+
+      DBOptions dbOptions = new DBOptions();
+      dbOptions.setCreateIfMissing(true);
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath());
       db.createColumnFamily(new ColumnFamilyDescriptor("new_cf",
           new ColumnFamilyOptions()));
-    } catch (RocksDBException e) {
+      db.close();
-      assert(false);
+      List<byte[]> columnFamilyNames;
-    }
+      columnFamilyNames = RocksDB.listColumnFamilies(options, dbFolder.getRoot().getAbsolutePath());
-
+      assertThat(columnFamilyNames).isNotNull();
+      assertThat(columnFamilyNames.size()).isGreaterThan(0);
+      assertThat(columnFamilyNames.size()).isEqualTo(2);
+      assertThat(new String(columnFamilyNames.get(0))).isEqualTo("default");
+      assertThat(new String(columnFamilyNames.get(1))).isEqualTo("new_cf");
+    } finally {
       if (db != null) {
         db.close();
       }
-
+      if (options != null) {
-    // Test listColumnFamilies after create "new_cf"
+        options.dispose();
-    try {
+      }
-      columnFamilyNames =  RocksDB.listColumnFamilies(options, db_path);
-      if (columnFamilyNames != null && columnFamilyNames.size() > 0) {
-        assert(columnFamilyNames.size() == 2);
-        assert(new String(columnFamilyNames.get(0)).equals("default"));
-        assert(new String(columnFamilyNames.get(1)).equals("new_cf"));
-      } else {
-        assert(false);
     }
-    } catch (RocksDBException e) {
-      assert(false);
   }
 
+  @Test
+  public void openWithColumnFamilies() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
+    try {
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      options.setCreateMissingColumnFamilies(true);
       // Test open database with column family names
       List<ColumnFamilyDescriptor> cfNames =
           new ArrayList<>();
       List<ColumnFamilyHandle> columnFamilyHandleList =
           new ArrayList<>();
-    cfNames.add(new ColumnFamilyDescriptor("default"));
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
       cfNames.add(new ColumnFamilyDescriptor("new_cf"));
 
-    try {
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
-      db = RocksDB.open(dbOptions, db_path, cfNames, columnFamilyHandleList);
+          cfNames, columnFamilyHandleList);
-      assert(columnFamilyHandleList.size() == 2);
+      assertThat(columnFamilyHandleList.size()).isEqualTo(2);
       db.put("dfkey1".getBytes(), "dfvalue".getBytes());
       db.put(columnFamilyHandleList.get(0), "dfkey2".getBytes(),
           "dfvalue".getBytes());
@@ -99,57 +115,118 @@ public class ColumnFamilyTest {
 
       String retVal = new String(db.get(columnFamilyHandleList.get(1),
           "newcfkey1".getBytes()));
-      assert(retVal.equals("newcfvalue"));
+      assertThat(retVal).isEqualTo("newcfvalue");
-      assert( (db.get(columnFamilyHandleList.get(1),
+      assertThat((db.get(columnFamilyHandleList.get(1),
-          "dfkey1".getBytes())) == null);
+          "dfkey1".getBytes()))).isNull();
       db.remove(columnFamilyHandleList.get(1), "newcfkey1".getBytes());
-      assert( (db.get(columnFamilyHandleList.get(1),
+      assertThat((db.get(columnFamilyHandleList.get(1),
-          "newcfkey1".getBytes())) == null);
+          "newcfkey1".getBytes()))).isNull();
-      db.remove("dfkey2".getBytes());
+      db.remove(columnFamilyHandleList.get(0), new WriteOptions(),
-      assert( (db.get(columnFamilyHandleList.get(0),
+          "dfkey2".getBytes());
-          "dfkey2".getBytes())) == null);
+      assertThat(db.get(columnFamilyHandleList.get(0), new ReadOptions(),
-    } catch (RocksDBException e) {
+          "dfkey2".getBytes())).isNull();
-      assert(false);
+    } finally {
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
+      }
+    }
+  }
+
+  @Test
+  public void getWithOutValueAndCf() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
+    try {
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      options.setCreateMissingColumnFamilies(true);
+      // Test open database with column family names
+      List<ColumnFamilyDescriptor> cfDescriptors =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfDescriptors.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfDescriptors, columnFamilyHandleList);
+      db.put(columnFamilyHandleList.get(0), new WriteOptions(), "key1".getBytes(), "value".getBytes());
+      db.put("key2".getBytes(), "12345678".getBytes());
+      byte[] outValue = new byte[5];
+      // not found value
+      int getResult = db.get("keyNotFound".getBytes(), outValue);
+      assertThat(getResult).isEqualTo(RocksDB.NOT_FOUND);
+      // found value which fits in outValue
+      getResult = db.get(columnFamilyHandleList.get(0), "key1".getBytes(), outValue);
+      assertThat(getResult).isNotEqualTo(RocksDB.NOT_FOUND);
+      assertThat(outValue).isEqualTo("value".getBytes());
+      // found value which fits partially
+      getResult = db.get(columnFamilyHandleList.get(0), new ReadOptions(),
+          "key2".getBytes(), outValue);
+      assertThat(getResult).isNotEqualTo(RocksDB.NOT_FOUND);
+      assertThat(outValue).isEqualTo("12345".getBytes());
+    } finally {
+      if (db != null) {
+        db.close();
+      }
+    }
   }
 
