import java.io.*;

import org.lmdbjava.*;
import org.testng.Assert;
import org.testng.annotations.Test;

public class FooTest {

    @Test
    public void testFoo() throws Exception {

        // Create new empty directory
        File dir = File.createTempFile("foo.", null);
        Assert.assertTrue(dir.delete());
        Assert.assertTrue(dir.mkdirs());
        dir.deleteOnExit();

        // Create new environment
        Env.Builder<byte[]> builder = Env.create(ByteArrayProxy.PROXY_BA);
        Env<byte[]> env = builder.open(dir);

        // Open database
        Dbi<byte[]> db = env.openDbi("foo", DbiFlags.MDB_CREATE);

        // Open transaction
        Txn<byte[]> tx = env.txnWrite();

        // Put key/value pair
        db.put(tx, new byte[] { 1 }, new byte[] { 2 });

        // Iterate range backwards - we should encounter the key/value pair we just put
        try (CursorIterator<byte[]> i = db.iterate(tx, KeyRange.greaterThanBackward(new byte[] { 3 }))) {
            Assert.assertTrue(i.hasNext());      // TEST FAILS HERE
            CursorIterator.KeyVal<byte[]> kv = i.next();
            Assert.assertEquals(kv.key(), new byte[] { 1 });
            Assert.assertEquals(kv.val(), new byte[] { 2 });
            Assert.assertFalse(i.hasNext());
        }

        // Commit transaction
        tx.commit();

        // Close environment
        env.close();
    }
}