cross_component_nn.cu

/*
 * SPDX-FileCopyrightText: Copyright (c) 2018-2026, NVIDIA CORPORATION.
 * SPDX-License-Identifier: Apache-2.0
 */

// XXX: We allow the instantiation of masked_l2_nn here:
// raft::sparse::neighbors::FixConnectivitiesRedOp<value_idx, value_t> red_op(params.n_row);
// cuvs::sparse::neighbors::cross_component_nn<value_idx, value_t>(
//   handle, out_edges, data.data(), colors.data(), params.n_row, params.n_col, red_op);
//
// TODO: consider adding this to libraft.so or creating an instance in a
// separate translation unit for this test.
//
// TODO: edge case testing. Reference: https://github.com/rapidsai/raft/issues/1669

#include "../../test_utils.cuh"

#include "../../../src/cluster/single_linkage.cuh"
#include "../../../src/sparse/neighbors/cross_component_nn.cuh"
#include <cuvs/distance/distance.hpp>
#include <raft/core/resource/cuda_stream.hpp>
#include <raft/linalg/transpose.cuh>
#include <raft/sparse/convert/csr.cuh>
#include <raft/sparse/coo.hpp>
#include <raft/sparse/linalg/symmetrize.cuh>
#include <raft/sparse/solver/mst.cuh>
#include <raft/util/cuda_utils.cuh>
#include <raft/util/cudart_utils.hpp>

#include <rmm/device_uvector.hpp>

#include <gtest/gtest.h>

#include <vector>

namespace cuvs {
namespace sparse {

using namespace std;

template <typename value_t, typename value_idx>
struct ConnectComponentsInputs {
  value_idx n_row;
  value_idx n_col;
  std::vector<value_t> data;

  int c;
};

template <typename value_idx, typename value_t>
class ConnectComponentsTest
  : public ::testing::TestWithParam<ConnectComponentsInputs<value_t, value_idx>> {
 protected:
  void basicTest()
  {
    raft::resources handle;

    auto stream = raft::resource::get_cuda_stream(handle);

    params = ::testing::TestWithParam<ConnectComponentsInputs<value_t, value_idx>>::GetParam();

    raft::sparse::COO<value_t, value_idx> out_edges(stream);
    raft::sparse::COO<value_t, value_idx> out_edges_batched(stream);

    rmm::device_uvector<value_t> data(params.n_row * params.n_col, stream);

    raft::copy(
      data.data(), params.data.data(), data.size(), raft::resource::get_cuda_stream(handle));

    rmm::device_uvector<value_idx> indptr(params.n_row + 1, stream);

    /**
     * 1. Construct knn graph
     */
    raft::sparse::COO<value_t, value_idx> knn_graph_coo(stream);

    auto data_view = raft::make_device_matrix_view<value_t, value_idx, raft::row_major>(
      data.data(), params.n_row, params.n_col);
    cuvs::neighbors::detail::knn_graph<value_idx, value_t, size_t>(
      handle, data_view, cuvs::distance::DistanceType::L2SqrtExpanded, knn_graph_coo, params.c);

    raft::sparse::convert::sorted_coo_to_csr(
      knn_graph_coo.rows(), knn_graph_coo.nnz, indptr.data(), params.n_row + 1, stream);

    /**
     * 2. Construct MST, sorted by weights
     */
    rmm::device_uvector<value_idx> colors(params.n_row, stream);

    auto mst_coo =
      raft::sparse::solver::mst<value_idx, value_idx, value_t, double>(handle,
                                                                       indptr.data(),
                                                                       knn_graph_coo.cols(),
                                                                       knn_graph_coo.vals(),
                                                                       params.n_row,
                                                                       knn_graph_coo.nnz,
                                                                       colors.data(),
                                                                       stream,
                                                                       false,
                                                                       true);

    /**
     * 3. cross_component_nn to fix connectivities
     */
    cuvs::sparse::neighbors::FixConnectivitiesRedOp<value_idx, value_t> red_op(params.n_row);
    cuvs::sparse::neighbors::cross_component_nn<value_idx, value_t>(handle,
                                                                    out_edges,
                                                                    data.data(),
                                                                    colors.data(),
                                                                    params.n_row,
                                                                    params.n_col,
                                                                    red_op,
                                                                    params.n_row,
                                                                    params.n_col);

    cuvs::sparse::neighbors::cross_component_nn<value_idx, value_t>(handle,
                                                                    out_edges_batched,
                                                                    data.data(),
                                                                    colors.data(),
                                                                    params.n_row,
                                                                    params.n_col,
                                                                    red_op,
                                                                    params.n_row / 2,
                                                                    params.n_col / 2);

    ASSERT_TRUE(out_edges.nnz == out_edges_batched.nnz);

    ASSERT_TRUE(
      devArrMatch(out_edges.rows(), out_edges_batched.rows(), out_edges.nnz, Compare<int>()));

    ASSERT_TRUE(
      devArrMatch(out_edges.cols(), out_edges_batched.cols(), out_edges.nnz, Compare<int>()));

    ASSERT_TRUE(devArrMatch(
      out_edges.vals(), out_edges_batched.vals(), out_edges.nnz, CompareApprox<float>(1e-4)));

    /**
     * Construct final edge list
     */
    rmm::device_uvector<value_idx> indptr2(params.n_row + 1, stream);

    raft::sparse::convert::sorted_coo_to_csr(
      out_edges.rows(), out_edges.nnz, indptr2.data(), params.n_row + 1, stream);

    auto output_mst = raft::sparse::solver::mst<value_idx, value_idx, value_t>(handle,
                                                                               indptr2.data(),
                                                                               out_edges.cols(),
                                                                               out_edges.vals(),
                                                                               params.n_row,
                                                                               out_edges.nnz,
                                                                               colors.data(),
                                                                               stream,
                                                                               false,
                                                                               false);

    raft::resource::sync_stream(handle, stream);

    // The sum of edges for both MST runs should be n_rows - 1
    final_edges = output_mst.n_edges + mst_coo.n_edges;
  }

  void SetUp() override { basicTest(); }

  void TearDown() override {}

 protected:
  ConnectComponentsInputs<value_t, value_idx> params;

  value_idx final_edges;
};

