From ed757cb2cedfe06c2ddc1c52433732253acbe18d Mon Sep 17 00:00:00 2001
From: danshapero <shapero.daniel@gmail.com>
Date: Thu, 31 Mar 2016 20:56:45 -0700
Subject: [PATCH] Test of SparseMatrix move ctor checks that ExcInUse is thrown

---
 tests/lac/sparse_matrix_move.cc               | 75 +++++++++++++------
 .../sparse_matrix_move.with_cxx11=on.output   |  1 +
 2 files changed, 54 insertions(+), 22 deletions(-)

diff --git a/tests/lac/sparse_matrix_move.cc b/tests/lac/sparse_matrix_move.cc
index 8652539bd4..0da8932f77 100644
--- a/tests/lac/sparse_matrix_move.cc
+++ b/tests/lac/sparse_matrix_move.cc
@@ -71,30 +71,61 @@ int main()
   testproblem.five_point_structure(sparsity);
   sparsity.compress();
 
-  // Return a sparse matrix, possibly using RVO or move constructor
-  SparseMatrix<double> A = graph_laplacian(sparsity);
-  deallog << A.n_nonzero_elements() << std::endl;
-
   Vector<double> x(dim), y(dim);
-  x = 1.0;
-  y = 1.0;
-  A.vmult(y, x);
-
-  deallog << y.l2_norm() << std::endl;
-
-  // Return a sparse matrix using the move constructor
-  SparseMatrix<double> B = graph_laplacian_move_return(sparsity);
-  deallog << B.n_nonzero_elements() << std::endl;
-  y = 1.0;
-  B.vmult(y, x);
-
-  deallog << y.l2_norm() << std::endl;
 
-  // Explicitly move a sparse matrix
-  SparseMatrix<double> C;
-  C = std::move(B);
-  deallog << C.m() << std::endl;
-  deallog << B.empty() << std::endl;
+  {
+    // Return a sparse matrix, possibly using RVO or move constructor
+    SparseMatrix<double> A = graph_laplacian(sparsity);
+    deallog << A.n_nonzero_elements() << std::endl;
+
+    x = 1.0;
+    y = 1.0;
+    A.vmult(y, x);
+
+    deallog << y.l2_norm() << std::endl;
+  }
+
+  {
+    // Return a sparse matrix using the move constructor
+    SparseMatrix<double> A = graph_laplacian_move_return(sparsity);
+    deallog << A.n_nonzero_elements() << std::endl;
+    y = 1.0;
+    A.vmult(y, x);
+
+    deallog << y.l2_norm() << std::endl;
+
+    // Explicitly move a sparse matrix
+    SparseMatrix<double> B;
+    B = std::move(A);
+    deallog << B.m() << std::endl;
+    deallog << A.empty() << std::endl;
+  }
+
+  {
+    // Try to move a sparse matrix that has a subscription
+    SparseMatrix<double> A = graph_laplacian(sparsity);
+    SmartPointer<SparseMatrix<double> > smart_pointer_to_A(&A);
+
+    bool need_to_catch_exc_in_use = false;
+#ifdef DEBUG
+    need_to_catch_exc_in_use = true;
+#endif
+
+    try
+      {
+        SparseMatrix<double> B = std::move(A);
+      }
+    catch (const Subscriptor::ExcInUse&)
+      {
+        need_to_catch_exc_in_use = false;
+      }
+    catch(...)
+      {
+        return 1;
+      }
+
+    deallog << "Exception caught if in debug mode." << std::endl;
+  }
 
   return 0;
 }
diff --git a/tests/lac/sparse_matrix_move.with_cxx11=on.output b/tests/lac/sparse_matrix_move.with_cxx11=on.output
index 7239c9cda8..ced490f8e7 100644
--- a/tests/lac/sparse_matrix_move.with_cxx11=on.output
+++ b/tests/lac/sparse_matrix_move.with_cxx11=on.output
@@ -5,3 +5,4 @@ DEAL::64
 DEAL::0.00
 DEAL::16
 DEAL::1
+DEAL::Exception caught if in debug mode.
-- 
2.39.5