From 773c644a2abb15d6cf55da154a5dbb4c1042760d Mon Sep 17 00:00:00 2001
From: Luca Heltai <luca.heltai@sissa.it>
Date: Tue, 20 Nov 2018 16:39:33 +0100
Subject: [PATCH] Added test for multi-components parsed functions.

---
 tests/base/function_parser_11.cc              | 51 +++++++++++++++++++
 ...nction_parser_11.with_muparser=true.output |  3 ++
 2 files changed, 54 insertions(+)
 create mode 100644 tests/base/function_parser_11.cc
 create mode 100644 tests/base/function_parser_11.with_muparser=true.output

diff --git a/tests/base/function_parser_11.cc b/tests/base/function_parser_11.cc
new file mode 100644
index 0000000000..61f3646928
--- /dev/null
+++ b/tests/base/function_parser_11.cc
@@ -0,0 +1,51 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 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 expression only constructor with vector based function
+
+#include <deal.II/base/function_parser.h>
+#include <deal.II/base/point.h>
+
+#include <deal.II/lac/vector.h>
+
+#include <map>
+
+#include "../tests.h"
+
+
+double
+eval(const std::string &exp, unsigned int comp)
+{
+  FunctionParser<2> fp(exp);
+
+  Point<2> p;
+
+  return fp.value(p, comp);
+}
+
+
+int
+main()
+{
+  initlog();
+
+  for (unsigned int i = 0; i < 2; ++i)
+    {
+      double random = eval("rand(); rand()", i);
+      if (0.0 <= random && random <= 1.0)
+        deallog << "OK" << std::endl;
+    }
+}
diff --git a/tests/base/function_parser_11.with_muparser=true.output b/tests/base/function_parser_11.with_muparser=true.output
new file mode 100644
index 0000000000..8b3b075900
--- /dev/null
+++ b/tests/base/function_parser_11.with_muparser=true.output
@@ -0,0 +1,3 @@
+
+DEAL::OK
+DEAL::OK
-- 
2.39.5