const std::vector<ConnectComponentsInputs<float, int>> fix_conn_inputsf2 = {
  // Test n_clusters == n_points
  {10,
   5,
   {0.21390334, 0.50261639, 0.91036676, 0.59166485, 0.71162682, 0.10248392, 0.77782677, 0.43772379,
    0.4035871,  0.3282796,  0.47544681, 0.59862974, 0.12319357, 0.06239463, 0.28200272, 0.1345717,
    0.50498218, 0.5113505,  0.16233086, 0.62165332, 0.42281548, 0.933117,   0.41386077, 0.23264562,
    0.73325968, 0.37537541, 0.70719873, 0.14522645, 0.73279625, 0.9126674,  0.84854131, 0.28890216,
    0.85267903, 0.74703138, 0.83842071, 0.34942792, 0.27864171, 0.70911132, 0.21338564, 0.32035554,
    0.73788331, 0.46926692, 0.57570162, 0.42559178, 0.87120209, 0.22734951, 0.01847905, 0.75549396,
    0.76166195, 0.66613745},
   -1},
  // Test n_points == 100
  {100,
   10,
   {6.26168372e-01, 9.30437651e-01, 6.02450208e-01, 2.73025296e-01, 9.53050619e-01, 3.32164396e-01,
    6.88942598e-01, 5.79163537e-01, 6.70341547e-01, 2.70140602e-02, 9.30429671e-01, 7.17721157e-01,
    9.89948537e-01, 7.75253347e-01, 1.34491522e-02, 2.48522428e-02, 3.51413378e-01, 7.64405834e-01,
    7.86373507e-01, 7.18748577e-01, 8.66998621e-01, 6.80316582e-01, 2.51288712e-01, 4.91078420e-01,
    3.76246281e-01, 4.86828710e-01, 5.67464772e-01, 5.30734742e-01, 8.99478296e-01, 7.66699088e-01,
    9.49339111e-01, 3.55248484e-01, 9.06046929e-01, 4.48407772e-01, 6.96395305e-01, 2.44277335e-01,
    7.74840000e-01, 5.21046603e-01, 4.66423971e-02, 5.12019638e-02, 8.95019614e-01, 5.28956953e-01,
    4.31536306e-01, 5.83857744e-01, 4.41787364e-01, 4.68656523e-01, 5.73971433e-01, 6.79989654e-01,
    3.19650588e-01, 6.12579596e-01, 6.49126442e-02, 8.39131142e-01, 2.85252117e-01, 5.84848929e-01,
    9.46507115e-01, 8.58440748e-01, 3.61528940e-01, 2.44215959e-01, 3.80101125e-01, 4.57128957e-02,
    8.82216988e-01, 8.31498633e-01, 7.23474381e-01, 7.75788607e-01, 1.40864146e-01, 6.62092382e-01,
    5.13985168e-01, 3.00686418e-01, 8.70109949e-01, 2.43187753e-01, 2.89391938e-01, 2.84214238e-01,
    8.70985521e-01, 8.77491176e-01, 6.72537226e-01, 3.30929686e-01, 1.85934324e-01, 9.16222614e-01,
    6.18239142e-01, 2.64768597e-01, 5.76145451e-01, 8.62961369e-01, 6.84757925e-01, 7.60549082e-01,
    1.27645356e-01, 4.51004673e-01, 3.92292980e-01, 4.63170803e-01, 4.35449330e-02, 2.17583404e-01,
    5.71832605e-02, 2.06763039e-01, 3.70116249e-01, 2.09750028e-01, 6.17283019e-01, 8.62549231e-01,
    9.84156240e-02, 2.66249156e-01, 3.87635103e-01, 2.85591012e-02, 4.24826068e-01, 4.45795088e-01,
    6.86227676e-01, 1.08848960e-01, 5.96731841e-02, 3.71770228e-01, 1.91548833e-01, 6.95136078e-01,
    9.00700636e-01, 8.76363105e-01, 2.67334632e-01, 1.80619709e-01, 7.94060419e-01, 1.42854171e-02,
    1.09372387e-01, 8.74028108e-01, 6.46403232e-01, 4.86588834e-01, 5.93446175e-02, 6.11886291e-01,
    8.83865057e-01, 3.15879821e-01, 2.27043992e-01, 9.76764951e-01, 6.15620336e-01, 9.76199360e-01,
    2.40548962e-01, 3.21795663e-01, 8.75087904e-02, 8.11234663e-01, 6.96070480e-01, 8.12062321e-01,
    1.21958818e-01, 3.44348628e-02, 8.72630414e-01, 3.06162776e-01, 1.76043529e-02, 9.45894971e-01,
    5.33896401e-01, 6.21642973e-01, 4.93062535e-01, 4.48984262e-01, 2.24560379e-01, 4.24052195e-02,
    4.43447610e-01, 8.95646149e-01, 6.05220676e-01, 1.81840491e-01, 9.70831206e-01, 2.12563586e-02,
    6.92582693e-01, 7.55946922e-01, 7.95086143e-01, 6.05328941e-01, 3.99350764e-01, 4.32846636e-01,
    9.81114529e-01, 4.98266428e-01, 6.37127930e-03, 1.59085889e-01, 6.34682067e-05, 5.59429440e-01,
    7.38827633e-01, 8.93214770e-01, 2.16494306e-01, 9.35430573e-02, 4.75665868e-02, 7.80503518e-01,
    7.86240041e-01, 7.06854594e-01, 2.13725879e-02, 7.68246091e-01, 4.50234808e-01, 5.21231104e-01,
    5.01989826e-03, 4.22081572e-02, 1.65337732e-01, 8.54134740e-01, 4.99430262e-01, 8.94525601e-01,
    1.14028379e-01, 3.69739861e-01, 1.32955599e-01, 2.65563824e-01, 2.52811151e-01, 1.44792843e-01,
    6.88449594e-01, 4.44921417e-01, 8.23296587e-01, 1.93266317e-01, 1.19033309e-01, 1.36368966e-01,
    3.42600285e-01, 5.64505195e-01, 5.57594559e-01, 7.44257892e-01, 8.38231569e-02, 4.11548847e-01,
    3.21010077e-01, 8.55081359e-01, 4.30105779e-01, 1.16229135e-01, 9.87731964e-02, 3.14712335e-01,
    4.50880592e-01, 2.72289598e-01, 6.31615256e-01, 8.97432958e-01, 4.44764250e-01, 8.03776440e-01,
    2.68767748e-02, 2.43374608e-01, 4.02141103e-01, 4.98881209e-01, 5.33173003e-01, 8.82890436e-01,
    7.16149148e-01, 4.19664401e-01, 2.29335357e-01, 2.88637806e-01, 3.44696803e-01, 6.78171906e-01,
    5.69849716e-01, 5.86454477e-01, 3.54474989e-01, 9.03876540e-01, 6.45980000e-01, 6.34887593e-01,
    7.88039746e-02, 2.04814126e-01, 7.82251754e-01, 2.43147074e-01, 7.50951808e-01, 1.72799092e-02,
    2.95349590e-01, 6.57991826e-01, 8.81214312e-01, 5.73970708e-01, 2.77610881e-01, 1.82155097e-01,
    7.69797417e-02, 6.44792402e-01, 9.46950998e-01, 7.73064845e-01, 6.04733624e-01, 5.80094567e-01,
    1.67498426e-01, 2.66514296e-01, 6.50140368e-01, 1.91170299e-01, 2.08752199e-01, 3.01664091e-01,
    9.85033484e-01, 2.92909152e-01, 8.65816607e-01, 1.85222119e-01, 2.28814559e-01, 1.34286382e-02,
    2.89234322e-01, 8.18668708e-01, 4.71706924e-01, 9.23199803e-01, 2.80879188e-01, 1.47319284e-01,
    4.13915748e-01, 9.31274932e-02, 6.66322195e-01, 9.66953974e-01, 3.19405786e-01, 6.69486551e-01,
    5.03096313e-02, 6.95225201e-01, 5.78469859e-01, 6.29481655e-01, 1.39252534e-01, 1.22564968e-01,
    6.80663678e-01, 6.34607157e-01, 6.42765834e-01, 1.57127410e-02, 2.92132086e-01, 5.24423878e-01,
    4.68676824e-01, 2.86003928e-01, 7.18608322e-01, 8.95617933e-01, 5.48844309e-01, 1.74517278e-01,
    5.24379196e-01, 2.13526524e-01, 5.88375435e-01, 9.88560185e-01, 4.17435771e-01, 6.14438688e-01,
    9.53760881e-01, 5.27151288e-01, 7.03017278e-01, 3.44448559e-01, 4.47059676e-01, 2.83414901e-01,
