From daa4574a43caf68122bde9dfb8a43b764a0e8941 Mon Sep 17 00:00:00 2001
From: Jitse Niesen <jitse@maths.leeds.ac.uk>
Date: Thu, 5 Nov 2009 03:46:18 +0000
Subject: [PATCH] Add regression test for issue #66 (ComplexSchur of zero
 matrix).

---
 test/eigensolver_complex.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/test/eigensolver_complex.cpp b/test/eigensolver_complex.cpp
index 38ede7c4a..e1ce575e1 100644
--- a/test/eigensolver_complex.cpp
+++ b/test/eigensolver_complex.cpp
@@ -49,6 +49,10 @@ template<typename MatrixType> void eigensolver(const MatrixType& m)
   ComplexEigenSolver<MatrixType> ei1(a);
   VERIFY_IS_APPROX(a * ei1.eigenvectors(), ei1.eigenvectors() * ei1.eigenvalues().asDiagonal());
 
+  // Regression test for issue #66
+  MatrixType z = MatrixType::Zero(rows,cols);
+  ComplexEigenSolver<MatrixType> eiz(z);
+  VERIFY((eiz.eigenvalues().cwise()==0).all());
 }
 
 void test_eigensolver_complex()
@@ -58,4 +62,3 @@ void test_eigensolver_complex()
     CALL_SUBTEST( eigensolver(MatrixXcd(14,14)) );
   }
 }
-