diff --git a/src/test/java/com/zeekling/cn/package-info.java b/src/test/java/com/zeekling/cn/package-info.java
new file mode 100644
index 0000000..a14a81f
--- /dev/null
+++ b/src/test/java/com/zeekling/cn/package-info.java
@@ -0,0 +1 @@
+package com.zeekling.cn;
\ No newline at end of file
diff --git a/src/test/java/com/zeekling/cn/rocksdb/RocksDbLoadTest.java b/src/test/java/com/zeekling/cn/rocksdb/RocksDbLoadTest.java
new file mode 100644
index 0000000..25f1065
--- /dev/null
+++ b/src/test/java/com/zeekling/cn/rocksdb/RocksDbLoadTest.java
@@ -0,0 +1,15 @@
+package com.zeekling.cn.rocksdb;
+
+import org.junit.Test;
+import org.rocksdb.RocksDB;
+
+public class RocksDbLoadTest {
+
+    @Test
+    public void rocksdbLoad() {
+        RocksDB.loadLibrary();
+        RocksDB.Version version = RocksDB.rocksdbVersion();
+        System.out.println(version);
+    }
+
+}
diff --git a/src/test/java/com/zeekling/cn/string/RegexTest.java b/src/test/java/com/zeekling/cn/string/RegexTest.java
new file mode 100644
index 0000000..9e34bb4
--- /dev/null
+++ b/src/test/java/com/zeekling/cn/string/RegexTest.java
@@ -0,0 +1,16 @@
+package com.zeekling.cn.string;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class RegexTest {
+
+    @Test
+    public void testRegex() {
+        String regex = "test//";
+        String replaceAll = regex.replaceAll("[^a-zA-Z0-9\\-]", "_");
+        Assert.assertTrue("test__".equalsIgnoreCase(replaceAll));
+        System.out.println(replaceAll);
+    }
+
+}