    1.98979011e-01, 4.24917361e-01, 5.73172761e-01, 2.32398853e-02, 1.65887230e-01, 4.05552785e-01,
    9.29665524e-01, 2.26135696e-01, 9.20563384e-01, 7.65259963e-01, 4.54820075e-01, 8.97710267e-01,
    3.78559302e-03, 9.15219382e-01, 3.55705698e-01, 6.94905124e-01, 8.58540202e-01, 3.89790666e-01,
    2.49478206e-01, 7.93679304e-01, 4.75830027e-01, 4.40425353e-01, 3.70579459e-01, 1.40578049e-01,
    1.70386675e-01, 7.04056121e-01, 4.85963102e-01, 9.68450060e-01, 6.77178001e-01, 2.65934654e-01,
    2.58915007e-01, 6.70052890e-01, 2.61945109e-01, 8.46207759e-01, 1.01928951e-01, 2.85611334e-01,
    2.45776933e-01, 2.66658783e-01, 3.71724077e-01, 4.34319025e-01, 4.24407347e-01, 7.15417683e-01,
    8.07997684e-01, 1.64296275e-01, 6.01638065e-01, 8.60606804e-02, 2.68719187e-01, 5.11764101e-01,
    9.75844338e-01, 7.81226782e-01, 2.20925515e-01, 7.18135040e-01, 9.82395577e-01, 8.39160243e-01,
    9.08058083e-01, 6.88010677e-01, 8.14271847e-01, 5.12460821e-01, 1.17311345e-01, 5.96075228e-01,
    9.17455497e-01, 2.12052706e-01, 7.04074603e-01, 8.72872565e-02, 8.76047818e-01, 6.96235046e-01,
    8.54801557e-01, 2.49729159e-01, 9.76594604e-01, 2.87386363e-01, 2.36461559e-02, 9.94075254e-01,
    4.25193986e-01, 7.61869994e-01, 5.13334255e-01, 6.44711165e-02, 8.92156689e-01, 3.55235167e-01,
    1.08154647e-01, 8.78446825e-01, 2.43833016e-01, 9.23071293e-01, 2.72724115e-01, 9.46631338e-01,
    3.74510294e-01, 4.08451278e-02, 9.78392777e-01, 3.65079221e-01, 6.37199516e-01, 5.51144906e-01,
    5.25978080e-01, 1.42803678e-01, 4.05451674e-01, 7.79788219e-01, 6.26009784e-01, 3.35249497e-01,
    1.43159543e-02, 1.80363779e-01, 5.05096904e-01, 2.82619947e-01, 5.83561392e-01, 3.10951324e-01,
    8.73223968e-01, 4.38545619e-01, 4.81348800e-01, 6.68497085e-01, 3.79345401e-01, 9.58832501e-01,
    1.89869550e-01, 2.34083070e-01, 2.94066207e-01, 5.74892667e-02, 6.92106828e-02, 9.61127686e-02,
    6.72650672e-02, 8.47345378e-01, 2.80916761e-01, 7.32177357e-03, 9.80785961e-01, 5.73192225e-02,
    8.48781331e-01, 8.83225408e-01, 7.34398275e-01, 7.70381941e-01, 6.20778343e-01, 8.96822048e-01,
    5.40732486e-01, 3.69704071e-01, 5.77305837e-01, 2.08221827e-01, 7.34275341e-01, 1.06110900e-01,
    3.49496706e-01, 8.34948910e-01, 1.56403291e-02, 6.78576376e-01, 8.96141268e-01, 5.94835119e-01,
    1.43943153e-01, 3.49618530e-01, 2.10440392e-01, 3.46585620e-01, 1.05153093e-01, 3.45446174e-01,
    2.72177079e-01, 7.07946300e-01, 4.33717726e-02, 3.31232203e-01, 3.91874320e-01, 4.76338141e-01,
    6.22777789e-01, 2.95989228e-02, 4.32855769e-01, 7.61049310e-01, 3.63279149e-01, 9.47210350e-01,
    6.43721247e-01, 6.58025802e-01, 1.05247633e-02, 5.29974442e-01, 7.30675767e-01, 4.30041079e-01,
    6.62634841e-01, 8.25936616e-01, 9.91253704e-01, 6.79399281e-01, 5.44177006e-01, 7.52876048e-01,
    3.32139049e-01, 7.98732398e-01, 7.38865223e-01, 9.16055132e-01, 6.11736493e-01, 9.63672879e-01,
    1.83778839e-01, 7.27558919e-02, 5.91602822e-01, 3.25235484e-01, 2.34741217e-01, 9.52346277e-01,
    9.18556407e-01, 9.35373324e-01, 6.89209070e-01, 2.56049054e-01, 6.17975395e-01, 7.82285691e-01,
    9.84983432e-01, 6.62322741e-01, 2.04144457e-01, 3.98446577e-01, 1.38918297e-01, 3.05919921e-01,
    3.14043787e-01, 5.91072666e-01, 7.44703771e-01, 8.92272567e-01, 9.78017873e-01, 9.01203161e-01,
    1.41526372e-01, 4.14878484e-01, 6.80683651e-01, 5.01733152e-02, 8.14635389e-01, 2.27926375e-01,
    9.03269815e-01, 8.68443745e-01, 9.86939190e-01, 7.40779486e-01, 2.61005311e-01, 3.19276232e-01,
    9.69509248e-01, 1.11908818e-01, 4.49198556e-01, 1.27056715e-01, 3.84064823e-01, 5.14591811e-01,
    2.10747488e-01, 9.53884090e-01, 8.43167950e-01, 4.51187972e-01, 3.75331782e-01, 6.23566461e-01,
    3.55290379e-01, 2.95705968e-01, 1.69622690e-01, 1.42981830e-01, 2.72180991e-01, 9.46468040e-01,
    3.70932500e-01, 9.94292830e-01, 4.62587505e-01, 7.14817405e-01, 2.45370540e-02, 3.00906377e-01,
    5.75768304e-01, 9.71448393e-01, 6.95574827e-02, 3.93693854e-01, 5.29306116e-01, 5.04694554e-01,
    6.73797120e-02, 6.76596969e-01, 5.50948898e-01, 3.24909641e-01, 7.70337719e-01, 6.51842631e-03,
    3.03264879e-01, 7.61037886e-03, 2.72289601e-01, 1.50502041e-01, 6.71103888e-02, 7.41503703e-01,
    1.92088941e-01, 2.19043977e-01, 9.09320161e-01, 2.37993569e-01, 6.18107973e-02, 8.31447852e-01,
    2.23355609e-01, 1.84789435e-01, 4.16104518e-01, 4.21573859e-01, 8.72446305e-02, 2.97294197e-01,
    4.50328256e-01, 8.72199917e-01, 2.51279916e-01, 4.86219272e-01, 7.57071329e-01, 4.85655942e-01,
    1.06187277e-01, 4.92341327e-01, 1.46017513e-01, 5.25421017e-01, 4.22637906e-01, 2.24685018e-01,
    8.72648431e-01, 5.54051490e-01, 1.80745062e-01, 2.12756336e-01, 5.20883169e-01, 7.60363654e-01,
    8.30254678e-01, 5.00003328e-01, 4.69017439e-01, 6.38105527e-01, 3.50638261e-02, 5.22217353e-02,
    9.06516882e-02, 8.52975842e-01, 1.19985883e-01, 3.74926753e-01, 6.50302066e-01, 1.98875727e-01,
    6.28362507e-02, 4.32693501e-01, 3.10500685e-01, 6.20732833e-01, 4.58503272e-01, 3.20790034e-01,
    7.91284868e-01, 7.93054570e-01, 2.93406765e-01, 8.95399023e-01, 1.06441034e-01, 7.53085241e-02,
    8.67523104e-01, 1.47963482e-01, 1.25584706e-01, 3.81545040e-02, 6.34338619e-01, 1.76368938e-02,
    5.75553531e-02, 5.31607516e-01, 2.63869588e-01, 9.41945823e-01, 9.24028838e-02, 5.21496463e-01,
    7.74866558e-01, 5.65210610e-01, 7.28015327e-02, 6.51963790e-01, 8.94727453e-01, 4.49571590e-01,
    1.29932405e-01, 8.64026259e-01, 9.92599934e-01, 7.43721560e-01, 8.87300215e-01, 1.06369925e-01,
    8.11335531e-01, 7.87734900e-01, 9.87344678e-01, 5.32502820e-01, 4.42612382e-01, 9.64041183e-01,
    1.66085871e-01, 1.12937664e-01, 5.24423470e-01, 6.54689333e-01, 4.59119726e-01, 5.22774091e-01,
    3.08722276e-02, 6.26979315e-01, 4.49754105e-01, 8.07495757e-01, 2.34199499e-01, 1.67765675e-01,
