diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index dd879a9..b3f2aea 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -52,7 +52,13 @@ jobs:
         run: |
           sudo apt-get update -y 
           sudo apt-get install -y libarchive-dev libssl-dev autoconf libtool pkg-config cmake make gcc g++
-          ${{ env.build_command }}
+          ${{ env.build_command }} -DULIB_BUILD_TESTS=ON
+
+      - name: run_gtest
+        if: matrix.toolchain == 'host.toolchain.cmake'
+        run: |
+          cd ${{ github.workspace }}
+          cmake --build build --config ${{ matrix.build_type }} --target test 
 
       - name: build-afl
         if: matrix.toolchain == 'host-afl.toolchain.cmake'
diff --git a/.gitignore b/.gitignore
index ab09395..22b0db6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,4 +47,5 @@ _deps
 
 # Clion
 .idea/
-cmake-*
+cmake-build-*
+build/
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..923464d
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "3party/googletest"]
+	path = 3party/googletest
+	url = https://code.uocat.com/3party/googletest
+	branch = release-1.8.1
diff --git a/3party/googletest b/3party/googletest
new file mode 160000
index 0000000..b3a9ba2
--- /dev/null
+++ b/3party/googletest
@@ -0,0 +1 @@
+Subproject commit b3a9ba2b8e975550799838332803d468797ae2e1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5edac56..6e2254b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,3 +36,9 @@ add_executable(ulib_main_test src/main.cpp)
 target_link_libraries(ulib_main_test PRIVATE ${PROJECT_NAME})
 
 install(TARGETS ${PROJECT_NAME} DESTINATION lib)
+
+if(ULIB_BUILD_TESTS)
+    enable_testing()
+    add_subdirectory(3party/googletest)
+    add_subdirectory(tests)
+endif()
\ No newline at end of file
diff --git a/src/sigslot/sigslot.h b/src/ulib/sigslot/sigslot.h
similarity index 100%
rename from src/sigslot/sigslot.h
rename to src/ulib/sigslot/sigslot.h
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 0000000..2ae4de3
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.10)
+project(ulib_test)
+
+set(CMAKE_CXX_STANDARD 98)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+add_executable(ulib_test src/ulib/sigslot/sigslot_test.cpp)
+target_link_libraries(ulib_test gtest gtest_main)
+
+add_test(NAME ulib_test COMMAND ulib_test)
diff --git a/tests/src/ulib/sigslot/sigslot_test.cpp b/tests/src/ulib/sigslot/sigslot_test.cpp
new file mode 100644
index 0000000..09cde97
--- /dev/null
+++ b/tests/src/ulib/sigslot/sigslot_test.cpp
@@ -0,0 +1,3 @@
+//
+// Created by tqcq on 2023/12/5.
+//