From 255061a7f2846cb7bf25032887e7d411bbd9476f Mon Sep 17 00:00:00 2001
From: cjamin <cjamin@636b058d-ea47-450e-bf9e-a15bfbe3eedb>
Date: Fri, 2 Sep 2016 14:14:24 +0000
Subject: Test incremental functions + compare results between fixed and
 incremental

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/subsampling_and_spatialsearching@1475 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 4e0136ebdb774dffe7d0840bd1544e1dbc991336
---
 .../test/test_Spatial_tree_data_structure.cpp      | 44 ++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/src/Spatial_searching/test/test_Spatial_tree_data_structure.cpp b/src/Spatial_searching/test/test_Spatial_tree_data_structure.cpp
index 0ca35bc6..207b047f 100644
--- a/src/Spatial_searching/test/test_Spatial_tree_data_structure.cpp
+++ b/src/Spatial_searching/test/test_Spatial_tree_data_structure.cpp
@@ -50,25 +50,69 @@ BOOST_AUTO_TEST_CASE(test_Spatial_tree_data_structure)
 
   Points_ds points_ds(points);
 
+  // Test query_k_nearest_neighbors
   std::size_t closest_pt_index =
     points_ds.query_k_nearest_neighbors(points[10], 1, false).begin()->first;
   BOOST_CHECK(closest_pt_index == 10);
 
   auto kns_range = points_ds.query_k_nearest_neighbors(points[20], 10, true);
 
+  std::vector<std::size_t> knn_result;
   FT last_dist = -1.;
   for (auto const& nghb : kns_range)
   {
     BOOST_CHECK(nghb.second > last_dist);
+    knn_result.push_back(nghb.second);
     last_dist = nghb.second;
   }
 
+  // Test query_incremental_nearest_neighbors 
+  closest_pt_index =
+    points_ds.query_incremental_nearest_neighbors(points[10]).begin()->first;
+  BOOST_CHECK(closest_pt_index == 10);
+
+  auto ins_range = points_ds.query_incremental_nearest_neighbors(points[20]);
+
+  std::vector<std::size_t> inn_result;
+  last_dist = -1.;
+  auto ins_it = ins_range.begin();
+  for (int i = 0 ; i < 10 ; ++ins_it, ++i)
+  {
+    auto const& nghb = *ins_it;
+    BOOST_CHECK(nghb.second > last_dist);
+    inn_result.push_back(nghb.second);
+    last_dist = nghb.second;
+  }
+
+  // Same result for KNN and INN?
+  BOOST_CHECK(knn_result == inn_result);
+
+  // Test query_k_farthest_neighbors
   auto kfs_range = points_ds.query_k_farthest_neighbors(points[20], 10, true);
 
+  std::vector<std::size_t> kfn_result;
   last_dist = kfs_range.begin()->second;
   for (auto const& nghb : kfs_range)
   {
     BOOST_CHECK(nghb.second <= last_dist);
+    kfn_result.push_back(nghb.second);
+    last_dist = nghb.second;
+  }
+
+  // Test query_k_farthest_neighbors
+  auto ifs_range = points_ds.query_incremental_farthest_neighbors(points[20]);
+
+  std::vector<std::size_t> ifn_result;
+  last_dist = ifs_range.begin()->second;
+  auto ifs_it = ifs_range.begin();
+  for (int i = 0; i < 10; ++ifs_it, ++i)
+  {
+    auto const& nghb = *ifs_it;
+    BOOST_CHECK(nghb.second <= last_dist);
+    ifn_result.push_back(nghb.second);
     last_dist = nghb.second;
   }
+
+  // Same result for KFN and IFN?
+  BOOST_CHECK(kfn_result == ifn_result);
 }
-- 
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