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/*
 * Copyright 2009-2019 The VOTCA Development Team (http://www.votca.org)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *
 *     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.
 *
 */
#define BOOST_TEST_MAIN

#define BOOST_TEST_MODULE adiis_test
#include <boost/test/unit_test.hpp>
#include <iostream>
#include <votca/xtp/adiis.h>

using namespace votca::xtp;

BOOST_AUTO_TEST_SUITE(adiis_test)

BOOST_AUTO_TEST_CASE(coeffs_test) {
  std::vector<Eigen::MatrixXd> _dmatHist;
  std::vector<Eigen::MatrixXd> _mathist;

  ADIIS adiis;

  _dmatHist.push_back(Eigen::MatrixXd::Zero(17, 17));
  _dmatHist.back() << 0.00157507236, 0.0337453821, 4.48904516e-16,
      -5.93152213e-16, 7.87132607e-17, 0.0308759804, 2.51254428e-16,
      -1.49094084e-16, 5.77899242e-17, 0.00415998114, -0.00445631597,
      0.00415998114, -0.00445631597, 0.00415998114, -0.00445631597,
      0.00415998114, -0.00445631597, 0.0337453821, 0.722983175, 2.6642664e-15,
      -4.44783339e-15, 3.45846178e-16, 0.661507233, 4.39853895e-15,
      -2.02475102e-15, 1.04832445e-15, 0.0891261613, -0.0954750329,
      0.0891261613, -0.0954750329, 0.0891261613, -0.0954750329, 0.0891261613,
      -0.0954750329, 4.48904516e-16, 2.6642664e-15, 1.5219863, 2.88657986e-15,
      2.09034179e-15, -7.942125e-15, 0.215492472, 2.87270208e-15,
      -1.40512602e-15, 0.141933218, -0.0402359119, 0.141933218, -0.0402359119,
      -0.141933218, 0.0402359119, -0.141933218, 0.0402359119, -5.93152213e-16,
      -4.44783339e-15, 2.88657986e-15, 1.5219863, -2.31759056e-15,
      9.21105467e-15, -2.22044605e-15, 0.215492472, 1.62630326e-15, 0.141933218,
      -0.0402359119, -0.141933218, 0.0402359119, -0.141933218, 0.0402359119,
      0.141933218, -0.0402359119, 7.87132607e-17, 3.45846178e-16,
      2.09034179e-15, -2.31759056e-15, 1.5219863, 2.98901767e-15,
      -2.04957579e-15, 4.79737777e-15, 0.215492472, 0.141933218, -0.0402359119,
      -0.141933218, 0.0402359119, 0.141933218, -0.0402359119, -0.141933218,
      0.0402359119, 0.0308759804, 0.661507233, -7.942125e-15, 9.21105467e-15,
      2.98901767e-15, 0.605258649, 2.55488257e-15, 2.77790162e-17,
      1.33758513e-15, 0.0815476797, -0.0873567007, 0.0815476797, -0.0873567007,
      0.0815476797, -0.0873567007, 0.0815476797, -0.0873567007, 2.51254428e-16,
      4.39853895e-15, 0.215492472, -2.22044605e-15, -2.04957579e-15,
      2.55488257e-15, 0.0305107908, 3.2959746e-17, -5.2903645e-16, 0.0200958051,
      -0.00569685557, 0.0200958051, -0.00569685557, -0.0200958051,
      0.00569685557, -0.0200958051, 0.00569685557, -1.49094084e-16,
      -2.02475102e-15, 2.87270208e-15, 0.215492472, 4.79737777e-15,
      2.77790162e-17, 3.2959746e-17, 0.0305107908, 9.55941055e-16, 0.0200958051,
      -0.00569685557, -0.0200958051, 0.00569685557, -0.0200958051,
      0.00569685557, 0.0200958051, -0.00569685557, 5.77899242e-17,
      1.04832445e-15, -1.40512602e-15, 1.62630326e-15, 0.215492472,
      1.33758513e-15, -5.2903645e-16, 9.55941055e-16, 0.0305107908,
      0.0200958051, -0.00569685557, -0.0200958051, 0.00569685557, 0.0200958051,
      -0.00569685557, -0.0200958051, 0.00569685557, 0.00415998114, 0.0891261613,
      0.141933218, 0.141933218, 0.141933218, 0.0815476797, 0.0200958051,
      0.0200958051, 0.0200958051, 0.0506951329, -0.0230263694, -0.00224894011,
      -0.00801752871, -0.00224894011, -0.00801752871, -0.00224894011,
      -0.00801752871, -0.00445631597, -0.0954750329, -0.0402359119,
      -0.0402359119, -0.0402359119, -0.0873567007, -0.00569685557,
      -0.00569685557, -0.00569685557, -0.0230263694, 0.015799236,
      -0.00801752871, 0.0115444576, -0.00801752871, 0.0115444576,
      -0.00801752871, 0.0115444576, 0.00415998114, 0.0891261613, 0.141933218,
      -0.141933218, -0.141933218, 0.0815476797, 0.0200958051, -0.0200958051,
      -0.0200958051, -0.00224894011, -0.00801752871, 0.0506951329,
      -0.0230263694, -0.00224894011, -0.00801752871, -0.00224894011,
      -0.00801752871, -0.00445631597, -0.0954750329, -0.0402359119,
      0.0402359119, 0.0402359119, -0.0873567007, -0.00569685557, 0.00569685557,
      0.00569685557, -0.00801752871, 0.0115444576, -0.0230263694, 0.015799236,
      -0.00801752871, 0.0115444576, -0.00801752871, 0.0115444576, 0.00415998114,
      0.0891261613, -0.141933218, -0.141933218, 0.141933218, 0.0815476797,
      -0.0200958051, -0.0200958051, 0.0200958051, -0.00224894011,
      -0.00801752871, -0.00224894011, -0.00801752871, 0.0506951329,
      -0.0230263694, -0.00224894011, -0.00801752871, -0.00445631597,
      -0.0954750329, 0.0402359119, 0.0402359119, -0.0402359119, -0.0873567007,
      0.00569685557, 0.00569685557, -0.00569685557, -0.00801752871,
      0.0115444576, -0.00801752871, 0.0115444576, -0.0230263694, 0.015799236,
      -0.00801752871, 0.0115444576, 0.00415998114, 0.0891261613, -0.141933218,
      0.141933218, -0.141933218, 0.0815476797, -0.0200958051, 0.0200958051,
      -0.0200958051, -0.00224894011, -0.00801752871, -0.00224894011,
      -0.00801752871, -0.00224894011, -0.00801752871, 0.0506951329,
      -0.0230263694, -0.00445631597, -0.0954750329, 0.0402359119, -0.0402359119,
      0.0402359119, -0.0873567007, 0.00569685557, -0.00569685557, 0.00569685557,
      -0.00801752871, 0.0115444576, -0.00801752871, 0.0115444576,
      -0.00801752871, 0.0115444576, -0.0230263694, 0.015799236;

