diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3bb0fa915c..216befb86e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,7 +21,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build_cpu:
+  build_cpu_model_convert:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
@@ -53,12 +53,41 @@ jobs:
           pip install -U numpy
       - name: Build and install
         run: rm -rf .eggs && pip install -e .
-      - name: Run unittests and generate coverage report
+      - name: Run python unittests and generate coverage report
         run: |
           coverage run --branch --source mmdeploy -m pytest -rsE tests
           coverage xml
           coverage report -m
 
+  build_cpu_sdk:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+      - name: update
+        run: sudo apt update
+      - name: gcc-multilib
+        run: |
+          sudo apt install gcc-multilib g++-multilib wget libprotobuf-dev protobuf-compiler
+          sudo apt update
+          sudo apt install -y ffmpeg libsm6 libxext6 git ninja-build libglib2.0-0 libxrender-dev libc++1-9 libc++abi1-9
+          sudo add-apt-repository ppa:ignaciovizzo/opencv3-nonfree
+          sudo apt install libopencv-dev lcov wget
+          pkg-config --libs opencv
+      - name: Build and run SDK unit test without backend
+        run: |
+          mkdir -p build && pushd build
+          cmake .. -DCMAKE_CXX_COMPILER=g++-7  -DMMDEPLOY_CODEBASES=all    -DMMDEPLOY_BUILD_SDK=ON     -DMMDEPLOY_BUILD_SDK_PYTHON_API=OFF     -DMMDEPLOY_TARGET_DEVICES=cpu   -DMMDEPLOY_COVERAGE=ON  -DMMDEPLOY_BUILD_TEST=ON
+          make -j2
+          mkdir -p mmdeploy_test_resources/transform
+          cp ../tests/data/tiger.jpeg mmdeploy_test_resources/transform/
+          ./bin/mmdeploy_tests
+          lcov --capture --directory . --output-file coverage.info
+          ls -lah coverage.info
+          cp coverage.info ../
+
   build_cuda102:
     runs-on: ubuntu-18.04
     container:
@@ -153,8 +182,8 @@ jobs:
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v2
         with:
-          file: ./coverage.xml
+          file: ./coverage.xml,./coverage.info
           flags: unittests
-          env_vars: OS,PYTHON
+          env_vars: OS,PYTHON,CPLUS
           name: codecov-umbrella
           fail_ci_if_error: false
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6dd7d05165..76e6ebe686 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -33,6 +33,8 @@ option(MMDEPLOY_BUILD_SDK_JAVA_API "build SDK JAVA API" OFF)
 option(MMDEPLOY_BUILD_EXAMPLES "build examples" OFF)
 option(MMDEPLOY_SPDLOG_EXTERNAL "use external spdlog" OFF)
 option(MMDEPLOY_ZIP_MODEL "support SDK model in zip format" OFF)
+option(MMDEPLOY_COVERAGE "build SDK for coverage" OFF)
+
 set(MMDEPLOY_TARGET_DEVICES "cpu" CACHE STRING "target devices to support")
 set(MMDEPLOY_TARGET_BACKENDS "" CACHE STRING "target inference engines to support")
 set(MMDEPLOY_CODEBASES "all" CACHE STRING "select OpenMMLab codebases")
@@ -49,6 +51,11 @@ endif ()
 
 set(MMDEPLOY_TASKS "" CACHE INTERNAL "")
 
+if (MMDEPLOY_COVERAGE)
+    add_compile_options(-coverage -fprofile-arcs -ftest-coverage)
+    add_link_options(-coverage -lgcov)
+endif ()
+
 # when CUDA devices are enabled, the environment variable ASAN_OPTIONS=protect_shadow_gap=0
 # must be set at runtime
 if (MMDEPLOY_ASAN_ENABLE)
diff --git a/csrc/mmdeploy/preprocess/transform/collect.cpp b/csrc/mmdeploy/preprocess/transform/collect.cpp
index 119415cd70..2a63a9b570 100644
--- a/csrc/mmdeploy/preprocess/transform/collect.cpp
+++ b/csrc/mmdeploy/preprocess/transform/collect.cpp
@@ -45,8 +45,7 @@ Result<Value> CollectImpl::Process(const Value &input) {
   }
   for (auto &key : arg_.keys) {
     if (!input.contains(key)) {
-      MMDEPLOY_ERROR("missed key '{}' in input", key);
-      //      return Status(eInvalidArgument);
+      MMDEPLOY_INFO("missed key '{}' in input", key);
       return Status(eInvalidArgument);
     } else {
       output[key] = input[key];
diff --git a/tests/test_csrc/core/test_execution.cpp b/tests/test_csrc/core/test_execution.cpp
index a8bdd39179..5704883cb2 100644
--- a/tests/test_csrc/core/test_execution.cpp
+++ b/tests/test_csrc/core/test_execution.cpp
@@ -30,7 +30,7 @@ TEST_CASE("test basic execution", "[execution]") {
   static_assert(std::is_same_v<decltype(GetCompletionScheduler(b)), InlineScheduler>);
   auto c = Then(b, [](Value v) -> Value { return {{"c", v["a"].get<int>() + v["b"].get<int>()}}; });
   auto d = SyncWait(c);
-  MMDEPLOY_ERROR("{}", d);
+  MMDEPLOY_INFO("{}", d);
 }
 