    9.22168418e-01, 3.73210378e-01, 8.04432575e-01, 5.61890354e-01, 4.47025593e-01, 6.43155678e-01,
    2.40407640e-01, 5.91631279e-01, 1.59369206e-01, 7.75799090e-01, 8.32067212e-01, 5.59791576e-02,
    6.39105224e-01, 4.85274738e-01, 2.12630838e-01, 2.81431312e-02, 7.16205363e-01, 6.83885011e-01,
    5.23869697e-01, 9.99418314e-01, 8.35331599e-01, 4.69877463e-02, 6.74712562e-01, 7.99273684e-01,
    2.77001890e-02, 5.75809742e-01, 2.78513031e-01, 8.36209905e-01, 7.25472379e-01, 4.87173943e-01,
    7.88311357e-01, 9.64676177e-01, 1.75752651e-01, 4.98112580e-01, 8.08850418e-02, 6.40981131e-01,
    4.06647450e-01, 8.46539387e-01, 2.12620694e-01, 9.11012851e-01, 8.25041445e-01, 8.90065575e-01,
    9.63626055e-01, 5.96689242e-01, 1.63372670e-01, 4.51640148e-01, 3.43026542e-01, 5.80658851e-01,
    2.82327625e-01, 4.75535418e-01, 6.27760926e-01, 8.46314115e-01, 9.61961932e-01, 3.19806094e-01,
    5.05508062e-01, 5.28102944e-01, 6.13045057e-01, 7.44714938e-01, 1.50586073e-01, 7.91878033e-01,
    4.89839179e-01, 3.10496849e-01, 8.82309038e-01, 2.86922314e-01, 4.84687559e-01, 5.20838630e-01,
    4.62955493e-01, 2.38185305e-01, 5.47259907e-02, 7.10916137e-01, 7.31887202e-01, 6.25602317e-01,
    8.77741168e-01, 4.19881322e-01, 4.81222328e-01, 1.28224501e-01, 2.46034010e-01, 3.34971854e-01,
    7.37216484e-01, 5.62134821e-02, 7.14089724e-01, 9.85549393e-01, 4.66295827e-01, 3.08722434e-03,
    4.70237690e-01, 2.66524167e-01, 7.93875484e-01, 4.54795911e-02, 8.09702944e-01, 1.47709735e-02,
    1.70082405e-01, 6.35905179e-01, 3.75379109e-01, 4.30315011e-01, 3.15788760e-01, 5.58065230e-01,
    2.24643800e-01, 2.42142981e-01, 6.57283636e-01, 3.34921891e-01, 1.26588975e-01, 7.68064155e-01,
    9.43856291e-01, 4.47518596e-01, 5.44453573e-01, 9.95764932e-01, 7.16444391e-01, 8.51019765e-01,
    1.01179183e-01, 4.45473958e-01, 4.60327322e-01, 4.96895844e-02, 4.72907738e-01, 5.58987444e-01,
    3.41027487e-01, 1.56175026e-01, 7.58283148e-01, 6.83600909e-01, 2.14623396e-01, 3.27348880e-01,
    3.92517893e-01, 6.70418431e-01, 5.16440832e-01, 8.63140348e-01, 5.73277464e-01, 3.46608058e-01,
    7.39396341e-01, 7.20852434e-01, 2.35653246e-02, 3.89935659e-01, 7.53783745e-01, 6.34563528e-01,
    8.79339335e-01, 7.41599159e-02, 5.62433904e-01, 6.15553852e-01, 4.56956324e-01, 5.20047447e-01,
    5.26845015e-02, 5.58471266e-01, 1.63632233e-01, 5.38936665e-02, 6.49593683e-01, 2.56838748e-01,
    8.99035326e-01, 7.20847756e-01, 5.68954684e-01, 7.43684755e-01, 5.70924238e-01, 3.82318724e-01,
    4.89328290e-01, 5.62208561e-01, 4.97540804e-02, 4.18011085e-01, 6.88041565e-01, 2.16234653e-01,
    7.89548214e-01, 8.46136387e-01, 8.46816189e-01, 1.73842353e-01, 6.11627842e-02, 8.44440559e-01,
    4.50646654e-01, 3.74785037e-01, 4.87196697e-01, 4.56276448e-01, 9.13284391e-01, 4.15715464e-01,
    7.13597697e-01, 1.23641270e-02, 5.10031271e-01, 4.74601930e-02, 2.55731159e-01, 3.22090006e-01,
    1.91165703e-01, 4.51170940e-01, 7.50843157e-01, 4.42420576e-01, 4.25380660e-01, 4.50667257e-01,
    6.55689206e-01, 9.68257670e-02, 1.96528793e-01, 8.97343028e-01, 4.99940904e-01, 6.65504083e-01,
    9.41828079e-01, 4.54397338e-01, 5.61893331e-01, 5.09839880e-01, 4.53117514e-01, 8.96804127e-02,
    1.74888861e-01, 6.65641378e-01, 2.81668336e-01, 1.89532742e-01, 5.61668382e-01, 8.68330157e-02,
    8.25092797e-01, 5.18106324e-01, 1.71904024e-01, 3.68385523e-01, 1.62005436e-01, 7.48507399e-01,
    9.30274827e-01, 2.38198517e-01, 9.52222901e-01, 5.23587800e-01, 6.94384557e-01, 1.09338652e-01,
    4.83356794e-01, 2.73050402e-01, 3.68027050e-01, 5.92366466e-01, 1.83192289e-01, 8.60376029e-01,
    7.13926203e-01, 8.16750052e-01, 1.57890291e-01, 6.25691951e-01, 5.24831646e-01, 1.73873797e-01,
    1.02429784e-01, 9.17488471e-01, 4.03584434e-01, 9.31170884e-01, 2.79386137e-01, 8.77745206e-01,
    2.45200576e-01, 1.28896951e-01, 3.15713052e-01, 5.27874291e-01, 2.16444335e-01, 7.03883817e-01,
    7.74738919e-02, 8.42422142e-01, 3.75598924e-01, 3.51002411e-01, 6.22752776e-01, 4.82407943e-01,
    7.43107867e-01, 9.46182666e-01, 9.44344819e-01, 3.28124763e-01, 1.06147431e-01, 1.65102684e-01,
    3.84060507e-01, 2.91057722e-01, 7.68173662e-02, 1.03543651e-01, 6.76698940e-01, 1.43141994e-01,
    7.21342202e-01, 6.69471294e-03, 9.07298311e-01, 5.57080171e-01, 8.10954489e-01, 4.11120526e-01,
    2.06407453e-01, 2.59590556e-01, 7.58512718e-01, 5.79873897e-01, 2.92875650e-01, 2.83686529e-01,
    2.42829343e-01, 9.19323719e-01, 3.46832864e-01, 3.58238858e-01, 7.42827585e-01, 2.05760059e-01,
    9.58438860e-01, 5.66326411e-01, 6.60292846e-01, 5.61095078e-02, 6.79465531e-01, 7.05118513e-01,
    4.44713264e-01, 2.09732933e-01, 5.22732436e-01, 1.74396512e-01, 5.29356748e-01, 4.38475687e-01,
    4.94036404e-01, 4.09785794e-01, 6.40025507e-01, 5.79371821e-01, 1.57726118e-01, 6.04572263e-01,
    5.41072639e-01, 5.18847173e-01, 1.97093284e-01, 8.91767002e-01, 4.29050835e-01, 8.25490570e-01,
    3.87699807e-01, 4.50705808e-01, 2.49371643e-01, 3.36074898e-01, 9.29925118e-01, 6.65393649e-01,
    9.07275994e-01, 3.73075859e-01, 4.14044139e-03, 2.37463702e-01, 2.25893784e-01, 2.46900245e-01,
    4.50350196e-01, 3.48618117e-01, 5.07193932e-01, 5.23435142e-01, 8.13611417e-01, 8.92715622e-01,
    1.02623450e-01, 3.06088345e-01, 7.80461650e-01, 2.21453645e-01, 2.01419652e-01, 2.84254457e-01,
    3.68286735e-01, 7.39358243e-01, 8.97879394e-01, 9.81599566e-01, 7.56526442e-01, 7.37645545e-01,
    4.23976657e-02, 8.25922012e-01, 2.60956996e-01, 2.90702065e-01, 8.98388344e-01, 3.03733299e-01,
    8.49071471e-01, 3.45835425e-01, 7.65458276e-01, 5.68094872e-01, 8.93770930e-01, 9.93161641e-01,
    5.63368667e-02, 4.26548945e-01, 5.46745780e-01, 5.75674571e-01, 7.94599487e-01, 7.18935553e-02,
    4.46492976e-01, 6.40240123e-01, 2.73246969e-01, 2.00465968e-01, 1.30718835e-01, 1.92492005e-01,
    1.96617189e-01, 6.61271644e-01, 8.12687657e-01, 8.66342445e-01

