diff --git a/storage/src/test/java/com/zfoo/storage/util/lambda/TestFieldUtils.java b/storage/src/test/java/com/zfoo/storage/util/TestFieldUtils.java
similarity index 56%
rename from storage/src/test/java/com/zfoo/storage/util/lambda/TestFieldUtils.java
rename to storage/src/test/java/com/zfoo/storage/util/TestFieldUtils.java
index c95ddf60..eff121e7 100644
--- a/storage/src/test/java/com/zfoo/storage/util/lambda/TestFieldUtils.java
+++ b/storage/src/test/java/com/zfoo/storage/util/TestFieldUtils.java
@@ -1,4 +1,16 @@
-package com.zfoo.storage.util.lambda;
+/*
+ * Copyright (C) 2020 The zfoo Authors
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and limitations under the License.
+ */
+
+package com.zfoo.storage.util;
 
 import com.zfoo.protocol.util.FieldUtils;
 import org.junit.Test;
diff --git a/storage/src/test/java/com/zfoo/storage/util/lambda/TestLambdaFunction.java b/storage/src/test/java/com/zfoo/storage/util/TestLambdaFunction.java
similarity index 65%
rename from storage/src/test/java/com/zfoo/storage/util/lambda/TestLambdaFunction.java
rename to storage/src/test/java/com/zfoo/storage/util/TestLambdaFunction.java
index 24d6a947..bd8a50b2 100644
--- a/storage/src/test/java/com/zfoo/storage/util/lambda/TestLambdaFunction.java
+++ b/storage/src/test/java/com/zfoo/storage/util/TestLambdaFunction.java
@@ -1,8 +1,20 @@
-package com.zfoo.storage.util.lambda;
+/*
+ * Copyright (C) 2020 The zfoo Authors
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and limitations under the License.
+ */
+
+package com.zfoo.storage.util;
 
 import com.zfoo.storage.resource.TeacherResource;
-import com.zfoo.storage.util.LambdaUtils;
 import com.zfoo.storage.util.function.Func1;
+import com.zfoo.storage.util.lambda.LambdaMeta;
 import org.junit.Test;
 
 import java.io.Serializable;
diff --git a/storage/src/test/java/com/zfoo/storage/util/TestLambdaFunctionCache.java b/storage/src/test/java/com/zfoo/storage/util/TestLambdaFunctionCache.java
new file mode 100644
index 00000000..6e0fde5d
--- /dev/null
+++ b/storage/src/test/java/com/zfoo/storage/util/TestLambdaFunctionCache.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2020 The zfoo Authors
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and limitations under the License.
+ */
+
+package com.zfoo.storage.util;
+
+import com.zfoo.storage.resource.StudentResource;
+import com.zfoo.storage.util.function.Func1;
+import org.junit.Test;
+
+/**
+ * @author veione
+ */
+public class TestLambdaFunctionCache {
+
+    @Test
+    public void testFunctionCache() {
+        Func1<StudentResource, Object> nameFunc = StudentResource::getName;
+        System.out.println(LambdaUtils.getMethodName(nameFunc));
+        System.out.println(LambdaUtils.getMethodName(nameFunc));
+    }
+}
diff --git a/storage/src/test/java/com/zfoo/storage/util/lambda/TestLambdaFunctionCache.java b/storage/src/test/java/com/zfoo/storage/util/lambda/TestLambdaFunctionCache.java
deleted file mode 100644
index 80daac03..00000000
--- a/storage/src/test/java/com/zfoo/storage/util/lambda/TestLambdaFunctionCache.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package com.zfoo.storage.util.lambda;
-
-import com.zfoo.storage.resource.StudentResource;
-import com.zfoo.storage.util.LambdaUtils;
-import com.zfoo.storage.util.function.Func1;
-import org.junit.Test;
-
-/**
- * @author veione
- */
-public class TestLambdaFunctionCache {
-
-    @Test
-    public void testFunctionCache() {
-        Func1<StudentResource, Object> nameFunc = StudentResource::getName;
-        System.out.println(LambdaUtils.getMethodName(nameFunc));
-        System.out.println(LambdaUtils.getMethodName(nameFunc));
-    }
-}