--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/shoshi/jungle/core/App.java	Tue Feb 05 18:19:11 2013 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/shoshi/jungle/core/App.java	Tue Feb 05 19:16:45 2013 +0900
@@ -20,6 +20,7 @@
     	jungle.createNewTree("hoge");
     	JungleTree tree = jungle.getTreeByName("hoge");
     	JungleTreeEditor editor = tree.getTreeEditor();
+    	JungleTreeEditor editor2 = tree.getTreeEditor();
     	DefaultNodePath path = new DefaultNodePath();
     	
     	String key = "key";
@@ -29,6 +30,7 @@
     	JungleTreeEditor e = either.b();
     	e.success();
     	
+    	
     	Node root = tree.getRootNode();
     	ByteBuffer v = root.getAttributes().get(key);
     	String str = new String(v.array());

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/test/java/DefaultJungleTreeTest.java	Tue Feb 05 19:16:45 2013 +0900
@@ -0,0 +1,63 @@
+import java.nio.ByteBuffer;
+
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.DefaultJungle;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.Jungle;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTree;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTreeEditor;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultNodePath;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.traverser.Result;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+
+public class DefaultJungleTreeTest extends TestCase
+{
+	public Jungle instance()
+	{
+		Jungle j = new DefaultJungle("hogehoge");
+		return j;
+	}
+	
+	public static final String key = "KEY";
+	public static final ByteBuffer value = ByteBuffer.wrap(key.getBytes());
+	
+	public void testSampleTest()
+	{
+		Jungle j = instance();
+		j.createNewTree("tree");
+		JungleTree tree = j.getTreeByName("tree");
+		
+		JungleTreeEditor editor1 = tree.getTreeEditor();
+		JungleTreeEditor editor2 = tree.getTreeEditor();
+		
+		DefaultNodePath root = new DefaultNodePath();
+		
+		Either<Error,JungleTreeEditor> either = editor1.putAttribute(root,key,value);
+		if(either.isA()){
+			Assert.fail();
+		}
+		editor1 = either.b();
+		editor1.success();
+		
+		// check the value ;
+		Node node = tree.getRootNode();
+		ByteBuffer v = node.getAttributes().get(key);
+		Assert.assertEquals(0,v.compareTo(value));
+		
+		// editor2 must fail transction
+		either = editor2.putAttribute(root,key,value);
+		if(either.isA()){
+			Assert.fail();
+		}
+		editor2 = either.b();
+		Either<Error,JungleTreeEditor> r = editor2.success();
+		Assert.assertTrue(either.isA());
+	}
+	
+	public void testIsolation()
+	{
+		
+	}
+}