Encrypt tool and Decrypter

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

@@ -0,0 +1,44 @@
+package com.alibaba.druid.bvt.pool;
+
+import com.alibaba.druid.pool.DecryptException;
+import com.alibaba.druid.pool.Decrypter;
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.pool.SensitiveParameters;
+import com.alibaba.druid.util.JdbcUtils;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.sql.SQLException;
+
+/**
+ * @author Jonas Yang
+ */
+public class DruidDataSourceDecryptTest {
+
+    @Test
+    public void testDecrypt() throws SQLException {
+        DruidDataSource dataSource = new DruidDataSource();
+        dataSource.setUrl("jdbc:oracle:thin:@");
+        dataSource.setUsername("xiaoyu");
+        dataSource.setPassword("druid");
+
+        dataSource.setDecrypter(new Decrypter() {
+            @Override
+            public SensitiveParameters decrypt(SensitiveParameters parameters) throws DecryptException {
+                Assert.assertEquals("xiaoyu", parameters.getUsername());
+                throw new DecryptException("Test");
+            }
+        });
+
+        try {
+            dataSource.init();
+            dataSource.createPhysicalConnection();
+            Assert.assertTrue("Got Here.", false);
+        } catch (SQLException e) {
+            Assert.assertEquals("The cause clas is " + e.getCause().getClass(), DecryptException.class, e.getCause().getClass());
+            Assert.assertEquals("The excepiton message is " + e.getCause().getMessage(), "Test", e.getCause().getMessage());
+        } finally {
+            JdbcUtils.close(dataSource);
+        }
+    }
+}