  _dmatHist.push_back(Eigen::MatrixXd::Zero(17, 17));
  _dmatHist.back() << 0.00113067308, 0.0234807013, 2.75153357e-15,
      2.20623526e-15, 2.55343929e-15, 0.0242194843, -1.14836338e-14,
      -1.19349082e-14, -1.16818695e-14, 0.00233470139, -0.00503225244,
      0.00233470139, -0.00503225244, 0.00233470139, -0.00503225244,
      0.00233470139, -0.00503225244, 0.0234807013, 0.506795831, 1.96929344e-14,
      1.47658637e-14, 1.82565083e-14, 0.449981495, -1.47659218e-13,
      -1.58085765e-13, -1.53118968e-13, 0.0652840601, -0.0572374845,
      0.0652840601, -0.0572374845, 0.0652840601, -0.0572374845, 0.0652840601,
      -0.0572374845, 2.75153357e-15, 1.96929344e-14, 1.06570509, 8.25406367e-15,
      7.13839524e-15, -1.35007168e-13, 0.148654077, -3.17926675e-14,
      -3.34484393e-14, 0.101236262, -0.0202701873, 0.101236262, -0.0202701873,
      -0.101236262, 0.0202701873, -0.101236262, 0.0202701873, 2.20623526e-15,
      1.47658637e-14, 8.25406367e-15, 1.06570509, 4.63958841e-15,
      -1.21838502e-13, -3.61166392e-14, 0.148654077, -3.27138056e-14,
      0.101236262, -0.0202701873, -0.101236262, 0.0202701873, -0.101236262,
      0.0202701873, 0.101236262, -0.0202701873, 2.55343929e-15, 1.82565083e-14,
      7.13839524e-15, 4.63958841e-15, 1.06570509, -1.27947338e-13,
      -3.37586513e-14, -3.05460952e-14, 0.148654077, 0.101236262, -0.0202701873,
      -0.101236262, 0.0202701873, 0.101236262, -0.0202701873, -0.101236262,
      0.0202701873, 0.0242194843, 0.449981495, -1.35007168e-13, -1.21838502e-13,
      -1.27947338e-13, 0.665224564, 1.39489732e-12, 1.48799728e-12,
      1.43172697e-12, 0.00358237918, -0.238424879, 0.00358237918, -0.238424879,
      0.00358237918, -0.238424879, 0.00358237918, -0.238424879, -1.14836338e-14,
      -1.47659218e-13, 0.148654077, -3.61166392e-14, -3.37586513e-14,
      1.39489732e-12, 0.0366081166, 1.73861099e-13, 1.75622228e-13,
      0.00095821862, -0.0589496747, 0.00095821862, -0.0589496747,
      -0.00095821862, 0.0589496747, -0.00095821862, 0.0589496747,
      -1.19349082e-14, -1.58085765e-13, -3.17926675e-14, 0.148654077,
      -3.05460952e-14, 1.48799728e-12, 1.73861099e-13, 0.0366081166,
      1.688846e-13, 0.00095821862, -0.0589496747, -0.00095821862, 0.0589496747,
      -0.00095821862, 0.0589496747, 0.00095821862, -0.0589496747,
      -1.16818695e-14, -1.53118968e-13, -3.34484393e-14, -3.27138056e-14,
      0.148654077, 1.43172697e-12, 1.75622228e-13, 1.688846e-13, 0.0366081166,
      0.00095821862, -0.0589496747, -0.00095821862, 0.0589496747, 0.00095821862,
      -0.0589496747, -0.00095821862, 0.0589496747, 0.00233470139, 0.0652840601,
      0.101236262, 0.101236262, 0.101236262, 0.00358237918, 0.00095821862,
      0.00095821862, 0.00095821862, 0.0811405658, 0.164877199, -0.000991884457,
      -0.0135897555, -0.000991884457, -0.0135897555, -0.000991884457,
      -0.0135897555, -0.00503225244, -0.0572374845, -0.0202701873,
      -0.0202701873, -0.0202701873, -0.238424879, -0.0589496747, -0.0589496747,
      -0.0589496747, 0.164877199, 0.735401758, -0.0135897555, -0.0598903608,
