add unittest.

paddle/gserver/layers/CrossEntropyOverBeam.cpp

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+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 "CrossEntropyOverBeam.h"
+
+namespace paddle {
+
+REGISTER_LAYER(cross_entropy_over_beam, CrossEntropyOverBeam);
+
+bool CrossEntropyOverBeam::init(const LayerMap& layerMap,
+                                const ParameterMap& parameterMap) {
+  /* Initialize the basic parent class */
+  Layer::init(layerMap, parameterMap);
+
+  setNeedSequenceInfo(false);
+
+  return true;
+}
+
+void CrossEntropyOverBeam::forward(PassType passType) {}
+
+void CrossEntropyOverBeam::backward(const UpdateCallback& callback) {}
+
+}  // namespace paddle

paddle/gserver/layers/CrossEntropyOverBeam.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+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. */
+
+#pragma once
+
+#include "CrossEntropyOverBeam.h"
+#include "Layer.h"
+
+namespace paddle {
+
+class CrossEntropyOverBeam : public Layer {
+public:
+  explicit CrossEntropyOverBeam(const LayerConfig& config) : Layer(config) {}
+  bool init(const LayerMap& layerMap,
+            const ParameterMap& parameterMap) override;
+  void forward(PassType passType) override;
+  void backward(const UpdateCallback& callback) override;
+};
+
+}  // namespace paddle

paddle/gserver/tests/CMakeLists.txt

@@ -34,6 +34,12 @@ add_unittest_without_exec(test_CRFLayerGrad
 add_test(NAME test_CRFLayerGrad
     COMMAND test_CRFLayerGrad)
 
+################ test_CrossEntropyOverBeam ####################
+add_unittest_without_exec(test_CrossEntropyOverBeam
+    test_CrossEntropyOverBeamGrad.cpp
+    LayerGradUtil.cpp)
+add_test(NAME test_CrossEntropyOverBeam
+    COMMAND test_CrossEntropyOverBeam)
 
 add_unittest_without_exec(test_ActivationGrad
     test_ActivationGrad.cpp

paddle/gserver/tests/LayerGradUtil.cpp

@@ -388,14 +388,23 @@ void initDataLayer(TestConfig testConf,
         data.grad->zeroMem();
         break;
       case INPUT_SELF_DEFINE_DATA: {
-        size_t height = testConf.inputDefs[i].selfDefinedData->getHeight();
-        size_t width = testConf.inputDefs[i].selfDefinedData->getWidth();
-        CHECK_GT(static_cast<int>(height), 0);
-        CHECK_GT(static_cast<int>(width), 0);
-        data.value = Matrix::create(height, width, false, useGpu);
-        data.grad = Matrix::create(height, width, false, useGpu);
-        data.value->copyFrom(*testConf.inputDefs[i].selfDefinedData);
-        data.grad->zeroMem();
+        if (testConf.inputDefs[i].ids.size()) {
+          data.ids = IVector::create(testConf.inputDefs[i].ids.size(), useGpu);
+          data.ids->copyFrom(testConf.inputDefs[i].ids.data(),
+                             testConf.inputDefs[i].ids.size());
+        } else if (testConf.inputDefs[i].selfDefinedData) {
+          size_t height = testConf.inputDefs[i].selfDefinedData->getHeight();
+          size_t width = testConf.inputDefs[i].selfDefinedData->getWidth();
+          CHECK_GT(static_cast<int>(height), 0);
+          CHECK_GT(static_cast<int>(width), 0);
+          data.value = Matrix::create(height, width, false, useGpu);
+          data.grad = Matrix::create(height, width, false, useGpu);
+          data.value->copyFrom(*testConf.inputDefs[i].selfDefinedData);
+          data.grad->zeroMem();
+        } else {
+          LOG(FATAL) << "No self-defined data are given.";
+          return;
+        }
 
         const std::vector<int>& labelSeqStartPositions =
             testConf.inputDefs[i].labelSeqStartPositions;

paddle/gserver/tests/LayerGradUtil.h

@@ -68,6 +68,7 @@ struct InputDef {
   std::vector<int> labelInitValue;
   std::vector<int> labelSeqStartPositions;
   std::vector<int> labelSubSeqStartPositions;
+  std::vector<int> ids;
   MatrixPtr selfDefinedData;
 
