1 files changed, 48 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/_include/auto/length.hpp b/src/boost/libs/hana/test/_include/auto/length.hpp
new file mode 100644
index 000000000..25f75dc4d
--- /dev/null
+++ b/src/boost/libs/hana/test/_include/auto/length.hpp
@@ -0,0 +1,48 @@
+// Copyright Louis Dionne 2013-2017
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_HANA_TEST_AUTO_LENGTH_HPP
+#define BOOST_HANA_TEST_AUTO_LENGTH_HPP
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/integral_constant.hpp>
+#include <boost/hana/length.hpp>
+
+#include "test_case.hpp"
+
+
+namespace _test_length_detail { template <int> struct undefined { }; }
+
+TestCase test_length{[]{
+    namespace hana = boost::hana;
+    using _test_length_detail::undefined;
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::length(MAKE_TUPLE()),
+        hana::size_c<0>
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::length(MAKE_TUPLE(undefined<1>{})),
+        hana::size_c<1>
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::length(MAKE_TUPLE(undefined<1>{}, undefined<2>{})),
+        hana::size_c<2>
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::length(MAKE_TUPLE(undefined<1>{}, undefined<2>{}, undefined<3>{})),
+        hana::size_c<3>
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::length(MAKE_TUPLE(undefined<1>{}, undefined<2>{}, undefined<3>{}, undefined<4>{}, undefined<5>{}, undefined<6>{})),
+        hana::size_c<6>
+    ));
+}};
+
+#endif // !BOOST_HANA_TEST_AUTO_LENGTH_HPP