diff -r f1112f777ce9 -r 96906a986c3b testdev/ite/test/com.nokia.testfw.launch.test/src/com/nokia/testfw/launch/monitor/TailFileInputStreamTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testdev/ite/test/com.nokia.testfw.launch.test/src/com/nokia/testfw/launch/monitor/TailFileInputStreamTest.java	Tue Mar 30 14:39:29 2010 +0800
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). 
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of the License "Symbian Foundation License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description:
+ *
+ */
+package com.nokia.testfw.launch.monitor;
+
+import junit.framework.TestCase;
+
+/**
+ * @author xiaoma
+ * 
+ */
+public class TailFileInputStreamTest extends TestCase {
+
+	private static final String TESTFILE = "tailstream.test";
+
+	// private File testFile;
+
+	// during setup, we will start a thread to write to disk file
+	protected void setUp() throws Exception {
+		// testFile = new File(TESTFILE);
+		LogFileWriter logWriter;
+		// write log every second in separate thread, last for 10 seconds
+		logWriter = new LogFileWriter(TESTFILE, 10);
+		Thread writerThread = new Thread(logWriter);
+		writerThread.start();
+	}
+
+	protected void tearDown() throws Exception {
+		// testFile.delete();
+	}
+
+	public void testTailFile() {
+		// use tail stream to read the file while other app is writing.
+		TailFileInputStream tis;
+		boolean finished = false;
+		StringBuffer sb = new StringBuffer();
+		try {
+			tis = new TailFileInputStream(TESTFILE);
+			byte[] bytes = new byte[10];
+			System.out.println("begin to read log file");
+			while (!finished) {
+				if (tis.available() > 0) {
+					int count = 0;
+					while ((count = tis.read(bytes)) != -1) {
+						String line = new String(bytes, 0, count).trim();
+						System.out.println("read log :" + line);
+						sb.append(line);
+						if (line.equalsIgnoreCase("test10")) {
+							finished = true;
+							break;
+						}
+					}
+					Thread.sleep(100);
+				}
+			}
+			tis.close();
+		} catch (Exception e) {
+			e.printStackTrace();
+			fail(e.toString());
+		}
+
+		String content = sb.toString();
+		System.out.println("log file content:" + content);
+		assertTrue(content.indexOf("oldtest") < 0);
+		assertTrue(content.indexOf("test4") > 0);
+		assertTrue(content.indexOf("test9") > 0);
+	}
+
+}