Add C++ test

.github/workflows/cxx.yaml

@@ -0,0 +1,23 @@
+# Copyright (c) ONNX Project Contributors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: Build and Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    - run: cmake -GNinja -DONNX_BUILD_TESTS=ON -B build -S .
+    - run: cmake --build build
+    - run: cmake --build build -t test

CMakeLists.txt

@@ -98,3 +98,10 @@ install(TARGETS
   onnx_optimizer onnx_optimizer_c_api
   EXPORT ONNXOptimizerTargets DESTINATION ${CMAKE_INSTALL_LIBDIR})
 
+if(ONNX_BUILD_TESTS)
+  enable_testing()
+  include(third_party/onnx/cmake/external/googletest.cmake)
+  add_executable(test_simple tests/test_simple.cc)
+  target_link_libraries(test_simple onnx_optimizer gtest gtest_main) 
+  add_test(NAME test_simple COMMAND ${CMAKE_CURRENT_BINARY_DIR}/test_simple)
+endif()

tests/test_simple.cc

@@ -0,0 +1,25 @@
+#include <gtest/gtest.h>
+#include <onnxoptimizer/optimize.h>
+#include <onnx/defs/parser.h>
+
+TEST(OptimizerTest, NopReshape) {
+    const char* graph_str = R"(
+        <
+            ir_version: 7,
+            opset_import: [ "": 10]
+        >
+        agraph (float[5, 7] X) => (float[5, 7] Z)
+        {
+            Shape = Constant<value=int64[2]{5, -1}> ()
+            Y = Reshape (X, Shape)
+            Z = Identity(Y)
+        }
+    )";
+    onnx::ModelProto model;
+    const onnx::Status status = onnx::OnnxParser::Parse(model, graph_str);
+    EXPECT_TRUE(status.IsOK());
+    auto optimized_model = onnx::optimization::Optimize(model, {"eliminate_nop_reshape", "eliminate_deadend"});
+
+    ASSERT_EQ(optimized_model.graph().node().size(), 1);
+    ASSERT_EQ(optimized_model.graph().node()[0].op_type(), "Identity");
+}