   },
   -4}};

typedef ConnectComponentsTest<int, float> ConnectComponentsTestF_Int;
TEST_P(ConnectComponentsTestF_Int, Result)
{
  /**
   * Verify the src & dst vertices on each edge have different colors
   */
  EXPECT_TRUE(final_edges == params.n_row - 1);
}

INSTANTIATE_TEST_CASE_P(ConnectComponentsTest,
                        ConnectComponentsTestF_Int,
                        ::testing::ValuesIn(fix_conn_inputsf2));

template <typename value_t, typename value_idx>
struct ConnectComponentsMutualReachabilityInputs {
  value_idx n_row;
  value_idx n_col;
  std::vector<value_t> data;
  std::vector<value_t> core_dists;
  std::vector<value_idx> colors;
  std::vector<value_idx> expected_rows;
  std::vector<value_idx> expected_cols;
  std::vector<value_t> expected_vals;
};

template <typename value_idx, typename value_t>
class ConnectComponentsEdgesTest
  : public ::testing::TestWithParam<ConnectComponentsMutualReachabilityInputs<value_t, value_idx>> {
 protected:
  void basicTest()
  {
    raft::resources handle;

    auto stream = raft::resource::get_cuda_stream(handle);

    params = ::testing::TestWithParam<
      ConnectComponentsMutualReachabilityInputs<value_t, value_idx>>::GetParam();

    raft::sparse::COO<value_t, value_idx> out_edges_unbatched(
      raft::resource::get_cuda_stream(handle));
    raft::sparse::COO<value_t, value_idx> out_edges_batched(
      raft::resource::get_cuda_stream(handle));

    rmm::device_uvector<value_t> data(params.n_row * params.n_col,
                                      raft::resource::get_cuda_stream(handle));
    rmm::device_uvector<value_t> core_dists(params.n_row, raft::resource::get_cuda_stream(handle));
    rmm::device_uvector<value_idx> colors(params.n_row, raft::resource::get_cuda_stream(handle));

    raft::copy(
      data.data(), params.data.data(), data.size(), raft::resource::get_cuda_stream(handle));
    raft::copy(core_dists.data(),
               params.core_dists.data(),
               core_dists.size(),
               raft::resource::get_cuda_stream(handle));
    raft::copy(
      colors.data(), params.colors.data(), colors.size(), raft::resource::get_cuda_stream(handle));

    /**
     * 3. cross_component_nn to fix connectivities
     */
    cuvs::sparse::neighbors::MutualReachabilityFixConnectivitiesRedOp<value_idx, value_t> red_op(
      core_dists.data(), params.n_row);

    cuvs::sparse::neighbors::cross_component_nn<value_idx, value_t>(handle,
                                                                    out_edges_unbatched,
                                                                    data.data(),
                                                                    colors.data(),
                                                                    params.n_row,
                                                                    params.n_col,
                                                                    red_op,
                                                                    params.n_row,
                                                                    params.n_col);

    cuvs::sparse::neighbors::cross_component_nn<value_idx, value_t>(handle,
                                                                    out_edges_batched,
                                                                    data.data(),
                                                                    colors.data(),
                                                                    params.n_row,
                                                                    params.n_col,
                                                                    red_op,
                                                                    11,
                                                                    1);

    ASSERT_TRUE(out_edges_unbatched.nnz == out_edges_batched.nnz &&
                out_edges_unbatched.nnz == params.expected_rows.size());

    ASSERT_TRUE(devArrMatch(out_edges_unbatched.rows(),
                            params.expected_rows.data(),
                            out_edges_unbatched.nnz,
                            Compare<int>()));

    ASSERT_TRUE(devArrMatch(out_edges_unbatched.cols(),
                            params.expected_cols.data(),
                            out_edges_unbatched.nnz,
                            Compare<int>()));

    ASSERT_TRUE(devArrMatch(out_edges_unbatched.vals(),
                            params.expected_vals.data(),
                            out_edges_unbatched.nnz,
                            CompareApprox<float>(1e-4)));

    ASSERT_TRUE(devArrMatch(out_edges_batched.rows(),
                            params.expected_rows.data(),
                            out_edges_batched.nnz,
                            Compare<int>()));

    ASSERT_TRUE(devArrMatch(out_edges_batched.cols(),
                            params.expected_cols.data(),
                            out_edges_batched.nnz,
                            Compare<int>()));