-    // Test create write to and drop ColumnFamily
+  @Test
+  public void createWriteDropColumnFamily() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions opt = null;
     ColumnFamilyHandle tmpColumnFamilyHandle = null;
     try {
+      opt = new DBOptions();
+      opt.setCreateIfMissing(true);
+      opt.setCreateMissingColumnFamilies(true);
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
       tmpColumnFamilyHandle = db.createColumnFamily(
           new ColumnFamilyDescriptor("tmpCF", new ColumnFamilyOptions()));
       db.put(tmpColumnFamilyHandle, "key".getBytes(), "value".getBytes());
       db.dropColumnFamily(tmpColumnFamilyHandle);
       tmpColumnFamilyHandle.dispose();
-    } catch (Exception e) {
+    } finally {
-      assert(false);
+      if (tmpColumnFamilyHandle != null) {
+        tmpColumnFamilyHandle.dispose();
       }
-
+      if (db != null) {
-    // Put to disposed column family tmpColumnFamilyHandle must fail
+        db.close();
-    try {
+      }
-      db.put(tmpColumnFamilyHandle, "key".getBytes(), "value".getBytes());
+      if (opt != null) {
-      assert(false);
+        opt.dispose();
-    } catch (RocksDBException e) {
-      assert(true);
       }
-
-    // Remove to disposed column family tmpColumnFamilyHandle must fail
-    try {
-      db.remove(tmpColumnFamilyHandle, "key".getBytes());
-      assert(false);
-    } catch (RocksDBException e) {
-      assert(true);
     }
-
-    // Get on a disposed column family tmpColumnFamilyHandle must fail
-    try {
-      db.get(tmpColumnFamilyHandle, "key".getBytes());
-      assert(false);
-    } catch (RocksDBException e) {
-      assert(true);
   }
 
-    // Test WriteBatch
+  @Test
+  public void writeBatch() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions opt = null;
     try {
+      opt = new DBOptions();
+      opt.setCreateIfMissing(true);
+      opt.setCreateMissingColumnFamilies(true);
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(opt, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
+
       WriteBatch writeBatch = new WriteBatch();
       WriteOptions writeOpt = new WriteOptions();
       writeBatch.put("key".getBytes(), "value".getBytes());
@@ -161,135 +238,324 @@ public class ColumnFamilyTest {
       writeBatch.remove(columnFamilyHandleList.get(1), "xyz".getBytes());
       db.write(writeOpt, writeBatch);
       writeBatch.dispose();
-      assert(db.get(columnFamilyHandleList.get(1),
+      assertThat(db.get(columnFamilyHandleList.get(1),
           "xyz".getBytes()) == null);
-      assert(new String(db.get(columnFamilyHandleList.get(1),
+      assertThat(new String(db.get(columnFamilyHandleList.get(1),
-          "newcfkey".getBytes())).equals("value"));
+          "newcfkey".getBytes()))).isEqualTo("value");
-      assert(new String(db.get(columnFamilyHandleList.get(1),
+      assertThat(new String(db.get(columnFamilyHandleList.get(1),
-          "newcfkey2".getBytes())).equals("value2"));
+          "newcfkey2".getBytes()))).isEqualTo("value2");
-      assert(new String(db.get("key".getBytes())).equals("value"));
+      assertThat(new String(db.get("key".getBytes()))).isEqualTo("value");
-    } catch (Exception e) {
+    } finally {
-      e.printStackTrace();
+      if (db != null) {
-      assert(false);
+        db.close();
+      }
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-    // Test iterator on column family
+  @Test
+  public void iteratorOnColumnFamily() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
+    RocksIterator rocksIterator = null;
     try {
-      RocksIterator rocksIterator = db.newIterator(
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      options.setCreateMissingColumnFamilies(true);
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
+      db.put(columnFamilyHandleList.get(1), "newcfkey".getBytes(),
+          "value".getBytes());
+      db.put(columnFamilyHandleList.get(1), "newcfkey2".getBytes(),
+          "value2".getBytes());
+      rocksIterator = db.newIterator(
           columnFamilyHandleList.get(1));
       rocksIterator.seekToFirst();
-      Map<String, String> refMap = new HashMap<String, String>();
+      Map<String, String> refMap = new HashMap<>();
       refMap.put("newcfkey", "value");
       refMap.put("newcfkey2", "value2");
       int i = 0;
-      while(rocksIterator.isValid()) {
+      while (rocksIterator.isValid()) {
         i++;
-        refMap.get(new String(rocksIterator.key())).equals(
+        assertThat(refMap.get(new String(rocksIterator.key()))).
-            new String(rocksIterator.value()));
+            isEqualTo(new String(rocksIterator.value()));
         rocksIterator.next();
       }
-      assert(i == 2);
+      assertThat(i).isEqualTo(2);
+      rocksIterator.dispose();
+    } finally {
+      if (rocksIterator != null) {
         rocksIterator.dispose();
-    } catch(Exception e) {
+      }
-      assert(false);
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
+      }
+    }
   }
 
