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-rw-r--r--test/sparse_basic.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/test/sparse_basic.cpp b/test/sparse_basic.cpp
index 2380dfa34..097959c84 100644
--- a/test/sparse_basic.cpp
+++ b/test/sparse_basic.cpp
@@ -472,6 +472,12 @@ template<typename SparseMatrixType> void sparse_basic(const SparseMatrixType& re
SparseMatrixType m2(rows, cols);
initSparse<Scalar>(density, refMat2, m2);
VERIFY_IS_APPROX(m2.diagonal(), refMat2.diagonal().eval());
+ VERIFY_IS_APPROX(const_cast<const SparseMatrixType&>(m2).diagonal(), refMat2.diagonal().eval());
+
+ initSparse<Scalar>(density, refMat2, m2, ForceNonZeroDiag);
+ m2.diagonal() += refMat2.diagonal();
+ refMat2.diagonal() += refMat2.diagonal();
+ VERIFY_IS_APPROX(m2, refMat2);
}
// test conservative resize