diff --git a/native/jni/NativeFileList.mk b/native/jni/NativeFileList.mk
index 6f92ae4..082e1e2 100644
--- a/native/jni/NativeFileList.mk
+++ b/native/jni/NativeFileList.mk
@@ -126,6 +126,7 @@
     suggest/core/layout/normal_distribution_2d_test.cpp \
     suggest/policyimpl/dictionary/structure/v4/content/language_model_dict_content_test.cpp \
     suggest/policyimpl/dictionary/structure/v4/content/probability_entry_test.cpp \
+    suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table_test.cpp \
     suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer_test.cpp \
     suggest/policyimpl/dictionary/utils/byte_array_utils_test.cpp \
     suggest/policyimpl/dictionary/utils/sparse_table_test.cpp \
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table.cpp
index cf238ee..2bdf077 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table.cpp
@@ -34,7 +34,7 @@
 bool TerminalPositionLookupTable::setTerminalPtNodePosition(
         const int terminalId, const int terminalPtNodePos) {
     if (terminalId < 0) {
-        return NOT_A_DICT_POS;
+        return false;
     }
     while (terminalId >= mSize) {
         // Write new entry.
diff --git a/native/jni/tests/suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table_test.cpp b/native/jni/tests/suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table_test.cpp
new file mode 100644
index 0000000..23b9c55
--- /dev/null
+++ b/native/jni/tests/suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table_test.cpp
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include "suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table.h"
+
+#include <gtest/gtest.h>
+
+#include <vector>
+
+#include "defines.h"
+#include "suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h"
+
+namespace latinime {
+namespace {
+
+TEST(TerminalPositionLookupTableTest, TestGetFromEmptyTable) {
+    TerminalPositionLookupTable lookupTable;
+
+    EXPECT_EQ(NOT_A_DICT_POS, lookupTable.getTerminalPtNodePosition(0));
+    EXPECT_EQ(NOT_A_DICT_POS, lookupTable.getTerminalPtNodePosition(-1));
+    EXPECT_EQ(NOT_A_DICT_POS, lookupTable.getTerminalPtNodePosition(
+            Ver4DictConstants::NOT_A_TERMINAL_ID));
+}
+
+TEST(TerminalPositionLookupTableTest, TestSetAndGet) {
+    TerminalPositionLookupTable lookupTable;
+
+    EXPECT_TRUE(lookupTable.setTerminalPtNodePosition(10, 100));
+    EXPECT_EQ(100, lookupTable.getTerminalPtNodePosition(10));
+    EXPECT_EQ(NOT_A_DICT_POS, lookupTable.getTerminalPtNodePosition(9));
+    EXPECT_TRUE(lookupTable.setTerminalPtNodePosition(9, 200));
+    EXPECT_EQ(200, lookupTable.getTerminalPtNodePosition(9));
+    EXPECT_TRUE(lookupTable.setTerminalPtNodePosition(10, 300));
+    EXPECT_EQ(300, lookupTable.getTerminalPtNodePosition(10));
+    EXPECT_FALSE(lookupTable.setTerminalPtNodePosition(-1, 400));
+    EXPECT_EQ(NOT_A_DICT_POS, lookupTable.getTerminalPtNodePosition(-1));
+    EXPECT_FALSE(lookupTable.setTerminalPtNodePosition(Ver4DictConstants::NOT_A_TERMINAL_ID, 500));
+    EXPECT_EQ(NOT_A_DICT_POS, lookupTable.getTerminalPtNodePosition(
+            Ver4DictConstants::NOT_A_TERMINAL_ID));
+}
+
+TEST(TerminalPositionLookupTableTest, TestGC) {
+    TerminalPositionLookupTable lookupTable;
+
+    const std::vector<int> terminalIds = { 10, 20, 30 };
+    const std::vector<int> terminalPositions = { 100, 200, 300 };
+
+    for (size_t i = 0; i < terminalIds.size(); ++i) {
+        EXPECT_TRUE(lookupTable.setTerminalPtNodePosition(terminalIds[i], terminalPositions[i]));
+    }
+
+    TerminalPositionLookupTable::TerminalIdMap terminalIdMap;
+    EXPECT_TRUE(lookupTable.runGCTerminalIds(&terminalIdMap));
+
+    for (size_t i = 0; i < terminalIds.size(); ++i) {
+        EXPECT_EQ(static_cast<int>(i), terminalIdMap[terminalIds[i]])
+                << "Terminal id (" << terminalIds[i] << ") should be changed to " << i;
+        EXPECT_EQ(terminalPositions[i], lookupTable.getTerminalPtNodePosition(i));
+    }
+}
+
+}  // namespace
+}  // namespace latinime