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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2011 Gael Guennebaud <g.gael@free.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include "sparse_solver.h"
+#include <Eigen/IterativeLinearSolvers>
+
+template <typename T>
+void test_lscg_T() {
+  LeastSquaresConjugateGradient<SparseMatrix<T> > lscg_colmajor_diag;
+  LeastSquaresConjugateGradient<SparseMatrix<T>, IdentityPreconditioner> lscg_colmajor_I;
+  LeastSquaresConjugateGradient<SparseMatrix<T, RowMajor> > lscg_rowmajor_diag;
+  LeastSquaresConjugateGradient<SparseMatrix<T, RowMajor>, IdentityPreconditioner> lscg_rowmajor_I;
+
+  CALL_SUBTEST(check_sparse_square_solving(lscg_colmajor_diag));
+  CALL_SUBTEST(check_sparse_square_solving(lscg_colmajor_I));
+
+  CALL_SUBTEST(check_sparse_leastsquare_solving(lscg_colmajor_diag));
+  CALL_SUBTEST(check_sparse_leastsquare_solving(lscg_colmajor_I));
+
+  CALL_SUBTEST(check_sparse_square_solving(lscg_rowmajor_diag));
+  CALL_SUBTEST(check_sparse_square_solving(lscg_rowmajor_I));
+
+  CALL_SUBTEST(check_sparse_leastsquare_solving(lscg_rowmajor_diag));
+  CALL_SUBTEST(check_sparse_leastsquare_solving(lscg_rowmajor_I));
+}
+
+EIGEN_DECLARE_TEST(lscg) {
+  CALL_SUBTEST_1(test_lscg_T<double>());
+  CALL_SUBTEST_2(test_lscg_T<std::complex<double> >());
+}