-    // Test property handling on column families
+  @Test
-    try {
+  public void multiGet() throws RocksDBException {
-      assert(db.getProperty("rocksdb.estimate-num-keys") != null);
+    RocksDB db = null;
-      assert(db.getProperty("rocksdb.stats") != null);
+    DBOptions options = null;
-      assert(db.getProperty(columnFamilyHandleList.get(0),
-          "rocksdb.sstables") != null);
-      assert(db.getProperty(columnFamilyHandleList.get(1),
-          "rocksdb.estimate-num-keys") != null);
-      assert(db.getProperty(columnFamilyHandleList.get(1),
-          "rocksdb.stats") != null);
-      assert(db.getProperty(columnFamilyHandleList.get(1),
-          "rocksdb.sstables") != null);
-    } catch(Exception e) {
-      assert(false);
-    }
-
-    // MultiGet test
-    List<ColumnFamilyHandle> cfCustomList = new ArrayList<ColumnFamilyHandle>();
     try {
-      List<byte[]> keys = new ArrayList<byte[]>();
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      options.setCreateMissingColumnFamilies(true);
+      List<ColumnFamilyDescriptor> cfDescriptors =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfDescriptors.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfDescriptors.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfDescriptors, columnFamilyHandleList);
+      db.put(columnFamilyHandleList.get(0), "key".getBytes(), "value".getBytes());
+      db.put(columnFamilyHandleList.get(1), "newcfkey".getBytes(), "value".getBytes());
+
+      List<byte[]> keys = new ArrayList<>();
       keys.add("key".getBytes());
       keys.add("newcfkey".getBytes());
-      Map<byte[], byte[]> retValues = db.multiGet(columnFamilyHandleList,keys);
+      Map<byte[], byte[]> retValues = db.multiGet(columnFamilyHandleList, keys);
-      assert(retValues.size() == 2);
+      assertThat(retValues.size()).isEqualTo(2);
-      assert(new String(retValues.get(keys.get(0)))
+      assertThat(new String(retValues.get(keys.get(0))))
-          .equals("value"));
+          .isEqualTo("value");
-      assert(new String(retValues.get(keys.get(1)))
+      assertThat(new String(retValues.get(keys.get(1))))
-          .equals("value"));
+          .isEqualTo("value");
-
+      retValues = db.multiGet(new ReadOptions(), columnFamilyHandleList, keys);
-      cfCustomList.add(columnFamilyHandleList.get(0));
+      assertThat(retValues.size()).isEqualTo(2);
-      cfCustomList.add(columnFamilyHandleList.get(0));
+      assertThat(new String(retValues.get(keys.get(0))))
-      retValues = db.multiGet(cfCustomList, keys);
+          .isEqualTo("value");
-      assert(retValues.size() == 1);
+      assertThat(new String(retValues.get(keys.get(1))))
-      assert(new String(retValues.get(keys.get(0)))
+          .isEqualTo("value");
-          .equals("value"));
+    } finally {
-    } catch (RocksDBException e) {
+      if (db != null) {
-      assert(false);
+        db.close();
-    }
+      }
-
+      if (options != null) {
-    // Test multiget without correct number of column
+        options.dispose();
-    // families
+      }
+    }
+  }
+
+
+  @Test
+  public void properties() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
     try {
-      List<byte[]> keys = new ArrayList<byte[]>();
+      options = new DBOptions();
-      keys.add("key".getBytes());
+      options.setCreateIfMissing(true);
-      keys.add("newcfkey".getBytes());
+      options.setCreateMissingColumnFamilies(true);
-      cfCustomList.remove(1);
+      List<ColumnFamilyDescriptor> cfNames =
-      db.multiGet(cfCustomList, keys);
+          new ArrayList<>();
-      assert(false);
+      List<ColumnFamilyHandle> columnFamilyHandleList =
-    } catch (RocksDBException e) {
+          new ArrayList<>();
-      assert(false);
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
-    } catch (IllegalArgumentException e) {
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
-      assert(true);
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
+      assertThat(db.getProperty("rocksdb.estimate-num-keys")).
+          isNotNull();
+      assertThat(db.getProperty("rocksdb.stats")).isNotNull();
+      assertThat(db.getProperty(columnFamilyHandleList.get(0),
+          "rocksdb.sstables")).isNotNull();
+      assertThat(db.getProperty(columnFamilyHandleList.get(1),
+          "rocksdb.estimate-num-keys")).isNotNull();
+      assertThat(db.getProperty(columnFamilyHandleList.get(1),
+          "rocksdb.stats")).isNotNull();
+      assertThat(db.getProperty(columnFamilyHandleList.get(1),
+          "rocksdb.sstables")).isNotNull();
+    } finally {
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
       }
+    }
+  }
+
 