 template <class Sender>
@@ -45,7 +45,7 @@ TEST_CASE("test split", "[execution]") {
   auto y = GetKey(s, "y");
   auto x_v = SyncWait(x);
   auto y_v = SyncWait(y);
-  MMDEPLOY_ERROR("x = {}, y = {}", x_v, y_v);
+  MMDEPLOY_INFO("x = {}, y = {}", x_v, y_v);
 }
 
 TEST_CASE("test when_all", "[execution]") {
@@ -56,7 +56,7 @@ TEST_CASE("test when_all", "[execution]") {
   auto e = Just(500);
   auto t = WhenAll(a, b, c, d, e);
   auto v = SyncWait(t);
-  MMDEPLOY_ERROR("v = {}", v);
+  MMDEPLOY_INFO("v = {}", v);
 }
 
 void Func() {
@@ -65,7 +65,7 @@ void Func() {
       LetValue(a, [](int& x, int& y) { return Then(Just(x + y), [](int v) { return v * v; }); });
   auto v = SyncWait(b);
   static_assert(std::is_same_v<decltype(v), std::tuple<int>>);
-  MMDEPLOY_ERROR("v = {}", v);
+  MMDEPLOY_INFO("v = {}", v);
 }
 
 TEST_CASE("test let_value", "[execution]") { Func(); }
@@ -78,7 +78,7 @@ TEST_CASE("test fork-join", "[execution]") {
   auto xy = WhenAll(x, y);
   auto v = SyncWait(xy);
   static_assert(std::is_same_v<decltype(v), std::tuple<Value, Value>>);
-  MMDEPLOY_ERROR("v = {}", v);
+  MMDEPLOY_INFO("v = {}", v);
 }
 
 TEST_CASE("test ensure_started", "[execution]") {
@@ -97,7 +97,7 @@ TEST_CASE("test ensure_started", "[execution]") {
   std::this_thread::sleep_for(std::chrono::milliseconds(500));
   MMDEPLOY_INFO("ensure_started sync_wait");
   auto v = SyncWait(c);
-  MMDEPLOY_ERROR("ensure_started: {}", v);
+  MMDEPLOY_INFO("ensure_started: {}", v);
 }
 
 TEST_CASE("test start_detached", "[execution]") {
@@ -119,7 +119,7 @@ TEST_CASE("test on", "[execution]") {
   auto b = On(pool.GetScheduler(), a);
   auto c = SyncWait(b);
   static_assert(std::is_same_v<decltype(c), std::tuple<int, int>>);
-  MMDEPLOY_ERROR("c = {}", c);
+  MMDEPLOY_INFO("c = {}", c);
 }
 
 mmdeploy_value_t f(mmdeploy_value_t v, void*) {
@@ -246,7 +246,7 @@ TEST_CASE("test executor C API", "[execution]") {
   REQUIRE(b);
   auto c = mmdeploy_executor_sync_wait(b);
   REQUIRE(c);
-  MMDEPLOY_CRITICAL("{}", *(Value*)c);
+  MMDEPLOY_INFO("{}", *(Value*)c);
   mmdeploy_value_destroy(c);
 }
 
diff --git a/tests/test_csrc/preprocess/test_resize.cpp b/tests/test_csrc/preprocess/test_resize.cpp
index 0935e3d56f..da0500912d 100644
--- a/tests/test_csrc/preprocess/test_resize.cpp
+++ b/tests/test_csrc/preprocess/test_resize.cpp
@@ -116,7 +116,9 @@ void TestResizeWithScaleFactor(const Value& cfg, const std::string& device_name,
     auto transform = CreateTransform(cfg, device, stream);
     REQUIRE(transform != nullptr);
 
-    auto [dst_height, dst_width] = make_tuple(mat.rows * scale_factor, mat.cols * scale_factor);
+    // keep round policy with resize.cpp
+    const int dst_height = static_cast<int>(mat.rows * scale_factor + 0.5);
+    const int dst_width = static_cast<int>(mat.cols * scale_factor + 0.5);
     auto interpolation = cfg["interpolation"].get<string>();
     auto ref_mat = mmdeploy::cpu::Resize(mat, dst_height, dst_width, interpolation);