Change the example of inference to a unittest.

paddle/inference/CMakeLists.txt

@@ -24,19 +24,6 @@ if(NOT WITH_C_API AND WITH_FLUID)
   install(TARGETS paddle_fluid_shared DESTINATION lib)
 endif()
 
-add_executable(example example.cc)
-if(APPLE)
-  set(OPTIONAL_LINK_FLAGS)
-  if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
-    set(OPTIONAL_LINK_FLAGS "-undefined dynamic_lookup")
-  endif()
-  target_link_libraries(example
-      -Wl,-force_load paddle_fluid
-      ${OPTIONAL_LINK_FLAGS}
-      ${PTOOLS_LIB})
-else()
-  target_link_libraries(example
-      -Wl,--start-group -Wl,--whole-archive paddle_fluid
-      -Wl,--no-whole-archive -Wl,--end-group
-      ${PTOOLS_LIB})
+if(WITH_TESTING)
+  add_subdirectory(tests/book)
 endif()

paddle/inference/tests/book/CMakeLists.txt

@@ -0,0 +1,13 @@
+add_executable(test_inference_recognize_digits_mlp test_inference_recognize_digits_mlp.cc)
+target_circle_link_libraries(
+    test_inference_recognize_digits_mlp
+    ARCHIVE_START
+    paddle_fluid
+    ARCHIVE_END
+    gtest
+    gflags)
+add_test(
+    NAME test_inference_recognize_digits_mlp
+    COMMAND test_inference_recognize_digits_mlp
+           --dirname=${PADDLE_SOURCE_DIR}/python/paddle/v2/fluid/tests/book/recognize_digits_mlp.inference.model
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})

paddle/inference/tests/book/test_inference_recognize_digits_mlp.cc

@@ -12,20 +12,17 @@ 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 <gtest/gtest.h>
 #include <time.h>
-#include <iostream>
+#include <sstream>
 #include "gflags/gflags.h"
 #include "paddle/inference/inference.h"
 
 DEFINE_string(dirname, "", "Directory of the inference model.");
 
-int main(int argc, char** argv) {
-  google::ParseCommandLineFlags(&argc, &argv, true);
+TEST(inference, recognize_digits_mlp) {
   if (FLAGS_dirname.empty()) {
-    // Example:
-    //   ./example --dirname=recognize_digits_mlp.inference.model
-    std::cout << "Usage: ./example --dirname=path/to/your/model" << std::endl;
-    exit(1);
+    LOG(FATAL) << "Usage: ./example --dirname=path/to/your/model";
   }
 
   std::cout << "FLAGS_dirname: " << FLAGS_dirname << std::endl;
@@ -48,20 +45,21 @@ int main(int argc, char** argv) {
   engine->Execute(feeds, fetchs);
 
   for (size_t i = 0; i < fetchs.size(); ++i) {
-    auto dims_i = fetchs[i].dims();
-    std::cout << "dims_i:";
-    for (int j = 0; j < dims_i.size(); ++j) {
-      std::cout << " " << dims_i[j];
-    }
-    std::cout << std::endl;
-    std::cout << "result:";
+    LOG(INFO) << fetchs[i].dims();
+    std::stringstream ss;
+    ss << "result:";
     float* output_ptr = fetchs[i].data<float>();
-    for (int j = 0; j < paddle::framework::product(dims_i); ++j) {
-      std::cout << " " << output_ptr[j];
+    for (int j = 0; j < fetchs[i].numel(); ++j) {
+      ss << " " << output_ptr[j];
     }
-    std::cout << std::endl;
+    LOG(INFO) << ss.str();
   }
 
   delete engine;
-  return 0;
+}
+
+int main(int argc, char** argv) {
+  google::ParseCommandLineFlags(&argc, &argv, false);
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
 }