+  @Test
+  public void iterators() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
     try {
-      // iterate over default key/value pairs
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      options.setCreateMissingColumnFamilies(true);
+
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
       List<RocksIterator> iterators =
           db.newIterators(columnFamilyHandleList);
-      assert(iterators.size() == 2);
+      assertThat(iterators.size()).isEqualTo(2);
       RocksIterator iter = iterators.get(0);
       iter.seekToFirst();
-      Map<String,String> defRefMap = new HashMap<String, String>();
+      Map<String, String> defRefMap = new HashMap<>();
       defRefMap.put("dfkey1", "dfvalue");
       defRefMap.put("key", "value");
       while (iter.isValid()) {
-        defRefMap.get(new String(iter.key())).equals(
+        assertThat(defRefMap.get(new String(iter.key()))).
-            new String(iter.value()));
+            isEqualTo(new String(iter.value()));
         iter.next();
       }
       // iterate over new_cf key/value pairs
-      Map<String,String> cfRefMap = new HashMap<String, String>();
+      Map<String, String> cfRefMap = new HashMap<>();
       cfRefMap.put("newcfkey", "value");
       cfRefMap.put("newcfkey2", "value2");
       iter = iterators.get(1);
       iter.seekToFirst();
       while (iter.isValid()) {
-        cfRefMap.get(new String(iter.key())).equals(
+        assertThat(cfRefMap.get(new String(iter.key()))).
-            new String(iter.value()));
+            isEqualTo(new String(iter.value()));
         iter.next();
       }
-      // free iterators
+    } finally {
-      for (RocksIterator iterator : iterators) {
+      if (db != null) {
-        iterator.dispose();
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
+      }
     }
-      assert(true);
-    } catch (RocksDBException e) {
-      assert(false);
   }
 
-    // free cf handles before database close
+  @Test(expected = RocksDBException.class)
-    for (ColumnFamilyHandle columnFamilyHandle : columnFamilyHandleList) {
+  public void failPutDisposedCF() throws RocksDBException {
-      columnFamilyHandle.dispose();
+    RocksDB db = null;
+    DBOptions options = null;
+    try {
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
+      db.dropColumnFamily(columnFamilyHandleList.get(1));
+      db.put(columnFamilyHandleList.get(1), "key".getBytes(), "value".getBytes());
+    } finally {
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
       }
-    // close database
+    }
+  }
+
+  @Test(expected = RocksDBException.class)
+  public void failRemoveDisposedCF() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
+    try {
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
+      db.dropColumnFamily(columnFamilyHandleList.get(1));
+      db.remove(columnFamilyHandleList.get(1), "key".getBytes());
+    } finally {
+      if (db != null) {
         db.close();
-    // be sure to dispose c++ pointers
+      }
+      if (options != null) {
         options.dispose();
       }
+    }
+  }
+
+  @Test(expected = RocksDBException.class)
+  public void failGetDisposedCF() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
+    try {
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
+      db.dropColumnFamily(columnFamilyHandleList.get(1));
+      db.get(columnFamilyHandleList.get(1), "key".getBytes());
+    } finally {
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
+      }
+    }
+  }
+
+  @Test(expected = RocksDBException.class)
+  public void failMultiGetWithoutCorrectNumberOfCF() throws RocksDBException {
+    RocksDB db = null;
+    DBOptions options = null;
+    try {
+      options = new DBOptions();
+      options.setCreateIfMissing(true);
+      List<ColumnFamilyDescriptor> cfNames =
+          new ArrayList<>();
+      List<ColumnFamilyHandle> columnFamilyHandleList =
+          new ArrayList<>();
+      cfNames.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
+      cfNames.add(new ColumnFamilyDescriptor("new_cf"));
+
+      db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath(),
+          cfNames, columnFamilyHandleList);
+      List<byte[]> keys = new ArrayList<>();
+      keys.add("key".getBytes());
+      keys.add("newcfkey".getBytes());
+      List<ColumnFamilyHandle> cfCustomList = new ArrayList<>();
+      db.multiGet(cfCustomList, keys);
+
+    } finally {
+      if (db != null) {
+        db.close();
+      }
+      if (options != null) {
+        options.dispose();
+      }
+    }
+  }
+
 }

