diff --git a/modules/planning/common/BUILD b/modules/planning/common/BUILD
index 78c7bf9681ee3c4cc543e46cdb2539a56c196ef7..ff27b30c327118d8f6203bf20f68a2339ec13e16 100644
--- a/modules/planning/common/BUILD
+++ b/modules/planning/common/BUILD
@@ -9,6 +9,18 @@ cc_library(
     ],
 )
 
+cc_test(
+    name = "indexed_list_test",
+    srcs = [
+        "indexed_list_test.cc",
+    ],
+    deps = [
+        ":indexed_list",
+        "//modules/common/util",
+        "@gtest//:main",
+    ],
+)
+
 cc_library(
     name = "indexed_queue",
     hdrs = [
diff --git a/modules/planning/common/indexed_list_test.cc b/modules/planning/common/indexed_list_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0c176c0e99809770b2f760cac45b33ebe145617c
--- /dev/null
+++ b/modules/planning/common/indexed_list_test.cc
@@ -0,0 +1,74 @@
+/******************************************************************************
+ * Copyright 2017 The Apollo Authors. All Rights Reserved.
+ *
+ * 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.
+ *****************************************************************************/
+
+/**
+ * @file
+ **/
+
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+#include "modules/common/proto/pnc_point.pb.h"
+
+#include "modules/common/util/util.h"
+#include "modules/planning/common/indexed_list.h"
+
+namespace apollo {
+namespace planning {
+
+using StringIndexedList = IndexedList<int, std::string>;
+TEST(IndexedList, Add) {
+  StringIndexedList object;
+  {
+    ASSERT_TRUE(object.Add(1, common::util::make_unique<std::string>("one")));
+    ASSERT_TRUE(object.Find(1) != nullptr);
+    const auto& items = object.Items();
+    ASSERT_TRUE(object.Find(2) == nullptr);
+    ASSERT_FALSE(object.Add(1, common::util::make_unique<std::string>("one")));
+    ASSERT_EQ(1, items.size());
+    ASSERT_EQ("one", *items[0]);
+  }
+  {
+    ASSERT_TRUE(object.Add(2, common::util::make_unique<std::string>("two")));
+    ASSERT_FALSE(object.Add(2, common::util::make_unique<std::string>("two")));
+    ASSERT_TRUE(object.Find(1) != nullptr);
+    ASSERT_TRUE(object.Find(2) != nullptr);
+    const auto& items = object.Items();
+    ASSERT_EQ(2, items.size());
+    ASSERT_EQ("one", *items[0]);
+    ASSERT_EQ("two", *items[1]);
+  }
+}
+
+TEST(IndexedList, Find) {
+  StringIndexedList object;
+  ASSERT_TRUE(object.Add(1, common::util::make_unique<std::string>("one")));
+  auto* one = object.Find(1);
+  ASSERT_EQ(*one, "one");
+  ASSERT_TRUE(one != nullptr);
+  *one = "one_again";
+  const auto* one_again = object.Find(1);
+  ASSERT_TRUE(one_again != nullptr);
+  ASSERT_EQ("one_again", *one_again);
+  ASSERT_FALSE(object.Find(2));
+}
+
+}  // namespace planning
+}  // namespace apollo