    ASSERT_TRUE(devArrMatch(out_edges_batched.vals(),
                            params.expected_vals.data(),
                            out_edges_batched.nnz,
                            CompareApprox<float>(1e-4)));
  }

  void SetUp() override { basicTest(); }

  void TearDown() override {}

 protected:
  ConnectComponentsMutualReachabilityInputs<value_t, value_idx> params;
};

const std::vector<ConnectComponentsMutualReachabilityInputs<float, int>> mr_fix_conn_inputsf2 = {
  {100,
   2,
   {-7.72642, -8.39496, 5.4534,   0.742305, -2.97867, 9.55685,   6.04267,  0.571319,   -6.52184,
    -6.31932, 3.64934,  1.40687,  -2.17793, 9.98983,  4.42021,   2.33028,  4.73696,    2.94181,
    -3.66019, 9.38998,  -3.05358, 9.12521,  -6.65217, -5.57297,  -6.35769, -6.58313,   -3.61553,
    7.81808,  -1.77073, 9.18565,  -7.95052, -6.39764, -6.60294,  -6.05293, -2.58121,   10.0178,
    -7.76348, -6.72638, -6.40639, -6.95294, -2.97262, 8.54856,   -6.95673, -6.53896,   -7.32614,
    -6.02371, -2.1478,  10.5523,  -2.54502, 10.5789,  -2.96984,  10.0714,  3.22451,    1.55252,
    -6.25396, -7.73727, -7.85431, -6.09303, -8.11658, -8.20057,  -7.55965, -6.64786,   4.936,
    2.23423,  4.44752,  2.27472,  -5.72103, -7.70079, -0.929985, 9.78172,  -3.10984,   8.72259,
    -2.44167, 7.58954,  -2.18511, 8.6292,   5.55528,  2.30192,   4.73164,  -0.0143992, -8.2573,
    -7.81793, -2.98837, 8.82863,  4.60517,  0.804492, -3.83738,  9.21115,  -2.62485,   8.71318,
    3.57758,  2.44676,  -8.48711, -6.69548, -6.70645, -6.49479,  -6.86663, -5.42658,   3.83139,
    1.47141,  2.02013,  2.79507,  4.64499,  1.73858,  -1.69667,  10.3705,  -6.61974,   -6.09829,
    -6.05757, -4.98332, -7.10309, -6.16611, -3.52203, 9.32853,   -2.26724, 7.10101,    6.11777,
    1.4549,   -4.23412, 8.452,    -6.58655, -7.59446, 3.93783,   1.64551,  -7.12502,   -7.63385,
    2.72111,  1.94666,  -7.14428, -4.15994, -6.66553, -8.12585,  4.70011,  4.43641,    -7.76914,
    -7.69592, 4.11012,  2.48644,  4.89743,  1.89872,  4.29716,   1.17089,  -6.62913,   -6.53366,
    -8.07093, -6.22356, -2.16558, 7.25125,  4.73953,  1.46969,   -5.91625, -6.46733,   5.43091,
    1.06378,  -6.82142, -8.02308, 6.52606,  2.14775,  3.08922,   2.04173,  -2.14756,   8.36917,
    3.85663,  1.65111,  -1.68665, 7.79344,  -5.01385, -6.40628,  -2.52269, 7.95658,    -2.30033,
    7.05462,  -1.04355, 8.78851,  3.72045,  3.5231,   -3.98772,  8.29444,  4.24777,    0.509655,
    4.72693,  1.67416,  5.7827,   2.7251,   -3.41722, 7.60198,   5.22674,  4.16363,    -3.1109,
    10.8666,  -3.18612, 9.62596,  -1.4782,  9.94557,  4.47859,   2.37722,  -5.79658,   -5.82631,
    -3.34842, 8.70507},
   {0.978428, 1.01917,  0.608673, 1.45629,  0.310713, 0.689461, 0.701126, 0.63296,  0.774788,
    0.701648, 0.513282, 0.757651, 0.45638,  0.973111, 0.901396, 0.613692, 0.482497, 0.688143,
    0.72428,  0.666345, 0.58232,  0.554756, 0.710315, 0.903611, 0.694115, 0.796099, 0.639759,
    0.798998, 0.639839, 1.30727,  0.663729, 0.57476,  0.571348, 1.14662,  1.26518,  0.485068,
    0.78207,  0.791621, 1.01678,  1.28509,  1.14715,  0.381395, 0.850507, 0.788511, 0.588341,
    0.878516, 0.928669, 0.405874, 0.776421, 0.612274, 1.84963,  0.57476,  0.95226,  0.488078,
    1.24868,  0.515136, 0.589378, 0.903632, 1.01678,  1.09964,  0.666345, 0.713265, 0.877168,
    1.10053,  1.96887,  1.03574,  2.03728,  0.969553, 0.774788, 0.586338, 0.65168,  0.435472,
    0.664396, 0.790584, 0.678637, 0.715964, 0.865494, 0.978428, 1.59242,  0.861109, 0.833259,
    0.65168,  0.903632, 1.49599,  0.76347,  0.960453, 1.1848,   1.37398,  0.928957, 1.07848,
    0.661798, 1.21104,  1.04579,  1.89047,  1.24288,  0.529553, 0.903611, 0.620897, 0.882467,
    0.647189},
   {0, 1, 2, 1, 0, 1, 2, 1, 1, 2, 2, 0, 0, 2, 2, 0, 0, 2, 0, 0, 2, 0, 0, 2, 2,
    2, 1, 0, 0, 0, 0, 1, 1, 0, 2, 2, 2, 2, 1, 1, 0, 2, 1, 2, 2, 1, 0, 0, 0, 1,
    1, 1, 2, 0, 0, 0, 2, 2, 1, 2, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 2, 1,
    0, 1, 0, 1, 1, 2, 1, 2, 0, 2, 2, 2, 1, 2, 1, 1, 1, 2, 1, 2, 2, 2, 1, 0, 2},
   {50, 54, 57, 63, 82, 87},
   {57, 63, 50, 54, 87, 82},
   {6.0764, 11.1843, 6.0764, 11.1843, 6.89004, 6.89004}},
  {1000,
   2,
   {-6.59634,  -7.13901,  -6.13753,  -6.58082, 5.19821,    2.04918,     -2.96856,  8.16444,
    -2.76879,  7.51114,   -6.82261,  -6.61152, 5.02008,    2.58376,     5.55621,   2.31966,
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    0.2766,    0.38664,  0.135034, 1.50827,   0.472527, 0.268418,  0.40383,  0.375914,  0.246496,
    0.176474,  0.340405, 0.220833, 0.138782,  0.159009, 0.444219,  0.259582, 0.33638,   0.195586,
    0.210974,  0.200288, 0.148129, 0.0974216, 0.211588, 0.280081,  0.44113,  0.773921,  0.553848,
    0.448079,  0.183136, 0.380854, 0.685021,  0.308767, 0.553276,  0.181578, 0.164759,  0.313889,