java/org/rocksdb/test/FlushTest.java

@@ -10,6 +10,8 @@ import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
 import org.rocksdb.*;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class FlushTest {
 
   @ClassRule
@@ -20,35 +22,44 @@ public class FlushTest {
   public TemporaryFolder dbFolder = new TemporaryFolder();
 
   @Test
-  public void flush() {
+  public void flush() throws RocksDBException {
     RocksDB db = null;
-    Options options = new Options();
+    Options options = null;
-    WriteOptions wOpt = new WriteOptions();
+    WriteOptions wOpt = null;
-    FlushOptions flushOptions = new FlushOptions();
+    FlushOptions flushOptions = null;
-
     try {
+      options = new Options();
       // Setup options
       options.setCreateIfMissing(true);
       options.setMaxWriteBufferNumber(10);
       options.setMinWriteBufferNumberToMerge(10);
+      wOpt = new WriteOptions();
+      flushOptions = new FlushOptions();
       flushOptions.setWaitForFlush(true);
       wOpt.setDisableWAL(true);
       db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath());
-
       db.put(wOpt, "key1".getBytes(), "value1".getBytes());
       db.put(wOpt, "key2".getBytes(), "value2".getBytes());
       db.put(wOpt, "key3".getBytes(), "value3".getBytes());
       db.put(wOpt, "key4".getBytes(), "value4".getBytes());
-      assert(db.getProperty("rocksdb.num-entries-active-mem-table").equals("4"));
+      assertThat(db.getProperty("rocksdb.num-entries-active-mem-table")).isEqualTo("4");
       db.flush(flushOptions);
-      assert(db.getProperty("rocksdb.num-entries-active-mem-table").equals("0"));
+      assertThat(db.getProperty("rocksdb.num-entries-active-mem-table")).
-    } catch (RocksDBException e) {
+          isEqualTo("0");
-      assert(false);
+    } finally {
+      if (flushOptions != null) {
+        flushOptions.dispose();
       }
-
+      if (db != null) {
         db.close();
+      }
+      if (options != null) {
         options.dispose();
+      }
+      if (wOpt != null) {
         wOpt.dispose();
-    flushOptions.dispose();
+      }
+
+    }
   }
 }

java/org/rocksdb/test/KeyMayExistTest.java

@@ -34,7 +34,7 @@ public class KeyMayExistTest {
           .setCreateMissingColumnFamilies(true);
       // open database using cf names
       List<ColumnFamilyDescriptor> cfDescriptors =
-          new ArrayList<ColumnFamilyDescriptor>();
+          new ArrayList<>();
       List<ColumnFamilyHandle> columnFamilyHandleList =
           new ArrayList<>();
       cfDescriptors.add(new ColumnFamilyDescriptor("default"));

java/org/rocksdb/test/MergeTest.java

@@ -177,11 +177,12 @@ public class MergeTest {
 
       // Test also with createColumnFamily
       columnFamilyHandle = db.createColumnFamily(
-          new ColumnFamilyDescriptor("new_cf2"));
+          new ColumnFamilyDescriptor("new_cf2",
+              new ColumnFamilyOptions().setMergeOperator(stringAppendOperator)));
       // writing xx under cfkey2
       db.put(columnFamilyHandle, "cfkey2".getBytes(), "xx".getBytes());
       // merge yy under cfkey2
-      db.merge(columnFamilyHandle, "cfkey2".getBytes(), "yy".getBytes());
+      db.merge(columnFamilyHandle, new WriteOptions(), "cfkey2".getBytes(), "yy".getBytes());
       value = db.get(columnFamilyHandle, "cfkey2".getBytes());
       String strValueTmpCf = new String(value);
 

java/org/rocksdb/test/MixedOptionsTest.java

@@ -5,26 +5,33 @@
 
 package org.rocksdb.test;
 
