ADD: test for shark utils

Modules/Learning/LearningBase/test/otbSharkUtilsTests.cxx

+/*
+ * Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
+ *
+ * This file is part of Orfeo Toolbox
+ *
+ *     https://www.orfeo-toolbox.org/
+ *
+ * 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 "itkMacro.h"
+#include "otbSharkUtils.h"
+
+
+int otbSharkNormalizeLabels(int itkNotUsed(argc), char* itkNotUsed(argv) [])
+{
+  std::vector<unsigned int> inLabels = {2, 2, 3, 20, 1};
+  std::vector<unsigned int> expectedDictionary = {2, 3, 20, 1};
+  std::vector<unsigned int> expectedLabels = {0, 0, 1, 2, 3};
+
+  auto newLabels = inLabels;
+  std::vector<unsigned int> labelDict;
+  otb::Shark::NormalizeLabelsAndGetDictionary(newLabels, labelDict);
+
+  if(newLabels != expectedLabels)
+    {
+    std::cout << "Wrong new labels\n";
+    for(size_t i = 0; i<newLabels.size(); ++i)
+      std::cout << "Got " << newLabels[i] << " expected " << expectedLabels[i] << '\n';
+
+    return EXIT_FAILURE;
+    }
+
+  if(labelDict != expectedDictionary)
+    {
+    std::cout << "Wrong dictionary\n";
+    for(size_t i = 0; i<labelDict.size(); ++i)
+      std::cout << "Got " << labelDict[i] << " expected " << expectedDictionary[i] << '\n';
+
+    return EXIT_FAILURE;
+    }
+
+  return EXIT_SUCCESS;
+}