    0.137886,  0.545387, 0.278449, 0.736895,  0.360054, 0.358929,  0.457315, 0.343278,  0.507662,
    0.280829,  0.113886, 0.23146,  0.160584,  0.192796, 0.147561,  0.241272, 0.168988,  0.730511,
    0.27836,   0.179847, 0.22555,  0.418069,  0.158348, 0.128965,  0.179454, 0.126366,  0.164434,
    0.273633,  0.309556, 0.500823, 0.367852,  0.192875, 0.230262,  0.32724,  0.249969,  0.142618,
    0.494229,  0.36108,  0.227931, 0.23113,   0.742825, 0.190126,  0.33741,  0.280598,  0.145268,
    0.378423,  0.211921, 0.183594, 0.59201,   0.279563, 0.195683,  0.248101, 0.199754,  0.342494,
    0.174343,  0.14149,  0.28085,  0.175781,  0.518738, 0.17223,   0.489904, 0.181167,  0.354286,
    0.297824,  0.280829, 0.219412, 0.22814,   0.195625, 0.313949,  0.294708, 0.211551,  0.236255,
    0.666933,  0.204808, 0.52591,  0.180725,  0.186889, 0.246589,  0.410575, 0.338348,  0.206219,
    0.361766,  0.158143, 0.280816, 0.4149,    0.773082, 0.340046,  0.369672, 0.256923,  0.167195,
    0.197217,  0.252339, 0.172716, 0.191526,  0.263085, 0.345698,  0.168286, 0.243099,  0.434631,
    0.22944,   0.161862, 0.206589, 0.23457,   0.181924, 0.419063,  0.183427, 0.186152,  0.236352,
    0.306336,  0.149002, 1.50086,  0.188231,  0.442757, 0.485602,  0.466662, 0.17329,   0.141329,
    0.180619,  0.160061, 0.192569, 0.270999,  0.117901, 0.362693,  0.217561, 0.208975,  0.233658,
    0.175173,  1.10307,  0.14625,  1.31124,   0.237608, 0.286784,  0.325112, 0.2485,    0.259641,
    0.553152,  0.179039, 0.780781, 0.174758,  0.297824, 0.2558,    0.235949, 0.952186,  0.356744,
    0.312646,  0.189362, 0.574524, 0.705204,  0.213168, 0.225956,  0.424165, 0.169506,  0.137109,
    0.352451,  0.454554, 0.653302, 0.31261,   0.194412, 0.23719,   0.137886, 0.31498,   0.199085,
    0.203875,  0.597248, 1.10036,  0.196869,  0.22104,  0.451345,  0.105613, 0.683928,  0.135204,
    0.25533,   0.607871, 0.219724, 0.184464,  0.725001, 0.160061,  0.333407, 0.192569,  0.234147,
    0.47178,   0.161815, 0.242455, 0.215305,  0.410575, 0.242376,  0.211335, 0.462804,  0.275065,
    0.126878,  0.170404, 0.179433, 0.147244,  0.109584, 0.352905,  0.158215, 0.197604,  0.172407,
    0.407506,  0.645446, 0.313061, 0.165602,  0.136663, 0.55444,   0.15527,  0.133128,  0.125912,
    0.340405,  0.44521,  0.122783, 0.814526,  0.243773, 0.15743,   0.266743, 0.684458,  0.22221,
    0.181294,  0.193901, 0.258802, 0.167195,  0.292056, 0.132309,  0.227671, 0.117334,  0.271758,
    0.146185,  0.225042, 0.225964, 0.194863,  0.290274, 0.138438,  0.196714, 0.266012,  0.267771,
    0.162544,  0.244258, 0.358038, 0.522617,  0.192875, 0.45066,   0.330396, 0.223477,  0.42967,
    0.350884,  0.404655, 0.123155, 0.431583,  0.191675, 0.147354,  0.609034, 0.459487,  0.187337,
    0.215128,  0.604169, 0.330165, 0.494229,  0.40775,  0.167377,  0.192648, 0.234635,  0.275578,
    0.253094,  0.420063, 0.228299, 0.206478,  0.20395,  0.377656,  0.317393, 0.478623,  0.159009,
    0.217034,  0.300933, 0.139754, 0.153901,  0.261077, 0.22834,   0.449609, 0.157672,  0.176474,
    0.285704,  0.180186, 0.212738, 0.266428,  0.388313, 0.0954637, 0.298093, 0.251643,  0.330696,
    0.159572,  0.210666, 0.149411, 0.139618,  0.338472, 0.450304,  0.208793, 0.583609,  0.185865,
    0.400576,  0.21626,  0.174867, 0.239144,  0.249113, 0.200402,  0.275065, 0.238793,  0.205784,
    0.4475,    0.231262, 0.259082, 0.20934,   0.16806,  0.193616,  0.213811, 0.395632,  0.482465,
    0.274649,  0.307405, 0.165866, 0.334275,  0.683337, 0.368825,  0.14625,  0.780742,  0.163457,
    0.226596,  0.138713, 1.79155,  0.400443,  0.233658, 0.426399,  0.623024, 0.670955,  0.123588,
    0.110899,  0.173751, 0.651068, 0.199983,  0.190887, 0.541435,  0.21324,  0.266571,  0.134638,
    0.179348,  0.145636, 0.170929, 0.623252,  0.587738, 0.109688,  0.515314, 0.217666,  0.213311,
    0.249144,  0.187947, 0.270999, 0.268311,  0.469782, 0.763609,  0.32124,  0.146315,  0.265223,
    0.298694,  0.197623, 0.21349,  0.845778,  0.175466, 0.123588,  0.17223,  0.258603,  1.17119,
    0.538142,  0.407675, 0.120288, 0.587238,  0.244664, 0.333956,  0.132812, 0.21399,   0.302375,
    0.275882,  0.134284, 0.377555, 0.228541,  0.187307, 0.143804,  0.180545, 0.222451,  0.239638,
    0.188028,  0.46334,  0.175868, 0.242392,  0.314762, 0.44473,   0.21962,  0.175966,  1.12364,
    0.138837,  0.400576, 0.18184,  0.137706,  0.409763, 0.216894,  0.466662, 0.376604,  0.487155,
    0.283143,  0.118547, 0.221591, 0.122783,  0.179007, 0.16628,   0.180999, 0.239845,  0.169607,
    0.578402,  0.396537, 0.222288, 0.563237,  0.371238, 0.138658,  0.324336, 0.191526,  0.168603,
    0.357715,  0.640905, 0.460706, 0.220902,  0.240797, 0.164062,  0.157853, 0.34457,   0.196092,
    0.289353,  0.104597, 0.259641, 0.126878,  0.175781, 0.441458,  0.820108, 0.261864,  0.23431,
