diff --git a/.gitignore b/.gitignore
index 789c91d..fc1e3bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,6 @@ target
 *.iws
 *.log
 .idea
+
+*.conf
+*.PNG
diff --git a/pom.xml b/pom.xml
index 1297337..cfe3f56 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,12 +17,27 @@
     <jdk.version>1.6</jdk.version>
   </properties>
 
+
+  <dependencies>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-log4j12</artifactId>
+      <version>1.7.26</version>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.12</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
   <build>
     <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.5.1</version>
+        <!--<version>3.5.1</version>-->
         <configuration>
           <encoding>UTF-8</encoding>
           <source>${jdk.version}</source>
diff --git a/src/main/java/org/csource/fastdfs/StorageClient.java b/src/main/java/org/csource/fastdfs/StorageClient.java
index dec5b1b..9d5c3fa 100644
--- a/src/main/java/org/csource/fastdfs/StorageClient.java
+++ b/src/main/java/org/csource/fastdfs/StorageClient.java
@@ -28,6 +28,8 @@ public class StorageClient {
   protected StorageServer storageServer;
   protected byte errno;
 
+
+
   /**
    * constructor using global settings in class ClientGlobal
    */
@@ -1748,6 +1750,34 @@ public class StorageClient {
     this.storageServer.getSocket().getOutputStream().write(wholePkg);
   }
 
