Starting writing tests for the mtos

tests/morpho/CMakeLists.txt

@@ -23,6 +23,7 @@ add_core_test(${test_prefix}maxtree maxtree.cpp)
 add_core_test(${test_prefix}alphatree alphatree.cpp)
 add_core_test(${test_prefix}private_directional_hqueue directional_hqueue.cpp)
 add_core_test(${test_prefix}component_tree component_tree.cpp)
+add_core_test(${test_prefix}MToS mtos.cpp)
 
 
 target_link_libraries(${test_prefix}dilate PRIVATE TBB::TBB)

tests/morpho/mtos.cpp

+#include <mln/morpho/mtos.hpp>
+
+#include <mln/core/image/view/channel.hpp>
+#include <mln/morpho/tos.hpp>
+
+#include <mln/morpho/private/trees_fusion.hpp>
+
+#include <gtest/gtest.h>
+
+TEST(Morpho, GoS)
+{
+  mln::image2d<mln::rgb8> input = {
+      {{255, 146, 0}, {31, 174, 0}, {45, 0, 255}, {255, 75, 0}, {31, 174, 0}}, //
+      {{45, 0, 255}, {255, 75, 0}, {3, 0, 0}, {45, 0, 255}, {255, 255, 255}},  //
+      {{3, 0, 0}, {31, 174, 0}, {255, 75, 0}, {31, 174, 0}, {255, 75, 0}},     //
+      {{31, 174, 0}, {255, 255, 255}, {45, 0, 255}, {3, 0, 0}, {45, 0, 255}},  //
+      {{255, 75, 0}, {31, 174, 0}, {255, 75, 0}, {31, 174, 0}, {255, 146, 0}}, //
+  };
+
+  std::vector<std::vector<int>> tree_to_graph_ref = {{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13},
+                                                     {0, 2, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25},
+                                                     {0, 26, 27, 28, 29, 30}};
+
+  mln::morpho::component_tree<> trees[3];
+  mln::image2d<int>             nodemaps[3];
+  std::vector<int>              depths[3];
+
+  for (int i = 0; i < 3; i++)
+  {
+    std::tie(trees[i], nodemaps[i]) = mln::morpho::tos(mln::view::channel(input, i), {0, 0});
+    depths[i]                       = trees[i].compute_depth();
+  }
+
+  auto [graph, tree_to_graph] = mln::morpho::details::compute_inclusion_graph(trees, nodemaps, depths, 3);
+
+  // Check number of nodes in the GoS
+  ASSERT_EQ(graph.size(), 31);
+
+  // Compare the map tree node -> graph node
+  for (int i = 0; i < 3; i++)
+  {
+    for (int j = 0; j < (int)tree_to_graph[i].size(); j++)
+      ASSERT_EQ(tree_to_graph[i][j], tree_to_graph_ref[i][j]);
+  }
+}
+
+TEST(Morpho, DepthMap)
+{
+  // Test depth map computation for GoS
+}
+
+TEST(Morpho, Satmaxtree)
+{
+  // Test satmaxtree computation from depth map
+}
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