From aeffdf909eb79dace9f12d0c38583f0dad106f54 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Wed, 16 Jan 2019 15:24:59 +0100
Subject: bug #1617: add unit tests for empty triangular solve.

---
 test/product_trsolve.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'test/product_trsolve.cpp')

diff --git a/test/product_trsolve.cpp b/test/product_trsolve.cpp
index 0c22cccf6..c927cb635 100644
--- a/test/product_trsolve.cpp
+++ b/test/product_trsolve.cpp
@@ -71,6 +71,19 @@ template<typename Scalar,int Size, int Cols> void trsolve(int size=Size,int cols
   int c = internal::random<int>(0,cols-1);
   VERIFY_TRSM(rmLhs.template triangularView<Lower>(), rmRhs.col(c));
   VERIFY_TRSM(cmLhs.template triangularView<Lower>(), rmRhs.col(c));
+
+  if(Size==Dynamic)
+  {
+    cmLhs.resize(0,0);
+    cmRhs.resize(0,cmRhs.cols());
+    Matrix<Scalar,Size,Cols,colmajor> res = cmLhs.template triangularView<Lower>().solve(cmRhs);
+    VERIFY_IS_EQUAL(res.rows(),0);
+    VERIFY_IS_EQUAL(res.cols(),cmRhs.cols());
+    res = cmRhs;
+    cmLhs.template triangularView<Lower>().solveInPlace(res);
+    VERIFY_IS_EQUAL(res.rows(),0);
+    VERIFY_IS_EQUAL(res.cols(),cmRhs.cols());
+  }
 }
 
 EIGEN_DECLARE_TEST(product_trsolve)
-- 
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