+  public boolean isConnected(){
+    return trackerServer.isConnected();
+  }
+
+  public boolean isAvaliable(){
+    return trackerServer.isAvaliable();
+  }
+
+  public void close() throws IOException {
+    trackerServer.close();
+  }
+
+  public TrackerServer getTrackerServer() {
+    return trackerServer;
+  }
+
+  public void setTrackerServer(TrackerServer trackerServer) {
+    this.trackerServer = trackerServer;
+  }
+
+  public StorageServer getStorageServer() {
+    return storageServer;
+  }
+
+  public void setStorageServer(StorageServer storageServer) {
+    this.storageServer = storageServer;
+  }
+
   /**
    * Upload file by file buff
    *
diff --git a/src/main/java/org/csource/fastdfs/TrackerServer.java b/src/main/java/org/csource/fastdfs/TrackerServer.java
index dffdb33..4b7dfd3 100644
--- a/src/main/java/org/csource/fastdfs/TrackerServer.java
+++ b/src/main/java/org/csource/fastdfs/TrackerServer.java
@@ -78,4 +78,36 @@ public class TrackerServer {
   protected void finalize() throws Throwable {
     this.close();
   }
+
+  public boolean isConnected(){
+    boolean isConnected = false;
+    if (sock != null){
+      if (sock.isConnected()){
+        isConnected = true;
+      }
+    }
+    return isConnected;
+  }
+
+  public boolean isAvaliable(){
+    if(isConnected()){
+      if(sock.getPort() == 0){
+        return false;
+      }
+      if(sock.getInetAddress() == null){
+        return false;
+      }
+      if(sock.getRemoteSocketAddress() == null){
+        return false;
+      }
+      if(sock.isInputShutdown()){
+        return false;
+      }
+      if(sock.isOutputShutdown()){
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
 }
diff --git a/src/test/java/org/csource/fastdfs/FdfsTest.java b/src/test/java/org/csource/fastdfs/FdfsTest.java
new file mode 100644
index 0000000..2893114
--- /dev/null
+++ b/src/test/java/org/csource/fastdfs/FdfsTest.java
@@ -0,0 +1,119 @@
+package org.csource.fastdfs;
+
+import org.csource.common.NameValuePair;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.*;
+import java.util.Arrays;
+
+/**
+ * @author chengdu
+ * @date 2019/7/13.
+ */
+public class FdfsTest {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(FdfsTest.class);
+
+    private static final String CONF_NAME = "fdfstest.conf";
+
+    private StorageClient storageClient;
+
+    private TrackerServer trackerServer;
+
+    @Before
+    public void initStorageClient() throws Exception {
+        ClientGlobal.init(CONF_NAME);
+        LOGGER.info("network_timeout=" + ClientGlobal.g_network_timeout + "ms");
+        LOGGER.info("charset=" + ClientGlobal.g_charset);
+        TrackerClient tracker = new TrackerClient();
+        trackerServer = tracker.getConnection();
+        StorageServer storageServer = null;
+        storageClient = new StorageClient(trackerServer, storageServer);
+    }
+
+    @After
+    public void closeClient() {
+        LOGGER.info("close connection");
+        if(storageClient != null){
+            try {
+               storageClient.close();
+            }catch (Exception e){
+                e.printStackTrace();
+            }catch (Throwable e){
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public void writeByteToFile(byte[] fbyte, String fileName) throws IOException {
+        BufferedOutputStream bos = null;
+        FileOutputStream fos = null;
+        File file = new File(fileName);
+        try {
+            fos = new FileOutputStream(file);
+            bos = new BufferedOutputStream(fos);
+            bos.write(fbyte);
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            if (bos != null) {
+                bos.close();
+            }
+            if (fos != null) {
+                fos.close();
+            }
+        }
+    }
+
+    @Test
+    public void upload() throws Exception{
+        NameValuePair[] metaList = new NameValuePair[1];
+        String local_filename = "build.PNG";
+        metaList[0] = new NameValuePair("fileName", local_filename);
+        File file = new File("C:/Users/chengdu/Desktop/build.PNG");
+        InputStream inputStream = new FileInputStream(file);
+        int length = inputStream.available();
+        byte[] bytes = new byte[length];
+        inputStream.read(bytes);
+        String[] result = storageClient.upload_file(bytes, null, metaList);
+        LOGGER.info("result {}", Arrays.asList(result));
+        Assert.assertEquals(2, result.length);
+    }
+
+    @Test
+    public void download() throws Exception {
+        String[] uploadresult = {"group1", "M00/00/00/wKgBZV0phl2ASV1nAACk1tFxwrM3814331"};
+        byte[] result = storageClient.download_file(uploadresult[0], uploadresult[1]);
+        String local_filename = "build.PNG";
+        writeByteToFile(result, local_filename);
+        File file = new File(local_filename);
+        Assert.assertTrue(file.isFile());
+    }
+
+    @Test
+    public void testUploadDownload() throws Exception {
+        NameValuePair[] metaList = new NameValuePair[1];
+        String local_filename = "build.PNG";
+        metaList[0] = new NameValuePair("fileName", local_filename);
+        File file = new File("C:/Users/chengdu/Desktop/build.PNG");
+        InputStream inputStream = new FileInputStream(file);
+        int length = inputStream.available();
+        byte[] bytes = new byte[length];
+        inputStream.read(bytes);
+        String[] result = storageClient.upload_file(bytes, null, metaList);
+        Assert.assertTrue(storageClient.isConnected());
+        // pool testOnborrow  isAvaliable
+        Assert.assertTrue(storageClient.isAvaliable());
+        LOGGER.info("result {}", Arrays.asList(result));
+        byte[] resultbytes = storageClient.download_file(result[0], result[1]);
+        writeByteToFile(resultbytes, local_filename);
+        File downfile = new File(local_filename);
+        Assert.assertTrue(downfile.isFile());
+    }
+
+}
diff --git a/src/test/resources/log4j.properties b/src/test/resources/log4j.properties
new file mode 100644
index 0000000..dbcafc8
--- /dev/null
+++ b/src/test/resources/log4j.properties
@@ -0,0 +1,12 @@
+log4j.rootLogger=INFO, Console ,File 
+
+#Console
+log4j.appender.Console=org.apache.log4j.ConsoleAppender 
+log4j.appender.Console.layout=org.apache.log4j.PatternLayout 
+log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
+
+#File
+log4j.appender.File = org.apache.log4j.FileAppender
+log4j.appender.File.File = log4j2.log
+log4j.appender.File.layout = org.apache.log4j.PatternLayout
+log4j.appender.File.layout.ConversionPattern =%d [%t] %-5p [%c] - %m%n
\ No newline at end of file