      -0.0135897555, -0.0598903608, -0.0135897555, -0.0598903608, 0.00233470139,
      0.0652840601, 0.101236262, -0.101236262, -0.101236262, 0.00358237918,
      0.00095821862, -0.00095821862, -0.00095821862, -0.000991884457,
      -0.0135897555, 0.0811405658, 0.164877199, -0.000991884457, -0.0135897555,
      -0.000991884457, -0.0135897555, -0.00503225244, -0.0572374845,
      -0.0202701873, 0.0202701873, 0.0202701873, -0.238424879, -0.0589496747,
      0.0589496747, 0.0589496747, -0.0135897555, -0.0598903608, 0.164877199,
      0.735401758, -0.0135897555, -0.0598903608, -0.0135897555, -0.0598903608,
      0.00233470139, 0.0652840601, -0.101236262, -0.101236262, 0.101236262,
      0.00358237918, -0.00095821862, -0.00095821862, 0.00095821862,
      -0.000991884457, -0.0135897555, -0.000991884457, -0.0135897555,
      0.0811405658, 0.164877199, -0.000991884457, -0.0135897555, -0.00503225244,
      -0.0572374845, 0.0202701873, 0.0202701873, -0.0202701873, -0.238424879,
      0.0589496747, 0.0589496747, -0.0589496747, -0.0135897555, -0.0598903608,
      -0.0135897555, -0.0598903608, 0.164877199, 0.735401758, -0.0135897555,
      -0.0598903608, 0.00233470139, 0.0652840601, -0.101236262, 0.101236262,
      -0.101236262, 0.00358237918, -0.00095821862, 0.00095821862,
      -0.00095821862, -0.000991884457, -0.0135897555, -0.000991884457,
      -0.0135897555, -0.000991884457, -0.0135897555, 0.0811405658, 0.164877199,
      -0.00503225244, -0.0572374845, 0.0202701873, -0.0202701873, 0.0202701873,
      -0.238424879, 0.0589496747, -0.0589496747, 0.0589496747, -0.0135897555,
      -0.0598903608, -0.0135897555, -0.0598903608, -0.0135897555, -0.0598903608,
      0.164877199, 0.735401758;
  _dmatHist.push_back(Eigen::MatrixXd::Zero(17, 17));
  _dmatHist.back() << 0.000793901464, 0.0119355753, -1.40268798e-14,
      -1.33736083e-14, -1.38284636e-14, 0.0131916418, -1.90038465e-14,
      -1.7115047e-14, -1.83111368e-14, -0.000639170975, -0.00567797114,
      -0.000639170975, -0.00567797114, -0.000639170975, -0.00567797114,
      -0.000639170975, -0.00567797114, 0.0119355753, 0.288311753,
      4.43648439e-14, 4.18260894e-14, 4.49262449e-14, 0.251249645,
      -4.31548671e-14, -5.88017665e-14, -4.92704812e-14, 0.0488884146,
      -0.0128520365, 0.0488884146, -0.0128520365, 0.0488884146, -0.0128520365,
      0.0488884146, -0.0128520365, -1.40268798e-14, 4.43648439e-14, 0.609528476,
      2.43268911e-13, 2.3613892e-13, 6.89095958e-13, 0.0942236916,
      -2.95492904e-13, -3.04053598e-13, 0.0783697835, 0.0355432545,
      0.0783697835, 0.0355432545, -0.0783697835, -0.0355432545, -0.0783697835,
      -0.0355432545, -1.33736083e-14, 4.18260894e-14, 2.43268911e-13,
      0.609528476, 2.40424903e-13, 6.58378116e-13, -3.05059296e-13,
      0.0942236916, -3.01807142e-13, 0.0783697835, 0.0355432545, -0.0783697835,
      -0.0355432545, -0.0783697835, -0.0355432545, 0.0783697835, 0.0355432545,
      -1.38284636e-14, 4.49262449e-14, 2.3613892e-13, 2.40424903e-13,
      0.609528476, 6.82646824e-13, -3.03093482e-13, -3.00641592e-13,
