Snap for 8512216 from bc0f5df265caa21a2120c22453655a7fcc941991 to tm-frc-resolv-releaset_frc_res_330443000android13-frc-resolv-release

Change-Id: I80c95f4bc26e9ce9db6b17b25e1b63e45c82ad27

1 files changed, 14 insertions, 1 deletions

diff --git a/test/sparse_solvers.cpp b/test/sparse_solvers.cpp
index 3a8873d43..3b7cd7788 100644
--- a/test/sparse_solvers.cpp
+++ b/test/sparse_solvers.cpp
@@ -98,10 +98,23 @@ template<typename Scalar> void sparse_solvers(int rows, int cols)
     initSparse<Scalar>(density, refMat2, m2, ForceNonZeroDiag|MakeLowerTriangular, &zeroCoords, &nonzeroCoords);
     VERIFY_IS_APPROX(refMat2.template triangularView<Lower>().solve(vec2),
                      m2.template triangularView<Lower>().solve(vec3));
+
+    // test empty triangular matrix
+    {
+      m2.resize(0,0);
+      refMatB.resize(0,refMatB.cols());
+      DenseMatrix res = m2.template triangularView<Lower>().solve(refMatB);
+      VERIFY_IS_EQUAL(res.rows(),0);
+      VERIFY_IS_EQUAL(res.cols(),refMatB.cols());
+      res = refMatB;
+      m2.template triangularView<Lower>().solveInPlace(res);
+      VERIFY_IS_EQUAL(res.rows(),0);
+      VERIFY_IS_EQUAL(res.cols(),refMatB.cols());
+    }
   }
 }
 
-void test_sparse_solvers()
+EIGEN_DECLARE_TEST(sparse_solvers)
 {
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1(sparse_solvers<double>(8, 8) );