+import org.junit.ClassRule;
+import org.junit.Test;
 import org.rocksdb.*;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class MixedOptionsTest {
-  static {
+
-    RocksDB.loadLibrary();
+  @ClassRule
-  }
+  public static final RocksMemoryResource rocksMemoryResource =
-  public static void main(String[] args) {
+      new RocksMemoryResource();
+
+  @Test
+  public void mixedOptionsTest(){
     // Set a table factory and check the names
     ColumnFamilyOptions cfOptions = new ColumnFamilyOptions();
     cfOptions.setTableFormatConfig(new BlockBasedTableConfig().
         setFilter(new BloomFilter()));
-    assert(cfOptions.tableFactoryName().equals(
+    assertThat(cfOptions.tableFactoryName()).isEqualTo(
-        "BlockBasedTable"));
+        "BlockBasedTable");
     cfOptions.setTableFormatConfig(new PlainTableConfig());
-    assert(cfOptions.tableFactoryName().equals("PlainTable"));
+    assertThat(cfOptions.tableFactoryName()).isEqualTo("PlainTable");
     // Initialize a dbOptions object from cf options and
     // db options
     DBOptions dbOptions = new DBOptions();
     Options options = new Options(dbOptions, cfOptions);
-    assert(options.tableFactoryName().equals("PlainTable"));
+    assertThat(options.tableFactoryName()).isEqualTo("PlainTable");
     // Free instances
     options.dispose();
     options = null;

java/org/rocksdb/test/OptionsTest.java

@@ -23,196 +23,463 @@ public class OptionsTest {
       getPlatformSpecificRandomFactory();
 
