From 782894ebfbde281401092bd89b1a2f9cceafc3c9 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Mon, 22 Jun 2015 00:10:24 +0300
Subject: [PATCH] Add test for mp_contains.

---
 test/Jamfile.v2      |  2 +-
 test/mp_contains.cpp | 64 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 1 deletion(-)
 create mode 100644 test/mp_contains.cpp

diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 4cd6c40..eb3e20c 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -31,7 +31,7 @@ run mp_transform.cpp : : : $(REQ) ;
 run mp_fill.cpp : : : $(REQ) ;
 run mp_count.cpp : : : $(REQ) ;
 run mp_count_if.cpp : : : $(REQ) ;
-#run mp_contains.cpp : : : $(REQ) ;
+run mp_contains.cpp : : : $(REQ) ;
 run mp_repeat.cpp : : : $(REQ) ;
 
 # integral
diff --git a/test/mp_contains.cpp b/test/mp_contains.cpp
new file mode 100644
index 0000000..deef491
--- /dev/null
+++ b/test/mp_contains.cpp
@@ -0,0 +1,64 @@
+
+//  Copyright 2015 Peter Dimov.
+//
+// Distributed under the Boost Software License, Version 1.0.
+//
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+
+
+#include <boost/mp11/algorithm.hpp>
+#include <boost/mp11/list.hpp>
+#include <boost/mp11/integral.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <type_traits>
+#include <tuple>
+#include <utility>
+
+struct X1 {};
+struct X2 {};
+struct X3 {};
+
+int main()
+{
+    using boost::mp_list;
+    using boost::mp_contains;
+    using boost::mp_true;
+    using boost::mp_false;
+
+    {
+        using L1 = mp_list<>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L1, void>, mp_false>));
+
+        using L2 = mp_list<X1, X2, X3, X2, X3, X3>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L2, void>, mp_false>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L2, X1>, mp_true>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L2, X2>, mp_true>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L2, X3>, mp_true>));
+    }
+
+    {
+        using L3 = std::tuple<>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L3, void>, mp_false>));
+
+        using L4 = std::tuple<X1, X2, X3, X2, X3, X3>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L4, void>, mp_false>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L4, X1>, mp_true>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L4, X2>, mp_true>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L4, X3>, mp_true>));
+    }
+
+    {
+        using L5 = std::pair<X1, X2>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L5, void>, mp_false>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L5, X1>, mp_true>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_contains<L5, X2>, mp_true>));
+    }
+
+    return boost::report_errors();
+}