Merge pull request #181 from wenshao/master

add testcase

src/test/java/com/alibaba/druid/bvt/pool/LockFairTest.java

@@ -0,0 +1,61 @@
+package com.alibaba.druid.bvt.pool;
+
+import java.sql.Connection;
+import java.util.concurrent.locks.ReentrantLock;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.util.JdbcUtils;
+
+public class LockFairTest extends TestCase {
+
+    private DruidDataSource dataSource;
+
+    protected void setUp() throws Exception {
+        dataSource = new DruidDataSource();
+        dataSource.setUrl("jdbc:mock:xx");
+    }
+
+    protected void tearDown() throws Exception {
+        JdbcUtils.close(dataSource);
+    }
+
+    public void test_fair() throws Exception {
+        Assert.assertEquals(false, ((ReentrantLock) dataSource.getLock()).isFair());
+        dataSource.setMaxWait(100);
+
+        Assert.assertEquals(true, ((ReentrantLock) dataSource.getLock()).isFair());
+        {
+            Connection conn = dataSource.getConnection();
+            conn.close();
+        }
+        dataSource.setMaxWait(110);
+
+        Assert.assertEquals(true, ((ReentrantLock) dataSource.getLock()).isFair());
+        {
+            Connection conn = dataSource.getConnection();
+            conn.close();
+        }
+        
+        dataSource.setMaxWait(0);
+
+        Assert.assertEquals(true, ((ReentrantLock) dataSource.getLock()).isFair());
+        {
+            Connection conn = dataSource.getConnection();
+            conn.close();
+        }
+    }
+
+    public void test_fair_1() throws Exception {
+
+        Connection conn = dataSource.getConnection();
+        conn.close();
+
+        Assert.assertEquals(false, ((ReentrantLock) dataSource.getLock()).isFair());
+        dataSource.setMaxWait(100);
+
+        Assert.assertEquals(false, ((ReentrantLock) dataSource.getLock()).isFair());
+    }
+}