   @Test
-  public void options() throws RocksDBException {
+  public void writeBufferSize() throws RocksDBException {
     Options opt = null;
     try {
       opt = new Options();
-
-      { // WriteBufferSize test
       long longValue = rand.nextLong();
       opt.setWriteBufferSize(longValue);
-        assert (opt.writeBufferSize() == longValue);
+      assertThat(opt.writeBufferSize()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MaxWriteBufferNumber test
+  @Test
+  public void maxWriteBufferNumber() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setMaxWriteBufferNumber(intValue);
-        assert (opt.maxWriteBufferNumber() == intValue);
+      assertThat(opt.maxWriteBufferNumber()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MinWriteBufferNumberToMerge test
+  @Test
+  public void minWriteBufferNumberToMerge() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setMinWriteBufferNumberToMerge(intValue);
-        assert (opt.minWriteBufferNumberToMerge() == intValue);
+      assertThat(opt.minWriteBufferNumberToMerge()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // NumLevels test
+  @Test
+  public void numLevels() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setNumLevels(intValue);
-        assert (opt.numLevels() == intValue);
+      assertThat(opt.numLevels()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // LevelFileNumCompactionTrigger test
+  @Test
+  public void levelZeroFileNumCompactionTrigger() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setLevelZeroFileNumCompactionTrigger(intValue);
-        assert (opt.levelZeroFileNumCompactionTrigger() == intValue);
+      assertThat(opt.levelZeroFileNumCompactionTrigger()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // LevelSlowdownWritesTrigger test
+  @Test
+  public void levelZeroSlowdownWritesTrigger() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setLevelZeroSlowdownWritesTrigger(intValue);
-        assert (opt.levelZeroSlowdownWritesTrigger() == intValue);
+      assertThat(opt.levelZeroSlowdownWritesTrigger()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // LevelStopWritesTrigger test
+  @Test
+  public void levelZeroStopWritesTrigger() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setLevelZeroStopWritesTrigger(intValue);
-        assert (opt.levelZeroStopWritesTrigger() == intValue);
+      assertThat(opt.levelZeroStopWritesTrigger()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MaxMemCompactionLevel test
+  @Test
+  public void maxMemCompactionLevel() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setMaxMemCompactionLevel(intValue);
-        assert (opt.maxMemCompactionLevel() == intValue);
+      assertThat(opt.maxMemCompactionLevel()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // TargetFileSizeBase test
+  @Test
+  public void targetFileSizeBase() {
+    Options opt = null;
+    try {
+      opt = new Options();
       long longValue = rand.nextLong();
       opt.setTargetFileSizeBase(longValue);
-        assert (opt.targetFileSizeBase() == longValue);
+      assertThat(opt.targetFileSizeBase()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // TargetFileSizeMultiplier test
+  @Test
+  public void targetFileSizeMultiplier() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setTargetFileSizeMultiplier(intValue);
-        assert (opt.targetFileSizeMultiplier() == intValue);
+      assertThat(opt.targetFileSizeMultiplier()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MaxBytesForLevelBase test
+  @Test
+  public void maxBytesForLevelBase() {
+    Options opt = null;
+    try {
+      opt = new Options();
       long longValue = rand.nextLong();
       opt.setMaxBytesForLevelBase(longValue);
-        assert (opt.maxBytesForLevelBase() == longValue);
+      assertThat(opt.maxBytesForLevelBase()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MaxBytesForLevelMultiplier test
+  @Test
+  public void maxBytesForLevelMultiplier() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setMaxBytesForLevelMultiplier(intValue);
-        assert (opt.maxBytesForLevelMultiplier() == intValue);
+      assertThat(opt.maxBytesForLevelMultiplier()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // ExpandedCompactionFactor test
+  @Test
+  public void expandedCompactionFactor() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setExpandedCompactionFactor(intValue);
-        assert (opt.expandedCompactionFactor() == intValue);
+      assertThat(opt.expandedCompactionFactor()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // SourceCompactionFactor test
+  @Test
+  public void sourceCompactionFactor() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setSourceCompactionFactor(intValue);
-        assert (opt.sourceCompactionFactor() == intValue);
+      assertThat(opt.sourceCompactionFactor()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MaxGrandparentOverlapFactor test
+  @Test
+  public void maxGrandparentOverlapFactor() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setMaxGrandparentOverlapFactor(intValue);
-        assert (opt.maxGrandparentOverlapFactor() == intValue);
+      assertThat(opt.maxGrandparentOverlapFactor()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // SoftRateLimit test
+  @Test
+  public void softRateLimit() {
+    Options opt = null;
+    try {
+      opt = new Options();
       double doubleValue = rand.nextDouble();
       opt.setSoftRateLimit(doubleValue);
-        assert (opt.softRateLimit() == doubleValue);
+      assertThat(opt.softRateLimit()).isEqualTo(doubleValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // HardRateLimit test
+  @Test
+  public void hardRateLimit() {
+    Options opt = null;
+    try {
+      opt = new Options();
       double doubleValue = rand.nextDouble();
       opt.setHardRateLimit(doubleValue);
-        assert (opt.hardRateLimit() == doubleValue);
+      assertThat(opt.hardRateLimit()).isEqualTo(doubleValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // RateLimitDelayMaxMilliseconds test
+  @Test
+  public void rateLimitDelayMaxMilliseconds() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setRateLimitDelayMaxMilliseconds(intValue);
