[RocksJava] Extended Testcases

java/org/rocksdb/test/EnvironmentTest.java

+package org.rocksdb.test;
+
+import org.junit.Test;
+import org.rocksdb.util.Environment;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class EnvironmentTest {
+
+  // Init static context
+  private static Environment environment =
+      new Environment();
+
+  @Test
+  public void mac32() {
+    setEnvironmentClassFields("mac", "32");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".jnilib");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-osx.jnilib");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.dylib");
+  }
+
+  @Test
+  public void mac64() {
+    setEnvironmentClassFields("mac", "64");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".jnilib");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-osx.jnilib");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.dylib");
+  }
+
+  @Test
+  public void nix32() {
+    // Linux
+    setEnvironmentClassFields("Linux", "32");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".so");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-linux32.so");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.so");
+    // UNIX
+    setEnvironmentClassFields("Unix", "32");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".so");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-linux32.so");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.so");
+    // AIX
+    setEnvironmentClassFields("aix", "32");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".so");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-linux32.so");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.so");
+  }
+
+  @Test
+  public void nix64() {
+    setEnvironmentClassFields("Linux", "x64");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".so");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-linux64.so");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.so");
+    // UNIX
+    setEnvironmentClassFields("Unix", "x64");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".so");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-linux64.so");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.so");
+    // AIX
+    setEnvironmentClassFields("aix", "x64");
+    assertThat(Environment.getJniLibraryExtension()).
+        isEqualTo(".so");
+    assertThat(Environment.getJniLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni-linux64.so");
+    assertThat(Environment.getSharedLibraryName("rocksdb")).
+        isEqualTo("librocksdbjni.so");
+  }
+
+  @Test(expected = UnsupportedOperationException.class)
+  public void failLinuxJniLibraryName(){
+    setEnvironmentClassFields("win", "x64");
+    Environment.getJniLibraryName("rocksdb");
+  }
+
+  @Test(expected = UnsupportedOperationException.class)
+  public void failWinSharedLibrary(){
+    setEnvironmentClassFields("win", "x64");
+    Environment.getSharedLibraryName("rocksdb");
+  }
+
+  private void setEnvironmentClassFields(String osName,
+      String osArch) {
+    setEnvironmentClassField("OS", osName);
+    setEnvironmentClassField("ARCH", osArch);
+  }
+
+  private void setEnvironmentClassField(String fieldName, String value) {
+    final Field field;
+    try {
+      field = Environment.class.getDeclaredField(fieldName);
+      field.setAccessible(true);
+      final Field modifiersField = Field.class.getDeclaredField("modifiers");
+      modifiersField.setAccessible(true);
+      modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+      field.set(null, value);
+    } catch (NoSuchFieldException | IllegalAccessException e) {
+      throw new RuntimeException(e);
+    }
+  }
+}

java/org/rocksdb/test/RocksIteratorTest.java

@@ -13,6 +13,8 @@ import org.rocksdb.RocksDB;
 import org.rocksdb.RocksDBException;
 import org.rocksdb.RocksIterator;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class RocksIteratorTest {
 
   @ClassRule
@@ -22,6 +24,42 @@ public class RocksIteratorTest {
   @Rule
   public TemporaryFolder dbFolder = new TemporaryFolder();
 
+  @Test
+  public void rocksIterator() throws RocksDBException {
+    RocksDB db;
+    Options options = new Options();
+    options.setCreateIfMissing(true)
+        .setCreateMissingColumnFamilies(true);
+    db = RocksDB.open(options,
+        dbFolder.getRoot().getAbsolutePath());
+    db.put("key1".getBytes(), "value1".getBytes());
+    db.put("key2".getBytes(), "value2".getBytes());
+
+    RocksIterator iterator = db.newIterator();
+
+    iterator.seekToFirst();
+    assertThat(iterator.isValid()).isTrue();
+    assertThat(iterator.key()).isEqualTo("key1".getBytes());
+    assertThat(iterator.value()).isEqualTo("value1".getBytes());
+    iterator.next();
+    assertThat(iterator.isValid()).isTrue();
+    assertThat(iterator.key()).isEqualTo("key2".getBytes());
+    assertThat(iterator.value()).isEqualTo("value2".getBytes());
+    iterator.next();
+    assertThat(iterator.isValid()).isFalse();
+    iterator.seekToLast();
+    iterator.prev();
+    assertThat(iterator.isValid()).isTrue();
+    assertThat(iterator.key()).isEqualTo("key1".getBytes());
+    assertThat(iterator.value()).isEqualTo("value1".getBytes());
+    iterator.seekToFirst();
+    iterator.seekToLast();
+    assertThat(iterator.isValid()).isTrue();
+    assertThat(iterator.key()).isEqualTo("key2".getBytes());
+    assertThat(iterator.value()).isEqualTo("value2".getBytes());
+    iterator.status();
+  }
+
   @Test
   public void rocksIteratorGc()
       throws RocksDBException {