From bafbb926c4c67696d46d243875747dbdf6a38679 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 9 Feb 2021 18:55:09 -0700
Subject: [PATCH] Add test.

---
 tests/base/array_view_17.cc     | 67 +++++++++++++++++++++++++++++++++
 tests/base/array_view_17.output |  2 +
 2 files changed, 69 insertions(+)
 create mode 100644 tests/base/array_view_17.cc
 create mode 100644 tests/base/array_view_17.output

diff --git a/tests/base/array_view_17.cc b/tests/base/array_view_17.cc
new file mode 100644
index 0000000000..341f284f90
--- /dev/null
+++ b/tests/base/array_view_17.cc
@@ -0,0 +1,67 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2015 - 2018 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE.md at
+// the top level directory of deal.II.
+//
+// ---------------------------------------------------------------------
+
+
+// test for class ArrayView with C-style arrays
+
+#include <deal.II/base/array_view.h>
+
+#include "../tests.h"
+
+
+void
+test()
+{
+  int v[10];
+
+  {
+    ArrayView<int> a(&v[4], 3); // writable view
+    a[2] = 42;
+
+    Assert(a[2] == 42, ExcInternalError());
+    Assert(v[6] == 42, ExcInternalError());
+  }
+
+  {
+    ArrayView<int> a(v); // writable view
+    a[1] = 43;
+
+    Assert(v[1] == 43, ExcInternalError());
+    Assert(a[6] == 42, ExcInternalError());
+  }
+
+  {
+    ArrayView<const int> a2(&v[4], 3); // readable view
+    Assert(a2[2] == 42, ExcInternalError());
+  }
+
+  {
+    ArrayView<const int> a2(v); // readable view
+    Assert(a2[1] == 43, ExcInternalError());
+    Assert(a2[6] == 42, ExcInternalError());
+  }
+
+  deallog << "OK" << std::endl;
+}
+
+
+
+int
+main()
+{
+  initlog();
+
+  test();
+}
diff --git a/tests/base/array_view_17.output b/tests/base/array_view_17.output
new file mode 100644
index 0000000000..0fd8fc12f0
--- /dev/null
+++ b/tests/base/array_view_17.output
@@ -0,0 +1,2 @@
+
+DEAL::OK
-- 
2.39.5