      0.0942236916, 0.0783697835, 0.0355432545, -0.0783697835, -0.0355432545,
      0.0783697835, 0.0355432545, -0.0783697835, -0.0355432545, 0.0131916418,
      0.251249645, 6.89095958e-13, 6.58378116e-13, 6.82646824e-13, 0.36941951,
      1.26872449e-12, 1.29369708e-12, 1.28160653e-12, 0.00483257769,
      -0.128030592, 0.00483257768, -0.128030592, 0.00483257768, -0.128030592,
      0.00483257768, -0.128030592, -1.90038465e-14, -4.31548671e-14,
      0.0942236916, -3.05059296e-13, -3.03093482e-13, 1.26872449e-12,
      0.0278620861, -3.63843298e-13, -3.64665746e-13, 0.014801376,
      -0.00263635698, 0.014801376, -0.00263635698, -0.014801376, 0.00263635698,
      -0.014801376, 0.00263635698, -1.7115047e-14, -5.88017665e-14,
      -2.95492904e-13, 0.0942236916, -3.00641592e-13, 1.29369708e-12,
      -3.63843298e-13, 0.0278620861, -3.69133933e-13, 0.014801376,
      -0.00263635698, -0.014801376, 0.00263635698, -0.014801376, 0.00263635698,
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      -0.0859275816, -0.0859275816, -0.0859275816, -0.411273518, -0.338002386,
      -0.134772773, -0.224536493, -0.134772773, -0.224536493, -0.134772773,
      -0.224536493, -0.00390397444, -0.280839212, -0.179607515, 0.179607515,
      0.179607515, -0.302200962, -0.16807803, 0.16807803, 0.16807803,
      -0.0270490827, -0.134772773, -0.0143991012, -0.411273518, -0.0270490827,
      -0.134772773, -0.0270490827, -0.134772773, 0.227367628, -0.380093553,
      -0.11900992, 0.11900992, 0.11900992, -0.381296987, -0.0859275816,
      0.0859275816, 0.0859275816, -0.134772773, -0.224536493, -0.411273518,
      -0.338002386, -0.134772773, -0.224536493, -0.134772773, -0.224536493,
      -0.00390397444, -0.280839212, 0.179607515, 0.179607515, -0.179607515,
      -0.302200962, 0.16807803, 0.16807803, -0.16807803, -0.0270490827,
      -0.134772773, -0.0270490827, -0.134772773, -0.0143991012, -0.411273518,
      -0.0270490827, -0.134772773, 0.227367628, -0.380093553, 0.11900992,
      0.11900992, -0.11900992, -0.381296987, 0.0859275816, 0.0859275816,
      -0.0859275816, -0.134772773, -0.224536493, -0.134772773, -0.224536493,
      -0.411273518, -0.338002386, -0.134772773, -0.224536493, -0.00390397444,
      -0.280839212, 0.179607515, -0.179607515, 0.179607515, -0.302200962,
      0.16807803, -0.16807803, 0.16807803, -0.0270490827, -0.134772773,
      -0.0270490827, -0.134772773, -0.0270490827, -0.134772773, -0.0143991012,
      -0.411273518, 0.227367628, -0.380093553, 0.11900992, -0.11900992,
      0.11900992, -0.381296987, 0.0859275816, -0.0859275816, 0.0859275816,
      -0.134772773, -0.224536493, -0.134772773, -0.224536493, -0.134772773,
      -0.224536493, -0.411273518, -0.338002386;

  Eigen::VectorXd Coeffs = adiis.CalcCoeff(_dmatHist, _mathist);

  Eigen::VectorXd Ref = Eigen::VectorXd::Zero(3);
  Ref << 4.45639501e-17, 1.76102089e-18, 1;

  bool check_adiis = Coeffs.isApprox(Ref, 0.00001);
  if (!check_adiis) {
    std::cout << "Ref:" << Ref << std::endl;
    std::cout << "Coeffs:" << Coeffs << std::endl;
  }

  BOOST_CHECK_EQUAL(check_adiis, 1);
}

BOOST_AUTO_TEST_SUITE_END()