Add unit test for accuracy layer.

diff --git a/src/caffe/test/test_accuracy_layer.cpp b/src/caffe/test/test_accuracy_layer.cpp
new file mode 100644 (file)
index 0000000..f87089b
--- /dev/null
+++ b/src/caffe/test/test_accuracy_layer.cpp
@@ -0,0 +1,90 @@
+// Copyright 2014 BVLC and contributors.
+
+#include <cmath>
+#include <cstring>
+#include <cfloat>
+#include <vector>
+
+#include "cuda_runtime.h"
+#include "gtest/gtest.h"
+#include "caffe/blob.hpp"
+#include "caffe/common.hpp"
+#include "caffe/filler.hpp"
+#include "caffe/vision_layers.hpp"
+
+#include "caffe/test/test_caffe_main.hpp"
+
+namespace caffe {
+
+extern cudaDeviceProp CAFFE_TEST_CUDA_PROP;
+
+template <typename Dtype>
+class AccuracyLayerTest : public ::testing::Test {
+ protected:
+  AccuracyLayerTest()
+      : blob_bottom_data_(new Blob<Dtype>(2, 10, 1, 1)),
+        blob_bottom_label_(new Blob<Dtype>(2, 1, 1, 1)),
+        blob_top_(new Blob<Dtype>()),
+        top_k_(3) {
+    // fill the probability values
+    FillerParameter filler_param;
+    GaussianFiller<Dtype> filler(filler_param);
+    filler.Fill(this->blob_bottom_data_);
+
+    // set the labels; first label is set to max-probability index
+    Dtype m_val = -FLT_MAX;
+    int m_id = 0;
+    for (int i = 0; i < 10; i++)
+      if (blob_bottom_data_->data_at(0, i, 0, 0) > m_val) {
+        m_val = blob_bottom_data_->data_at(0, i, 0, 0);
+        m_id = i;
+      }
+    Dtype* label_data = blob_bottom_label_->mutable_cpu_data();
+    int offset = blob_bottom_label_->offset(0);
+    label_data[offset] = m_id;
+
+    // set the labels; first label is set to min-probability index
+    m_val = FLT_MAX;
+    m_id = 0;
+    for (int i = 0; i < 10; i++)
+      if (blob_bottom_data_->data_at(1, i, 0, 0) < m_val) {
+        m_val = blob_bottom_data_->data_at(1, i, 0, 0);
+        m_id = i;
+      }
+    offset = blob_bottom_label_->offset(1);
+    label_data[offset] = m_id;
+
+    blob_bottom_vec_.push_back(blob_bottom_data_);
+    blob_bottom_vec_.push_back(blob_bottom_label_);
+    blob_top_vec_.push_back(blob_top_);
+  }
+  virtual ~AccuracyLayerTest() {
+    delete blob_bottom_data_;
+    delete blob_bottom_label_;
+    delete blob_top_;
+  }
+  Blob<Dtype>* const blob_bottom_data_;
+  Blob<Dtype>* const blob_bottom_label_;
+  Blob<Dtype>* const blob_top_;
+  vector<Blob<Dtype>*> blob_bottom_vec_;
+  vector<Blob<Dtype>*> blob_top_vec_;
+  int top_k_;
+};
+
+typedef ::testing::Types<float, double> Dtypes;
+TYPED_TEST_CASE(AccuracyLayerTest, Dtypes);
+
+TYPED_TEST(AccuracyLayerTest, TestForwardCPU) {
+  LayerParameter layer_param;
+  AccuracyParameter* accuracy_param = layer_param.mutable_accuracy_param();
+  accuracy_param->set_top_k(this->top_k_);
+  Caffe::set_mode(Caffe::CPU);
+  AccuracyLayer<TypeParam> layer(layer_param);
+  layer.SetUp(this->blob_bottom_vec_, &(this->blob_top_vec_));
+  layer.Forward(this->blob_bottom_vec_, &(this->blob_top_vec_));
+
+  // Output accuracy should be ~0.5
+  EXPECT_NEAR(this->blob_top_->data_at(0, 0, 0, 0), 0.5, 1e-4);
+}
+
+}  // namespace caffe