1 files changed, 40 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/optional/chain.cpp b/src/boost/libs/hana/test/optional/chain.cpp
new file mode 100644
index 00000000..be3f0ec6
--- /dev/null
+++ b/src/boost/libs/hana/test/optional/chain.cpp
@@ -0,0 +1,40 @@
+// 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)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/chain.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/optional.hpp>
+
+#include <laws/base.hpp>
+namespace hana = boost::hana;
+using hana::test::ct_eq;
+
+
+int main() {
+    auto f = [](auto x) {
+        return hana::just(hana::test::_injection<0>{}(x));
+    };
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::chain(hana::just(ct_eq<3>{}), f),
+        f(ct_eq<3>{})
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::chain(hana::nothing, f),
+        hana::nothing
+    ));
+
+    // test with operators
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::just(ct_eq<3>{}) | f,
+        f(ct_eq<3>{})
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::nothing | f,
+        hana::nothing
+    ));
+}