-        assert (opt.rateLimitDelayMaxMilliseconds() == intValue);
+      assertThat(opt.rateLimitDelayMaxMilliseconds()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // ArenaBlockSize test
+  @Test
+  public void arenaBlockSize() throws RocksDBException {
+    Options opt = null;
+    try {
+      opt = new Options();
       long longValue = rand.nextLong();
       opt.setArenaBlockSize(longValue);
-        assert (opt.arenaBlockSize() == longValue);
+      assertThat(opt.arenaBlockSize()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // DisableAutoCompactions test
+  @Test
+  public void disableAutoCompactions() {
+    Options opt = null;
+    try {
+      opt = new Options();
       boolean boolValue = rand.nextBoolean();
       opt.setDisableAutoCompactions(boolValue);
-        assert (opt.disableAutoCompactions() == boolValue);
+      assertThat(opt.disableAutoCompactions()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // PurgeRedundantKvsWhileFlush test
+  @Test
+  public void purgeRedundantKvsWhileFlush() {
+    Options opt = null;
+    try {
+      opt = new Options();
       boolean boolValue = rand.nextBoolean();
       opt.setPurgeRedundantKvsWhileFlush(boolValue);
-        assert (opt.purgeRedundantKvsWhileFlush() == boolValue);
+      assertThat(opt.purgeRedundantKvsWhileFlush()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // VerifyChecksumsInCompaction test
+  @Test
+  public void verifyChecksumsInCompaction() {
+    Options opt = null;
+    try {
+      opt = new Options();
       boolean boolValue = rand.nextBoolean();
       opt.setVerifyChecksumsInCompaction(boolValue);
-        assert (opt.verifyChecksumsInCompaction() == boolValue);
+      assertThat(opt.verifyChecksumsInCompaction()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // FilterDeletes test
+  @Test
+  public void filterDeletes() {
+    Options opt = null;
+    try {
+      opt = new Options();
       boolean boolValue = rand.nextBoolean();
       opt.setFilterDeletes(boolValue);
-        assert (opt.filterDeletes() == boolValue);
+      assertThat(opt.filterDeletes()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MaxSequentialSkipInIterations test
+  @Test
+  public void maxSequentialSkipInIterations() {
+    Options opt = null;
+    try {
+      opt = new Options();
       long longValue = rand.nextLong();
       opt.setMaxSequentialSkipInIterations(longValue);
-        assert (opt.maxSequentialSkipInIterations() == longValue);
+      assertThat(opt.maxSequentialSkipInIterations()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // InplaceUpdateSupport test
+  @Test
+  public void inplaceUpdateSupport() {
+    Options opt = null;
+    try {
+      opt = new Options();
       boolean boolValue = rand.nextBoolean();
       opt.setInplaceUpdateSupport(boolValue);
-        assert (opt.inplaceUpdateSupport() == boolValue);
+      assertThat(opt.inplaceUpdateSupport()).isEqualTo(boolValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // InplaceUpdateNumLocks test
+  @Test
+  public void inplaceUpdateNumLocks() throws RocksDBException {
+    Options opt = null;
+    try {
+      opt = new Options();
       long longValue = rand.nextLong();
       opt.setInplaceUpdateNumLocks(longValue);
-        assert (opt.inplaceUpdateNumLocks() == longValue);
+      assertThat(opt.inplaceUpdateNumLocks()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MemtablePrefixBloomBits test
+  @Test
+  public void memtablePrefixBloomBits() {
+    Options opt = null;
+    try {
+      opt = new Options();
       int intValue = rand.nextInt();
       opt.setMemtablePrefixBloomBits(intValue);
-        assert (opt.memtablePrefixBloomBits() == intValue);
+      assertThat(opt.memtablePrefixBloomBits()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MemtablePrefixBloomProbes test
+  @Test
+  public void memtablePrefixBloomProbes() {
+    Options opt = null;
+    try {
       int intValue = rand.nextInt();
+      opt = new Options();
       opt.setMemtablePrefixBloomProbes(intValue);
-        assert (opt.memtablePrefixBloomProbes() == intValue);
+      assertThat(opt.memtablePrefixBloomProbes()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // BloomLocality test
+  @Test
+  public void bloomLocality() {
+    Options opt = null;
+    try {
       int intValue = rand.nextInt();
+      opt = new Options();
       opt.setBloomLocality(intValue);
-        assert (opt.bloomLocality() == intValue);
+      assertThat(opt.bloomLocality()).isEqualTo(intValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MaxSuccessiveMerges test
+  @Test
+  public void maxSuccessiveMerges() throws RocksDBException {
+    Options opt = null;
+    try {
       long longValue = rand.nextLong();
+      opt = new Options();
       opt.setMaxSuccessiveMerges(longValue);
-        assert (opt.maxSuccessiveMerges() == longValue);
+      assertThat(opt.maxSuccessiveMerges()).isEqualTo(longValue);
+    } finally {
+      if (opt != null) {
+        opt.dispose();
+      }
+    }
   }
 
-      { // MinPartialMergeOperands test
+  @Test
+  public void minPartialMergeOperands() {
+    Options opt = null;
+    try {
       int intValue = rand.nextInt();
+      opt = new Options();
       opt.setMinPartialMergeOperands(intValue);
-        assert (opt.minPartialMergeOperands() == intValue);
+      assertThat(opt.minPartialMergeOperands()).isEqualTo(intValue);
-      }
     } finally {
       if (opt != null) {
         opt.dispose();

java/org/rocksdb/test/WriteBatchHandlerTest.java

@@ -75,10 +75,10 @@ public class WriteBatchHandlerTest {
 
         // compare the results to the test data
         final List<Tuple<Action, Tuple<byte[], byte[]>>> actualEvents = handler.getEvents();
-        assert(testEvents.size() == actualEvents.size());
+        assertThat(testEvents.size()).isSameAs(actualEvents.size());
 
         for(int i = 0; i < testEvents.size(); i++) {
-            assert(equals(testEvents.get(i), actualEvents.get(i)));
+            assertThat(equals(testEvents.get(i), actualEvents.get(i))).isTrue();
         }
 
         System.out.println("Passed WriteBatchHandler Test");