From f4d6628b48c7df8a96ce921b4c490dfbb74a1d76 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 18 Jan 2017 18:15:03 -0700
Subject: [PATCH] Add a test.

---
 tests/base/signaling_nan_point.cc     | 57 +++++++++++++++++++++++++++
 tests/base/signaling_nan_point.output |  3 ++
 2 files changed, 60 insertions(+)
 create mode 100644 tests/base/signaling_nan_point.cc
 create mode 100644 tests/base/signaling_nan_point.output

diff --git a/tests/base/signaling_nan_point.cc b/tests/base/signaling_nan_point.cc
new file mode 100644
index 0000000000..79cfc04294
--- /dev/null
+++ b/tests/base/signaling_nan_point.cc
@@ -0,0 +1,57 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2017 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 at
+// the top level of the deal.II distribution.
+//
+// ---------------------------------------------------------------------
+
+
+// check numbers::signaling_nan<Point>
+//
+// the test only checks that the function can be called. It would have
+// been nicer to output the tensors (which would also verify the
+// correct output type, as well as that indeed *each* element is
+// correctly filled), but outputting a sNaN triggers a floating point
+// exception as well
+
+#include "../tests.h"
+#include <deal.II/base/logstream.h>
+#include <deal.II/base/signaling_nan.h>
+#include <fstream>
+#include <iomanip>
+#include <limits>
+#include <fenv.h>
+
+
+template <typename T>
+void check ()
+{
+  numbers::signaling_nan<Point<1,T> >();
+  numbers::signaling_nan<Point<2,T> >();
+  numbers::signaling_nan<Point<3,T> >();
+
+  deallog << "OK" << std::endl;
+}
+
+
+int main ()
+{
+  std::ofstream logfile("output");
+  deallog << std::setprecision(3);
+  deallog.attach(logfile);
+  deallog.threshold_double(1.e-10);
+
+  check<float> ();
+  check<double> ();
+
+  return 0;
+}
+
diff --git a/tests/base/signaling_nan_point.output b/tests/base/signaling_nan_point.output
new file mode 100644
index 0000000000..8b3b075900
--- /dev/null
+++ b/tests/base/signaling_nan_point.output
@@ -0,0 +1,3 @@
+
+DEAL::OK
+DEAL::OK
-- 
2.39.5