1 files changed, 33 insertions, 0 deletions
diff --git a/eigen/test/nesting_ops.cpp b/eigen/test/nesting_ops.cpp
new file mode 100644
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+++ b/eigen/test/nesting_ops.cpp
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2010 Hauke Heibel <hauke.heibel@gmail.com>
+//
+// 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 "main.h"
+
+template <typename MatrixType> void run_nesting_ops(const MatrixType& _m)
+{
+  typename MatrixType::Nested m(_m);
+
+  // Make really sure that we are in debug mode!
+  VERIFY_RAISES_ASSERT(eigen_assert(false));
+
+  // The only intention of these tests is to ensure that this code does
+  // not trigger any asserts or segmentation faults... more to come.
+  VERIFY_IS_APPROX( (m.transpose() * m).diagonal().sum(), (m.transpose() * m).diagonal().sum() );
+  VERIFY_IS_APPROX( (m.transpose() * m).diagonal().array().abs().sum(), (m.transpose() * m).diagonal().array().abs().sum() );
+
+  VERIFY_IS_APPROX( (m.transpose() * m).array().abs().sum(), (m.transpose() * m).array().abs().sum() );
+}
+
+void test_nesting_ops()
+{
+  CALL_SUBTEST_1(run_nesting_ops(MatrixXf::Random(25,25)));
+  CALL_SUBTEST_2(run_nesting_ops(MatrixXd::Random(25,25)));
+  CALL_SUBTEST_3(run_nesting_ops(Matrix4f::Random()));
+  CALL_SUBTEST_4(run_nesting_ops(Matrix4d::Random()));
+}