    0.254506,  0.271955, 0.227529, 0.22834,   0.196753, 0.224906,  0.193783, 0.419481,  0.236933,
    0.229706,  0.29785,  0.222947, 0.177606,  0.216911, 0.305188,  0.933438, 0.116666,  0.278483,
    0.0973824, 0.271224, 0.127717, 1.28139,   0.276283, 0.180704,  0.234554, 0.285984,  0.290172,
    0.49594,   0.135879, 0.436784, 0.206219,  0.342215, 0.374165,  0.182217, 0.274864,  0.625,
    0.356925,  0.194324, 0.342215, 0.113012,  0.155123, 0.254207,  0.438919, 0.262548,  0.302299,
    0.179528,  0.312744, 0.168513, 0.142618,  0.150543, 0.231361,  0.166004, 0.186725,  0.38848,
    0.179857,  0.182301, 0.629476, 0.44113,   0.289669, 0.328543,  0.279938, 0.14625,   0.187174,
    0.157635,  0.396749, 0.798931, 0.201541,  0.778619, 0.265883,  0.258027, 0.218576,  0.266571,
    0.160168,  0.230303, 0.273633, 0.233298,  0.30175,  0.217069,  0.345145, 0.397901,  0.224499,
    0.248101,  0.241335, 0.222947, 0.237094,  0.176518, 0.380032,  0.634775, 0.426193,  0.16362,
    0.231097,  0.219898, 0.343789, 0.275578,  0.282022, 0.628542,  0.232184, 0.848367,  0.200754,
    0.179177},
   {0, 0, 2, 3, 3, 0, 2, 2, 2, 2, 3, 0, 3, 2, 2, 2, 3, 3, 3, 3, 2, 0, 0, 0, 2, 3, 3, 3, 2, 2, 0, 0,
    2, 3, 3, 0, 0, 2, 0, 0, 3, 2, 3, 0, 3, 0, 3, 3, 0, 2, 0, 3, 2, 0, 3, 0, 3, 3, 3, 2, 2, 3, 0, 0,
    3, 3, 0, 2, 2, 3, 0, 3, 2, 2, 2, 0, 2, 3, 3, 3, 2, 3, 3, 3, 2, 0, 2, 0, 3, 3, 3, 3, 2, 2, 0, 2,
    0, 3, 2, 2, 2, 0, 0, 3, 0, 2, 2, 3, 2, 3, 0, 2, 2, 2, 3, 2, 0, 0, 2, 3, 3, 2, 0, 2, 0, 0, 2, 0,
    2, 2, 3, 2, 2, 0, 3, 0, 3, 2, 2, 2, 3, 3, 0, 0, 0, 3, 2, 3, 3, 3, 3, 0, 2, 0, 3, 2, 3, 2, 3, 0,
    2, 3, 3, 2, 3, 3, 2, 2, 0, 0, 2, 3, 3, 2, 3, 0, 2, 0, 2, 0, 3, 2, 3, 2, 3, 0, 3, 0, 3, 0, 2, 3,
    2, 2, 3, 0, 2, 2, 2, 0, 3, 2, 3, 3, 2, 3, 2, 3, 3, 2, 2, 0, 0, 2, 2, 3, 0, 3, 0, 2, 0, 0, 2, 3,
    0, 3, 3, 2, 0, 3, 3, 0, 3, 0, 2, 2, 0, 2, 0, 2, 0, 0, 0, 2, 0, 3, 2, 3, 2, 3, 2, 2, 0, 2, 3, 2,
    3, 2, 2, 2, 2, 3, 0, 2, 0, 0, 2, 3, 3, 0, 2, 3, 2, 2, 3, 0, 3, 0, 0, 2, 0, 2, 0, 2, 2, 3, 3, 2,
    3, 0, 0, 3, 2, 2, 0, 3, 2, 0, 0, 3, 0, 0, 2, 0, 3, 2, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 2, 3, 0, 0,
    2, 0, 0, 2, 0, 2, 3, 2, 3, 3, 2, 2, 0, 0, 0, 3, 0, 2, 0, 2, 0, 2, 2, 2, 3, 3, 0, 0, 3, 3, 3, 3,
    3, 2, 3, 3, 2, 3, 3, 0, 2, 2, 2, 2, 0, 2, 0, 0, 0, 2, 2, 3, 3, 2, 3, 2, 3, 0, 2, 3, 0, 2, 0, 2,
    2, 0, 3, 0, 2, 0, 2, 3, 0, 3, 0, 0, 0, 3, 2, 3, 3, 0, 3, 2, 3, 0, 2, 3, 3, 0, 2, 3, 0, 0, 0, 2,
    0, 3, 0, 2, 3, 3, 3, 3, 3, 0, 2, 0, 2, 2, 3, 3, 0, 3, 0, 2, 0, 2, 0, 3, 0, 0, 0, 2, 3, 3, 2, 3,
    0, 0, 0, 0, 3, 3, 0, 3, 2, 0, 2, 3, 2, 2, 3, 3, 2, 2, 2, 0, 2, 3, 0, 3, 3, 0, 0, 2, 0, 3, 2, 3,
    0, 2, 0, 2, 2, 3, 2, 0, 3, 3, 3, 2, 3, 0, 3, 0, 2, 2, 0, 0, 0, 3, 0, 3, 3, 2, 3, 2, 3, 2, 3, 0,
    2, 3, 0, 2, 0, 3, 3, 3, 3, 3, 3, 2, 0, 3, 2, 2, 2, 3, 3, 2, 3, 0, 2, 3, 3, 2, 2, 0, 0, 0, 0, 3,
    0, 3, 3, 3, 0, 0, 0, 3, 3, 3, 3, 3, 0, 2, 3, 3, 3, 3, 3, 3, 0, 0, 2, 2, 3, 3, 2, 2, 0, 0, 3, 0,
    0, 0, 2, 3, 0, 0, 0, 3, 0, 3, 0, 2, 2, 0, 0, 0, 0, 3, 2, 2, 3, 2, 3, 2, 2, 2, 2, 3, 0, 0, 2, 3,
    0, 3, 3, 0, 3, 0, 0, 2, 0, 3, 3, 0, 2, 2, 3, 3, 0, 0, 2, 0, 2, 3, 2, 0, 0, 3, 3, 0, 3, 2, 0, 2,
    0, 2, 3, 2, 0, 3, 3, 2, 0, 0, 2, 2, 0, 0, 2, 0, 3, 3, 2, 3, 2, 0, 3, 0, 2, 2, 3, 3, 0, 3, 2, 2,
    0, 3, 0, 0, 0, 2, 0, 3, 2, 0, 2, 3, 2, 3, 2, 2, 3, 3, 0, 2, 3, 2, 3, 2, 2, 0, 3, 0, 3, 0, 2, 2,
    2, 0, 2, 0, 2, 2, 0, 0, 3, 3, 0, 0, 3, 2, 0, 2, 3, 2, 2, 0, 3, 3, 0, 2, 0, 3, 3, 0, 2, 3, 2, 3,
    2, 0, 2, 2, 0, 0, 0, 2, 2, 3, 3, 2, 2, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 2, 0, 3, 3,
    3, 0, 2, 0, 2, 3, 2, 0, 3, 3, 2, 0, 2, 0, 3, 2, 0, 3, 0, 0, 2, 2, 0, 3, 0, 2, 3, 3, 3, 0, 2, 0,
    0, 3, 0, 2, 3, 2, 2, 0, 3, 3, 3, 3, 3, 0, 3, 0, 0, 0, 0, 3, 2, 0, 0, 2, 3, 3, 2, 2, 0, 3, 2, 0,
    3, 0, 2, 3, 3, 0, 2, 2, 3, 2, 2, 2, 3, 2, 0, 0, 3, 2, 0, 0, 0, 2, 0, 2, 0, 0, 2, 2, 3, 0, 3, 0,
    0, 3, 0, 0, 0, 3, 0, 0, 2, 2, 0, 2, 2, 3, 3, 3, 3, 0, 0, 2, 2, 2, 0, 3, 2, 2, 2, 2, 2, 0, 3, 0,
    0, 3, 2, 0, 0, 3, 2, 3, 3, 0, 3, 0, 3, 0, 3, 2, 2, 2, 0, 0, 3, 2, 2, 0, 0, 0, 2, 3, 2, 0, 2, 3,
    3, 3, 0, 3, 3, 0, 2, 0, 0, 2, 3, 3, 0, 3, 2, 2, 2, 2, 2, 3, 3, 2, 2, 3, 3, 2, 3, 0, 3, 3, 0, 3,
    2, 2, 0, 2, 0, 3, 0, 3, 0, 2, 3, 0, 2, 3, 2, 0, 2, 0, 3, 0, 2, 3, 3, 2, 0, 3, 3, 3, 2, 2, 3, 3,
    2, 2, 2, 0, 3, 2, 2, 0},
   {271, 271, 329, 343, 387, 426, 426, 601},
   {426, 601, 426, 387, 343, 271, 329, 271},
   {3.70991, 4.43491, 3.76334, 9.43944, 9.43944, 3.70991, 3.76334, 4.43491}}};

typedef ConnectComponentsEdgesTest<int, float> ConnectComponentsEdgesTestF_Int;
TEST_P(ConnectComponentsEdgesTestF_Int, Result) { EXPECT_TRUE(true); }

INSTANTIATE_TEST_CASE_P(ConnectComponentsEdgesTest,
                        ConnectComponentsEdgesTestF_Int,
                        ::testing::ValuesIn(mr_fix_conn_inputsf2));

};  // namespace sparse
};  // end namespace cuvs