add DruidStatNullDataTest testcase

src/test/java/com/alibaba/druid/bvt/console/DruidStatNullDataTest.java

@@ -0,0 +1,61 @@
+package com.alibaba.druid.bvt.console;
+
+import org.junit.runner.notification.Failure;
+import org.junit.runner.JUnitCore;
+import org.junit.runner.Result;
+import com.alibaba.druid.support.console.DruidStat;
+import com.alibaba.druid.util.JdbcUtils;
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.support.console.Option;
+import junit.framework.TestCase;
+import java.lang.management.ManagementFactory;
+
+public class DruidStatNullDataTest extends TestCase {
+
+    private DruidDataSource dataSource;
+
+    private static String getSelfPid() {
+        String pid = ManagementFactory.getRuntimeMXBean().getName().split("@")[0];
+        return pid;
+    }
+
+	protected void createDs() throws Exception {
+        dataSource = new DruidDataSource();
+        dataSource.setMinIdle(1);
+        dataSource.setUrl("jdbc:h2:mem:test;");
+        dataSource.setTestOnBorrow(false);
+        dataSource.setFilters("stat");
+        dataSource.setRemoveAbandoned(true);
+        dataSource.setRemoveAbandonedTimeout(600);
+		//do not execute any sql, just init the datasource.
+		dataSource.init();
+		
+	}
+
+	protected void dispose() throws Exception {
+        JdbcUtils.close(dataSource);
+    }
+
+	public void test_printDruidStat() throws Exception {
+		createDs();
+        String pid = getSelfPid();
+        String[] cmdArray = {"-sql", pid};
+        Option opt = Option.parseOptions(cmdArray);
+        DruidStat.printDruidStat(opt);
+
+		cmdArray = new String[] {"-act", pid};
+        opt = Option.parseOptions(cmdArray);
+        DruidStat.printDruidStat(opt);
+		dispose();
+	}
+
+    public static void main(String[] args) {
+		Result result = JUnitCore.runClasses(DruidStatNullDataTest.class);
+		for (Failure failure : result.getFailures()) {
+			System.out.println(failure.toString());
+		}
+	}
+
+	
+	
+}