   InputDef(InputType type, string nameIn, size_t dimIn, size_t sizeIn) {
@@ -95,6 +96,23 @@ struct InputDef {
     isStatic = false;
   }
 
+  InputDef(InputType type,
+           string nameIn,
+           std::vector<int> ids,
+           std::vector<int> selfDefinedSeqStartPos = {},
+           std::vector<int> selfDefinedSubSeqStartPos = {})
+      : labelSeqStartPositions(selfDefinedSeqStartPos),
+        labelSubSeqStartPositions(selfDefinedSubSeqStartPos),
+        ids(ids) {
+    selfDefinedData = nullptr;
+    inputType = type;
+    name = nameIn;
+    dim = 0;
+    sparse = {""};
+    paraSize = 0;
+    isStatic = false;
+  }
+
   InputDef(InputType type,
            string nameIn,
            size_t dimIn,

paddle/gserver/tests/test_CrossEntropyOverBeamGrad.cpp

+/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve.
+
+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 <sstream>
+
+#include <gtest/gtest.h>
+#include "ModelConfig.pb.h"
+#include "paddle/gserver/layers/DataLayer.h"
+#include "paddle/trainer/Trainer.h"
+
+#include "LayerGradUtil.h"
+#include "paddle/testing/TestUtil.h"
+
+using namespace paddle;  // NOLINT
+
+DECLARE_int32(gpu_id);
+DECLARE_bool(thread_local_rand_use_global_seed);
+
+struct SingleBeamExpansion {
+  vector<int> seqStartPos;
+  vector<int> subSeqStartPos;
+
+  vector<real> candidateScores;
+  // TODO(caoying): store this into Argument.ids
+  vector<real> selectedIndices;
+  vector<int> groundTruth;
+};
+
+void genRandomBeamExpansion(size_t expansionCount,
+                            vector<SingleBeamExpansion>& beamExpansions) {
+  beamExpansions.clear();
+}
+
+void testCrossEntropyOverBeam() {
+  const size_t expansionCount = 3;
+  vector<SingleBeamExpansion> beams;
+  genRandomBeamExpansion(expansionCount, beams);
+
+  for (size_t i = 0; i < beams.size(); ++i) {
+    const SingleBeamExpansion& beam = beams[i];
+    // create scores for all the candidates
+    MatrixPtr candidateScorePtr =
+        Matrix::create(beam.candidateScores.size(), 1, false, false);
+    candidateScorePtr->copyFrom(candidateScores.data(), candidateScores.size());
+
+    ostringstream paramName;
+    paramName << "candidate_scores_" << i;
+    beam.subSeqStartPos.size()
+        ? config.inputDefs.push_back({INPUT_SELF_DEFINE_DATA,
+                                      ostr.str(),
+                                      candidateScorePtr,
+                                      beam.seqStartPos,
+                                      beam.subSeqStartPos})
+        : config.inputDefs.push_back({INPUT_SELF_DEFINE_DATA,
+                                      ostr.str(),
+                                      candidateScorePtr,
+                                      beam.seqStartPos});
+    // create indices for the selected candidates
+
+    // create the ground truth
+  }
+}
+
+TestConfig config;
+config.layerConfig.set_type("cross_entropy_over_beam");
+
+// testLayerGrad(
+//     config, "cross_entropy_over_beam", seqNum, false, useGpu, false);
+}
+
+TEST(Layer, CrossEntropyOverBeam) {
+  for (bool useGpu : {false, true}) testCrossEntropyOverBeam(useGpu);
+}
+
+int main(int argc, char** argv) {
+  initMain(argc, argv);
+  hl_start();
+  hl_init(FLAGS_gpu_id);
+  FLAGS_thread_local_rand_use_global_seed = true;
+  srand(1);
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}